Reference: 38 CFR 4.124a

Sources & Related Guides

What is the VA rating for Migraine / Headaches?

Review migraine guidance around prostrating attacks, frequency over time, whether attacks are completely prostrating and prolonged, and whether economic impact is documented.

Condition Overview & Clinical Scope

VA's migraine schedule focuses on the character and frequency of documented prostrating attacks. The 50% pathway adds separate questions about whether attacks are very frequent, completely prostrating, prolonged, and productive of severe economic inadaptability. Total headache count, pain intensity, diagnosis, medication, or imaging does not replace those published terms.

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Overview

About this condition

VA's migraine schedule focuses on the character and frequency of documented prostrating attacks. The 50% pathway adds separate questions about whether attacks are very frequent, completely prostrating, prolonged, and productive of severe economic inadaptability. Total headache count, pain intensity, diagnosis, medication, or imaging does not replace those published terms.

Regulatory authority: 38 CFR 4.124a, Diagnostic Code 8100, Migraine

IMPORTANT DISCLOSURE: DC 5025 (fibromyalgia) lists headache among the symptoms that may accompany fibromyalgia -- a genuine 38 CFR 4.14 pyramiding consideration when a migraine rating and a fibromyalgia rating are both built on the same headache symptom. RatingScope discloses this; it does not automatically create separate percentages when the same symptoms overlap. This hub explains the published DC 8100 schedule and common record language. It does not diagnose migraine, determine service connection, infer undocumented attacks, estimate an outcome, or replace medical care or accredited representation. Other headache routes, including TBI-related or other separately evaluated conditions, require their own review.

Percentage Guides

Understanding Your Percentage

Select a pathway to see what the published criteria ask about, what records may clarify it, and what should not be assumed.

0%

Next: 10%

The 0% pathway describes less frequent attacks. RatingScope also uses this pathway when the documented headache pattern does not establish a compensable prostrating-attack frequency, while treating unclear facts as missing detail rather than absence.

What separates the next level: The 10% level requires characteristic prostrating attacks averaging one in two months over the last several months.

Review CFR criteria, examples, and evidence
Official CFR language
With less frequent attacks.
Qualification explanation
The record should distinguish a less-frequent or non-prostrating pattern from missing information about whether attacks are prostrating and how often they occur.
Examples
The record documents headache attacks but not a compensable frequency of characteristic prostrating attacks.; Documented prostrating attacks occur less often than the 10% frequency description.; Enough information is available to distinguish less frequent attacks from an unknown attack pattern.
Medical evidence
Headache treatment records; Headache log covering the relevant period; Headaches DBQ attack-frequency section
Functional impact examples
The record describes headache symptoms without the prostrating frequency used for a compensable pathway.; An attack pattern can be medically important even when it does not match a compensable DC 8100 frequency description.
Common misconceptions
A 0% pathway does not mean headaches are imaginary or unimportant.; Missing frequency details should not be treated as proof of less frequent attacks.; A migraine diagnosis alone does not establish a compensable percentage.
Related topics
less frequent attacks; non-prostrating headaches; attack frequency; missing detail
Source context
38 CFR 4.124a; 8100; Current DC 8100 educational pathway.

10%

Next: 30%

The 10% level describes characteristic prostrating attacks averaging one in two months over the last several months.

What separates the next level: The 30% level changes the average frequency from one in two months to once a month over the last several months.

Review CFR criteria, examples, and evidence
Official CFR language
With characteristic prostrating attacks averaging one in 2 months over last several months.
Qualification explanation
The record should identify attacks as characteristic and prostrating, describe the average frequency, and cover the last several months. Total headache days are not automatically prostrating attack days.
Examples
A clinician or DBQ documents characteristic prostrating attacks averaging once every two months.; A headache log shows which attacks substantially interrupted ordinary activity and how often they occurred.; The documented timeframe covers several months rather than a single unusually severe week.
Medical evidence
Headaches DBQ; Headache log with dates and functional effects; Treatment records describing prostrating attacks
Functional impact examples
An attack requires stopping ordinary activity and resting.; The frequency averages about one characteristic prostrating attack every two months.
Common misconceptions
Every headache is not automatically a prostrating attack.; Pain intensity alone does not establish the frequency requirement.; Taking prescription medication does not automatically establish 10%.
Related topics
characteristic prostrating attacks; one in two months; last several months; headache log
Source context
38 CFR 4.124a; 8100; Current DC 8100 educational pathway.

30%

Next: 50%

The 30% level describes characteristic prostrating attacks occurring on average once a month over the last several months.

What separates the next level: The 50% level is not simply more than one attack a month. It also requires very frequent, completely prostrating and prolonged attacks productive of severe economic inadaptability.

Review CFR criteria, examples, and evidence
Official CFR language
With characteristic prostrating attacks occurring on an average once a month over last several months.
Qualification explanation
The record should document the prostrating nature of the attacks, an average monthly frequency, and the relevant several-month pattern. It should not substitute total headache frequency for prostrating-attack frequency.
Examples
The DBQ documents characteristic prostrating attacks averaging once each month.; A longitudinal log and treatment notes show a recurring monthly prostrating pattern.; The record separates ordinary headache days from attacks that substantially prevent ordinary activity.
Medical evidence
Headaches DBQ attack section; Headache log covering several months; Neurology or primary-care treatment notes
Functional impact examples
A recurring attack requires the veteran to stop ordinary activities and recover.; The documented average reaches approximately one prostrating attack per month.
Common misconceptions
Frequent headaches are not the same as frequent prostrating attacks.; One severe month does not automatically describe the average over several months.; Work impact alone does not replace the prostrating attack and frequency findings.
Related topics
monthly prostrating attacks; longitudinal pattern; functional impact; adjacent percentages
Source context
38 CFR 4.124a; 8100; Current DC 8100 educational pathway.

50%

Highest listed pathway

The 50% level describes very frequent, completely prostrating and prolonged attacks that are productive of severe economic inadaptability.

What separates the next level: Unlike 30%, the 50% pathway adds complete prostration, prolonged duration, very frequent occurrence, and severe economic impact. It is the highest schedular DC 8100 level.

Review CFR criteria, examples, and evidence
Official CFR language
With very frequent completely prostrating and prolonged attacks productive of severe economic inadaptability.
Qualification explanation
Each part of the published phrase matters: the attacks must be very frequent, completely prostrating, prolonged, and connected to severe economic inadaptability. RatingScope does not infer one element from another or decide how VA will apply the phrase to an individual record.
Examples
The record separately documents attack frequency, complete prostration, duration, and serious work-function effects.; A headache log aligns with clinical and occupational records over the same period.; The evidence describes what happens during attacks rather than relying on the phrase severe migraine alone.
Medical evidence
Headaches DBQ; Longitudinal headache log; Treatment and neurology records; Employment, attendance, accommodation, or leave records when available
Functional impact examples
Documented attacks substantially prevent ordinary activity for prolonged periods.; The record describes serious disruption to reliable work functioning tied to the attacks.
Common misconceptions
Having more than one headache per month does not by itself establish 50%.; Medication failure or a neurology referral does not replace the published elements.; Employment status alone does not answer whether the documented attacks produce severe economic inadaptability.
Related topics
very frequent attacks; completely prostrating attacks; prolonged attacks; severe economic inadaptability
Source context
38 CFR 4.124a; 8100; Current DC 8100 educational pathway and highest listed schedular percentage.

Learn

Understand the details behind the criteria

Use these short guides to connect published terms with the records and observations that may clarify them.

Migraine and fibromyalgia: a disclosed pyramiding consideration

DC 5025 (fibromyalgia) lists headache among the symptoms that may accompany fibromyalgia -- a genuine 38 CFR 4.14 pyramiding consideration when a migraine rating and a fibromyalgia rating are both built on the same headache symptom.

  • Neither DC 5025 nor DC 8100 contains its own dispatch or combination note for this overlap -- this is a general 4.14 anti-pyramiding principle, not a DC-specific rule.
  • Different diagnosis names do not automatically create separate percentages when the same symptoms and functional effects overlap.
  • Whether a documented headache is genuinely distinct from fibromyalgia-associated headache, or the same manifestation under two names, requires case-specific review beyond this hub.

Records to review: Records distinguishing migraine headache findings from fibromyalgia-associated headache symptoms, if both diagnoses are documented.

How to read and maintain a migraine log

A migraine log can preserve a contemporaneous pattern that may be difficult to reconstruct later. It should record what actually happened, not translate an attack into a percentage or legal conclusion.

  • Record the date, start time, end time, and whether symptoms returned.
  • Describe headache and associated symptoms such as nausea, vomiting, light sensitivity, sound sensitivity, visual changes, or sensory changes.
  • Record whether ordinary activity stopped, what recovery required, and how long that limitation lasted.
  • Note work, school, household, caregiving, driving, or appointment effects without exaggeration or minimization.
  • Record medication taken and the observed response, not assumptions about what medication should prove.
  • Use a consistent period so frequency can be understood over the last several months.

Records to review: headache log; treatment records; medication history; work or attendance records.

What prostrating and completely prostrating mean

The current VA Headaches DBQ describes prostrating as extreme exhaustion, powerlessness, debilitation, or incapacitation with substantial inability to engage in ordinary activities. Complete prostration is a distinct 50% question and should not be assumed from pain severity alone.

  • Describe the actual interruption to ordinary activities during an attack.
  • Separate severe pain from the functional effect described by the prostrating term.
  • Keep ordinary headache days separate from characteristic prostrating attacks.
  • Use clinician or examiner wording when the record already documents the finding.

Records to review: Headaches DBQ; headache log; clinical history; firsthand statements.

Understanding severe economic inadaptability

Severe economic inadaptability is part of the 50% DC 8100 language. It asks about serious economic or work-function effects produced by the attack pattern; it should not be reduced to a job title, employment status, or one missed shift.

  • Connect work effects to the documented migraine attacks rather than unrelated circumstances.
  • Review attendance, leave, reliability, accommodations, reduced duties, or other concrete effects when available.
  • Being employed does not by itself describe the severity of work disruption.
  • RatingScope explains the term but does not decide whether a record legally satisfies it.

Records to review: employment records; leave records; employer or coworker statements; headache log.

Common migraine evidence

Migraine evidence is strongest when different records describe the same pattern consistently across diagnosis, attack characteristics, frequency, duration, and functional effect.

  • Medical records can document diagnosis, symptoms, treatment, and longitudinal history.
  • Firsthand statements can describe observable attack behavior and daily effects.
  • Logs can preserve dates, duration, symptoms, and activity or work interruption.
  • No single evidence type automatically determines a percentage.

Records to review: medical records; lay statements; headache logs; employment evidence.

How to read the Headaches DBQ

The official Headaches DBQ organizes diagnosis, medical history, continuous medication, pain and associated symptoms, duration, location, prostrating attacks, diagnostic findings, and work impact.

  • The form distinguishes characteristic prostrating attacks from completely prostrating and prolonged attacks.
  • Frequency is recorded over the last several months.
  • The work-impact section asks for examples rather than a percentage conclusion.
  • The examiner gathers evidence; the examiner does not issue the final benefits decision.

Records to review: Headaches DBQ; C&P examination; treatment history; functional impact examples.

Common migraine C&P exam misunderstandings

A migraine examination should document the history and current pattern accurately. It is not a test of endurance and should not become an exercise in matching memorized criteria language.

  • Do not count every headache as prostrating when the functional effect was different.
  • Do not minimize an attack because it was managed at home rather than in an emergency department.
  • Do not exaggerate symptoms, frequency, or work effects.
  • Use concrete examples and the time period requested when memory allows.

Records to review: Headaches DBQ; headache log; treatment records; medication list.

Medication and treatment misconceptions

Prescription medication, injections, preventive treatment, neurology care, or an unsuccessful treatment trial may explain the clinical history, but none independently substitutes for the DC 8100 attack findings.

  • Record treatment response because it may clarify the observed attack pattern.
  • Medication use does not create an automatic percentage.
  • Imaging is not required by the Headaches DBQ and does not measure prostrating attack frequency.
  • Treatment intensity and schedule criteria answer different questions.

Records to review: prescription history; neurology records; treatment notes; Headaches DBQ.

Evidence

Evidence that may clarify the published criteria

Medical and treatment records

May document diagnosis, headache history, associated symptoms, treatment, clinician observations, and changes in the attack pattern over time.

Treatment frequency or diagnosis alone does not establish a percentage pathway.

Migraine or headache log

May preserve attack dates, duration, symptoms, prostrating effects, recovery, medication response, and activity or work interference over the relevant period.

A log should record observed facts. It should not assign a percentage or copy criteria language that does not describe the attack.

Veteran and firsthand lay statements

May describe what the veteran or another person directly observed during attacks, including interruption of ordinary activity, recovery needs, and changes over time.

Lay evidence can describe firsthand observations but does not create a diagnosis or undocumented clinical finding.

Employer, attendance, leave, or accommodation records

May clarify reliable attendance, missed or interrupted work, leave use, accommodations, reduced duties, or other economic effects tied to documented attacks.

Employment evidence is context. Job status by itself does not establish or exclude severe economic inadaptability.

Prescription and treatment history

May show preventive and acute medications, treatment changes, response, side effects, and the clinical history surrounding the attack pattern.

Medication type, dose, or treatment failure does not automatically determine a DC 8100 percentage.

Neurology and primary-care visits

May document diagnosis, differential considerations, symptoms, examination findings, treatment response, and the reported attack pattern.

Specialist care is not an automatic requirement for every migraine record.

Headaches Disability Benefits Questionnaire

Organizes diagnosis, history, medication, symptoms, duration, location, prostrating attack frequency, other findings, testing, and functional impact.

A DBQ organizes evidence but does not issue the final VA decision.

Official VA Forms & DBQs

Downloadable DBQs & Supporting Claim Forms

Take the public DBQ to your private physician or review it prior to your C&P examination.

Terminology

Plain-English terms

Prostrating attack

The attack substantially prevents ordinary activity; severe pain alone does not automatically answer the functional question.

DC 8100 uses characteristic prostrating attacks to distinguish the 10% and 30% pathways from less frequent attacks.

Headaches DBQ; headache log; treatment notes; ordinary activities; functional impact

Completely prostrating attack

The record describes complete prostration rather than assuming it from pain intensity or an ordinary prostrating attack.

Complete prostration is one of several distinct elements in the 50% pathway.

Headaches DBQ; headache log; prolonged attacks; very frequent attacks

Attack frequency

Count the attacks the schedule asks about, not every headache day, and understand the pattern over several months rather than one isolated period.

The schedule distinguishes less frequent attacks, one prostrating attack in two months, monthly prostrating attacks, and very frequent attacks.

headache log; DBQ frequency section; last several months; longitudinal pattern

Prolonged attack

Duration should be documented separately from frequency and complete prostration.

A prolonged pattern is required by the 50% wording and should not be inferred from a general diagnosis.

Headaches DBQ duration section; headache log; completely prostrating attacks

Severe economic inadaptability

The record describes severe disruption to economic or work functioning produced by the attack pattern. Employment status alone does not answer the question.

It is a distinct 50% element and should be supported by concrete, attack-related information rather than inferred from frequency alone.

employment records; leave records; headache log; firsthand statements; reliability; attendance; accommodations

Secondary condition

Whether migraine is secondary is a service-connection question. It is separate from the DC 8100 question of how a documented migraine pattern is described by the schedule.

RatingScope's migraine criteria review does not determine causation, aggravation, or service connection.

diagnosis records; medical nexus evidence; treatment history; causation; aggravation; service connection

Medication response

Medication history can explain treatment and observed changes, but medication type or failure does not independently assign a DC 8100 percentage.

Treatment context may support a longitudinal history without replacing the attack findings in the schedule.

prescription history; treatment notes; treatment response; side effects

TDIU

Even if the schedular rating for Migraine / Headaches does not reach 100 percent, TDIU may still provide a pathway to compensation at the 100 percent rate, based on unemployability from this and/or other service-connected disabilities combined.

A lower schedular percentage does not by itself foreclose TDIU eligibility -- this hub computes only the schedular percentage for this specific condition and does not determine TDIU eligibility.

Employment history; vocational impact documentation; occupational impairment

Common Questions

Questions veterans commonly ask

Can migraine and fibromyalgia be rated separately?

Not automatically for the same headache symptom. DC 5025 (fibromyalgia) lists headache as a symptom that may accompany fibromyalgia, creating a genuine 38 CFR 4.14 pyramiding consideration with a migraine rating. RatingScope discloses this; different diagnosis names do not automatically create separate percentages when the same symptoms overlap.

How does VA rate migraines?

VA uses Diagnostic Code 8100. The published levels focus on characteristic prostrating attacks and their average frequency. The 50% level adds very frequent, completely prostrating and prolonged attacks productive of severe economic inadaptability.

What is a prostrating attack?

The current VA Headaches DBQ describes prostrating as causing extreme exhaustion, powerlessness, debilitation, or incapacitation with substantial inability to engage in ordinary activities. The actual functional effect should be documented rather than assumed from pain intensity alone.

What does severe economic inadaptability mean?

It is the economic-impact phrase in the 50% criteria. Records may clarify serious attack-related effects on attendance, reliability, leave, accommodations, duties, or other work functioning. RatingScope explains the phrase but does not decide whether an individual record legally satisfies it.

Do migraine logs matter?

A contemporaneous log may help show dates, duration, symptoms, prostrating effects, recovery, medication response, and work or activity interference over several months. A log is most useful when it records observed facts consistently and does not assign its own percentage.

How often should headaches occur for each percentage?

The schedule describes less frequent attacks at 0%, characteristic prostrating attacks averaging one in two months at 10%, and characteristic prostrating attacks averaging monthly at 30%. The 50% level uses very frequent attacks plus additional requirements. Total headache days are not automatically prostrating attack days.

Can I still work and have severe migraine-related work impact?

Employment status alone does not describe how reliably a veteran can function during and around attacks. The relevant evidence may include concrete attack-related effects on attendance, reliability, leave, accommodations, or duties. RatingScope does not make an individual legal determination.

Can migraines be secondary to another condition?

A veteran may raise migraine as secondary to another condition, but causation or aggravation is a separate service-connection question. This hub explains DC 8100 severity language and does not determine a medical relationship or service connection.

What evidence commonly helps explain migraine severity?

Headache logs, treatment records, a Headaches DBQ, firsthand statements, medication history, neurology or primary-care notes, and work-impact records may help explain the pattern. No single item automatically controls the outcome.

What happens during a migraine C&P exam?

The examiner may review diagnosis, history, medication, headache and associated symptoms, pain duration and location, prostrating attack frequency, other findings, testing, and work impact. The examination gathers information for VA; the examiner does not issue the final benefits decision.

Does medication or imaging determine the migraine percentage?

No. Medication and imaging may provide clinical context, but DC 8100 distinguishes percentages using the documented attack pattern and the specific elements in the schedule. The official Headaches DBQ notes that diagnostic testing is not required for the examination report.

If my schedular rating for Migraine / Headaches is below 100%, can I still be compensated at the 100% rate?

Possibly, through TDIU (Total Disability rating based on Individual Unemployability, 38 CFR 4.16) -- a separate pathway to 100 percent compensation based on unemployability, from this and/or other service-connected disabilities combined, independent of whether the schedular rating itself reaches 100 percent. This hub computes only the schedular percentage and does not determine TDIU eligibility.

What separates the 0% rating from adjacent levels?

The 10% level requires characteristic prostrating attacks averaging one in two months over the last several months.

What separates the 10% rating from adjacent levels?

The 30% level changes the average frequency from one in two months to once a month over the last several months.

What separates the 30% rating from adjacent levels?

The 50% level is not simply more than one attack a month. It also requires very frequent, completely prostrating and prolonged attacks productive of severe economic inadaptability.

What separates the 50% rating from adjacent levels?

Unlike 30%, the 50% pathway adds complete prostration, prolonged duration, very frequent occurrence, and severe economic impact. It is the highest schedular DC 8100 level.

Ready when you are

Compare documented migraine findings

Use the attack type, frequency, timeframe, duration, and work-impact language already documented in your records. Do not upload records or enter Social Security numbers, claim numbers, full dates of birth, or other sensitive identifiers. RatingScope does not infer missing attack findings.

Informational guidance only. RatingScope does not predict, decide, or guarantee VA outcomes.

Compare my migraine records

Learn More

Continue Understanding

RatingScope resource

Fibromyalgia (38 CFR 4.71a, DC 5025)

DC 5025's qualifying condition lists headache as a symptom that may accompany fibromyalgia. RatingScope discloses this as a pyramiding consideration (38 CFR 4.14) -- different diagnosis names do not automatically create separate percentages when the same symptoms overlap -- not a computed dispatch rule between the two hubs.

Open Fibromyalgia (38 CFR 4.71a, DC 5025)

RatingScope resource

C&P Exam Intelligence

Understand the purpose of a claim exam and the boundary between examination and final VA decision.

Open C&P Exam Intelligence

RatingScope resource

VA Claim Evidence Center

Understand common medical, lay, DBQ, and employment evidence categories without treating one item as a guaranteed requirement.

Open VA Claim Evidence Center

RatingScope resource

Migraine log guide

Review a factual, non-coaching approach to recording attack frequency, duration, symptoms, functional effects, and work interference.

Open Migraine log guide

RatingScope resource

RatingScope Learn Center

Continue understanding published criteria, evidence language, and the VA claim process.

Open RatingScope Learn Center

Secondary conditions

Conditions commonly connected to Migraine / Headaches

This reflects regulatory and clinical relationships already explained elsewhere on this site. It is not a diagnosis, not a prediction that you have or will develop a connected condition, and not personalized medical or legal advice.

Regulatory relationship

Migraine / Headaches Fibromyalgia

DC 5025's own qualifying-condition text lists headache as a symptom that may accompany fibromyalgia.

38 CFR 4.14

View Fibromyalgia

Educational relationship

Migraine / Headaches Tinnitus

Migraines are frequently claimed as secondary to Tinnitus due to severe, chronic auditory distress triggering tension or neurological headaches.

View Tinnitus

Educational relationship

Migraine / Headaches Neck / Cervical Spine

Cervical Spine's own guidance names migraine as a condition sometimes documented alongside neck findings, with an explicit disclaimer that the relationship is not automatic.

View Neck / Cervical Spine

Educational relationship

Migraine / Headaches Mental Health

Mental-health symptoms and migraine may affect the same period of functioning, but each uses a separate rating formula.

View Mental Health

Common claim pattern, not a presumption

Migraine / Headaches TBI / Brain Injury Residuals

Commonly discussed as a secondary condition in VA claims practice: Headache residuals of a head injury may be separately evaluated under the migraine criteria rather than the TBI facet table. This is a rating-dispatch note in DC 8045's own text, not a stated regulatory comorbidity.

38 CFR 4.124a, DC 8045

View TBI / Brain Injury Residuals

Educational Guides & Evidence Resources

In-depth analysis of DBQ forms, medical evidence thresholds, and rating schedules for Migraine / Headaches.

How VA Rates Migraines

Explain how VA evaluates migraines using frequency, severity, prostrating attacks, and economic impact.

What Prostrating Means for VA Migraine Ratings

Explain the rating significance of "prostrating" migraine attacks and why documentation matters.

VA Migraine Evidence Guide: Headache Logs, Prostrating Attacks, and Economic Loss

Learn the essential medical and lay evidence needed for a 50% VA migraine rating under DC 8100, including headache logs and economic inadaptability proof.

Common VA Secondary Conditions to Migraines: Links, Aggravation, and Rules

Discover common secondary connections between migraines and other conditions, including tinnitus, neck pathology, and PTSD under 38 CFR 3.310.

How VA Rates Headaches: Tension, Cervicogenic, Post-Traumatic, and Cluster Headache Guide

Understand how the VA rates non-migraine headaches under 38 CFR 4.124a, Diagnostic Code 8100 by analogy, prostrating attack criteria, and secondary claims.

How VA Rates TBI: DC 8045 Residual Facets and Co-Morbid PTSD

Learn how the VA evaluates Traumatic Brain Injury under 38 CFR 4.124a (DC 8045) across 10 distinct cognitive facets and coordinates ratings with PTSD.

What Evidence Matters Before Evaluating Your VA Rating?

Learn how VA disability rating criteria evaluate medical facts, documented symptoms, and clinical findings under published CFR standards.

Why Do VA Rating Criteria Differ by Condition?

Understand how VA disability rating criteria use symptoms, measurements, severity levels, and documentation to organize rating guidance.

Common VA Secondary Conditions to Tinnitus: Mental Health, Sleep, and Migraines

Explore secondary conditions linked to service-connected tinnitus, including anxiety, depression, insomnia, and migraines under 38 CFR 3.310.

Keep going

Compare a percentage level and combined-rating math, or review evidence context.

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VA Math & Combined Ratings

Understand the whole-person method, final rounding, and bilateral limits, then calculate how percentages combine.

Open VA Math guide

Evidence Center

Understand common evidence categories and what they can clarify without treating them as a checklist.

Open Evidence Center