Reference: 38 CFR 4.124a

Sources & Related Guides

What is the VA rating for Organic CNS Diseases and Miscellaneous Diseases?

Understand guidance across 28 diagnoses under DC 8000-8046 and DC 8100-8108 (excluding TBI/DC 8045 and Migraine/DC 8100, each their own hub), spanning flat-percentage diagnoses, an active-disease sub-branch, and the shared convulsive tic and chorea severity ladders.

Condition Overview & Clinical Scope

This range covers 30 distinct diagnoses across two CFR tables (24 in Organic Diseases of the Central Nervous System, 6 in Miscellaneous Diseases), excluding DC 8045 (TBI) and DC 8100 (Migraine), which are already their own hubs. 16 of the 30 diagnoses have a genuinely closed rating criterion: a flat percentage (bulbar palsy, ALS), a severity ladder (convulsive tic, and chorea's shared ladder used by Sydenham's, Huntington's, and acquired athetosis), or an 'as active disease' sub-branch with a stated duration (10 codes covering encephalitis, brain and spinal cord tumors, embolism/thrombosis/hemorrhage of brain vessels (DC 8007/8008/8009, each its own individually-headed table row), poliomyelitis, hematomyelia, meningitis, and brain abscess). The other 14 diagnoses state only an open minimum-rating floor with no ceiling, or a pure cross-reference dispatch with no independent criteria at all, and are disclosed rather than computed.

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Explore Organic CNS Diseases and Miscellaneous Diseases Criteria & Tools

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Common Questions & FAQs

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What are you trying to understand about organic cns diseases and miscellaneous diseases?

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Overview

About this condition

This range covers 30 distinct diagnoses across two CFR tables (24 in Organic Diseases of the Central Nervous System, 6 in Miscellaneous Diseases), excluding DC 8045 (TBI) and DC 8100 (Migraine), which are already their own hubs. 16 of the 30 diagnoses have a genuinely closed rating criterion: a flat percentage (bulbar palsy, ALS), a severity ladder (convulsive tic, and chorea's shared ladder used by Sydenham's, Huntington's, and acquired athetosis), or an 'as active disease' sub-branch with a stated duration (10 codes covering encephalitis, brain and spinal cord tumors, embolism/thrombosis/hemorrhage of brain vessels (DC 8007/8008/8009, each its own individually-headed table row), poliomyelitis, hematomyelia, meningitis, and brain abscess). The other 14 diagnoses state only an open minimum-rating floor with no ceiling, or a pure cross-reference dispatch with no independent criteria at all, and are disclosed rather than computed.

Regulatory authority: 38 CFR 4.124a, DC 8000-8046, DC 8100-8108

DC 8046 (cerebral arteriosclerosis) is disclosed with dedicated prominence, not as a routine footnote: its text states that the 10 percent rating for purely subjective complaints under DC 9305 'will not be combined with any other rating for a disability due to cerebral or generalized arteriosclerosis' -- an explicit non-combination rule RatingScope discloses rather than applies. This hub explains the published DC 8000-8046/8100-8108 criteria and common record language. It does not diagnose any of these conditions, infer missing severity or active-status documentation, determine service connection, or predict a VA decision. For the 10 active-disease codes, once a diagnosis is confirmed inactive, the current text's residual rating (a stated minimum with no ceiling, rated under the appropriate body system) is disclosed only, never computed. For the 14 disclosure-only diagnoses, each has its own specific reason -- an open minimum-rating floor, a pure dispatch to other diagnostic codes, or a genuine ambiguity in the current text -- shown when that diagnosis is selected.

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.

100%

Highest listed pathway

Three groups reach 100 percent: two flat diagnoses (bulbar palsy and ALS) with no other criteria at all, 8 diagnoses rated 100 percent while documented as currently active (or within a stated duration window), and the top tier of the shared chorea ladder (pronounced, progressive grave type).

What separates the next level: For the active-disease group: once the disease is documented as no longer active, the current text moves to an open minimum-rating floor for residuals, which this hub does not compute. For chorea: the severe tier below describes a less advanced presentation. Every other diagnosis in this range either has its own severity ladder, an active-disease sub-branch, or is disclosure-only.

Review CFR criteria, examples, and evidence
Official CFR language
DC 8005 (bulbar palsy) and DC 8017 (amyotrophic lateral sclerosis) each state a flat 100 percent rating. DC 8000 (encephalitis), DC 8002 (malignant brain tumor), DC 8007-8009 (cerebrovascular embolism, thrombosis, or hemorrhage, for 6 months), DC 8011 (poliomyelitis), DC 8012 (hematomyelia, for 6 months), DC 8019 (meningitis), DC 8020 (brain abscess), and DC 8021 (malignant spinal cord tumor) each state 100 percent as active disease, or within their own stated duration window. DC 8105 rates chorea, Sydenham's, pronounced, progressive grave types, at 100 percent -- shared by DC 8106 (Huntington's, direct dispatch) and DC 8107 (acquired athetosis, a judgment-call dispatch).
Qualification explanation
A confirmed bulbar palsy or ALS diagnosis alone resolves this tier. The 10 active-disease diagnoses additionally require a confirmed-active (or within-duration) status. The chorea group requires a documented pronounced, progressive grave presentation.
Examples
A confirmed diagnosis of ALS.; A confirmed diagnosis of bulbar palsy.; Records documenting active epidemic encephalitis.; Records documenting a malignant brain tumor within the treatment or 2-year continuation period.; Records documenting a pronounced, progressive, grave presentation of Sydenham's or Huntington's chorea.
Medical evidence
Neurology or oncology treatment records confirming the diagnosis; Documentation of current disease activity or treatment timeline, where applicable; Documentation of chorea severity, where applicable
Functional impact examples
A confirmed diagnosis of bulbar palsy or ALS.; A currently active diagnosis within one of the 10 active-disease categories.; A pronounced, progressive grave chorea presentation.
Common misconceptions
ALS's Note directing consideration of special monthly compensation is disclosed only, not a separate computed rating.; A past active-disease diagnosis that has since resolved does not, by itself, establish this tier -- the text requires documented current activity or an applicable duration window.; The text's Note directs consideration of rheumatic etiology and complications for Sydenham's chorea specifically -- disclosed context, not a separate computed rating.
Related topics
bulbar palsy; ALS; active disease; residual dispatch; chorea; Sydenham's chorea; Huntington's chorea; athetosis
Source context
38 CFR 4.124a; 8000, 8002, 8005, 8007-8009, 8011, 8012, 8017, 8019-8021, 8105-8107; Current Organic Diseases of the Central Nervous System and Miscellaneous Diseases tables.

80%

Next: 100%

The chorea ladder's severe tier.

What separates the next level: One tier below the pronounced/progressive grave tier, one above moderately severe.

Review CFR criteria, examples, and evidence
Official CFR language
DC 8105 rates chorea, severe, at 80 percent.
Qualification explanation
Shared by DC 8105, DC 8106, and DC 8107.
Examples
Records documenting severe chorea.
Medical evidence
Neurology treatment records documenting chorea severity
Functional impact examples
Severe chorea findings.
Common misconceptions
None specific to this tier beyond the general ladder notes.
Related topics
chorea
Source context
38 CFR 4.124a; 8105-8107; Current Miscellaneous Diseases table.

50%

Next: 80%

The chorea ladder's moderately severe tier.

What separates the next level: One tier below severe, one above moderate.

Review CFR criteria, examples, and evidence
Official CFR language
DC 8105 rates chorea, moderately severe, at 50 percent.
Qualification explanation
Shared by DC 8105, DC 8106, and DC 8107.
Examples
Records documenting moderately severe chorea.
Medical evidence
Neurology treatment records documenting chorea severity
Functional impact examples
Moderately severe chorea findings.
Common misconceptions
None specific to this tier beyond the general ladder notes.
Related topics
chorea
Source context
38 CFR 4.124a; 8105-8107; Current Miscellaneous Diseases table.

30%

Next: 50%

The chorea ladder's moderate tier, and separately, the convulsive tic ladder's severe tier.

What separates the next level: For chorea: one tier below moderately severe, one above mild. For tic: the highest tic tier.

Review CFR criteria, examples, and evidence
Official CFR language
DC 8105 rates chorea, moderate, at 30 percent. DC 8103 separately rates convulsive tic, severe, at 30 percent.
Qualification explanation
Two unrelated diagnoses share this percentage; the actual diagnosis label determines which ladder applies.
Examples
Records documenting moderate chorea.; Records documenting severe convulsive tic.
Medical evidence
Neurology treatment records documenting the specific diagnosis and severity
Functional impact examples
Moderate chorea, or severe convulsive tic.
Common misconceptions
These are two distinct diagnoses that happen to share a percentage -- not the same finding.
Related topics
chorea; convulsive tic
Source context
38 CFR 4.124a; 8103, 8105-8107; Current Miscellaneous Diseases table.

10%

Next: 30%

The chorea ladder's mild tier, and separately, the convulsive tic ladder's moderate tier.

What separates the next level: For chorea: the lowest compensable tier. For tic: one above mild, one below severe.

Review CFR criteria, examples, and evidence
Official CFR language
DC 8105 rates chorea, mild, at 10 percent. DC 8103 separately rates convulsive tic, moderate, at 10 percent.
Qualification explanation
Two unrelated diagnoses share this percentage; the actual diagnosis label determines which ladder applies.
Examples
Records documenting mild chorea.; Records documenting moderate convulsive tic.
Medical evidence
Neurology treatment records documenting the specific diagnosis and severity
Functional impact examples
Mild chorea, or moderate convulsive tic.
Common misconceptions
These are two distinct diagnoses that happen to share a percentage -- not the same finding.
Related topics
chorea; convulsive tic
Source context
38 CFR 4.124a; 8103, 8105-8107; Current Miscellaneous Diseases table.

0%

Next: 10%

The convulsive tic ladder's mild tier is explicitly stated as 0 percent, the only 0 percent row in this entire range.

What separates the next level: The moderate tier above requires a more significant documented presentation.

Review CFR criteria, examples, and evidence
Official CFR language
DC 8103 rates convulsive tic, mild, at 0 percent.
Qualification explanation
A documented mild presentation resolves this tier.
Examples
Records documenting mild convulsive tic.
Medical evidence
Neurology treatment records documenting tic severity
Functional impact examples
Mild convulsive tic findings.
Common misconceptions
This is an explicitly stated 0 percent finding, not the absence of a match.
Related topics
convulsive tic
Source context
38 CFR 4.124a; 8103; Current Miscellaneous Diseases table.

Learn

Understand the details behind the criteria

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

Why 14 of the 30 diagnoses show no rating tier

Just under half of the diagnoses in this range have only an open minimum-rating floor or a pure cross-reference dispatch, with no independent, closed criteria to compute.

  • 8 diagnoses (DC 8003, 8004, 8010, 8018, 8022, 8023, 8024, 8025) state only a minimum rating with no stated ceiling -- the actual rating depends on residuals rated under the appropriate body system.
  • 3 diagnoses (DC 8013, 8014, 8015, the syphilis and tabes dorsalis trio) have no independent rating criteria at all -- they are rated based on the severity of their residuals under other diagnostic codes entirely, the same pattern as Hiatal Hernia's DC 7346 redirect.
  • DC 8046 (cerebral arteriosclerosis) uses a structurally unique hyphenated dispatch mechanism, disclosed separately.
  • DC 8104 (paramyoclonus multiplex) and DC 8108 (narcolepsy) each carry their own specific ambiguity or cross-hub dispatch, also disclosed separately.

Records to review: Neurology treatment records documenting the specific diagnosis.

DC 8046 (cerebral arteriosclerosis): a hyphenated dispatch, and an explicit non-combination rule

DC 8046 splits into two paths -- a hyphenated dispatch for neurological findings, and a capped, non-combinable 10 percent rating for subjective complaints -- a structure found nowhere else in this repository's built hubs.

  • Purely neurological disabilities due to cerebral arteriosclerosis (the text's own examples: hemiplegia, cranial nerve paralysis) are rated under the diagnostic code for that specific disability, cited with a hyphenated diagnostic code -- for example, 8046-8207.
  • Purely subjective complaints (the text's own examples: headache, dizziness, tinnitus, insomnia, and irritability) recognized as symptomatic of a properly diagnosed cerebral arteriosclerosis are rated 10 percent and no more under DC 9305.
  • The current text states plainly: 'This 10 percent rating will not be combined with any other rating for a disability due to cerebral or generalized arteriosclerosis.' This is an explicit rule in the regulation's own text, not RatingScope's interpretation.
  • RatingScope discloses both paths -- the hyphenated neurological dispatch and the capped, non-combinable subjective-complaint rating -- rather than computing either one (NHD-3).

Records to review: Neurology treatment records documenting a properly substantiated cerebral arteriosclerosis diagnosis and the specific neurological or subjective findings present.

How the shared chorea ladder works across 3 diagnoses

DC 8105's 5-tier severity ladder is reused by DC 8106 and DC 8107, though the text's wording differs slightly between them.

  • DC 8105 (Sydenham's chorea) defines the ladder directly: pronounced/progressive grave (100), severe (80), moderately severe (50), moderate (30), mild (10).
  • DC 8106 (Huntington's chorea) states explicitly: 'rate as Sydenham's chorea.'
  • DC 8107 (acquired athetosis) states only 'rate as chorea' -- RatingScope reads this as the same ladder since it is the only chorea scale defined in this section, but this is a judgment call, disclosed as not certain (NHD-2).

Records to review: Neurology treatment records documenting chorea type and severity.

The 'active disease' sub-branch, and what happens once it resolves

8 diagnoses are rated 100 percent only while documented as currently active (or within a stated duration window); once inactive, the residual rating is disclosed, not computed.

  • Encephalitis, poliomyelitis, meningitis, and brain abscess each use 'as active febrile disease' or 'as active disease' language with no fixed duration.
  • Cerebrovascular incidents (DC 8007-8009) and hematomyelia (DC 8012) use a fixed 6-month window.
  • Malignant brain and spinal cord tumors (DC 8002, DC 8021) use a 2-year continuation period following cessation of treatment.
  • In every case, once the active/duration window ends, the current text moves to an open minimum-rating floor for residuals rated under the appropriate body system -- this hub does not compute that residual rating.

Records to review: Neurology or oncology treatment records documenting current disease activity or treatment timeline.

Evidence

Evidence that may clarify the published criteria

Neurology treatment records

Treatment records document the confirmed diagnosis, severity, and active status.

A diagnosis alone does not identify which percentage tier applies for the diagnoses with severity or active-status sub-questions.

Documented severity or active-status findings

The specific fact each tier is built on -- a severity label for tic/chorea, or a confirmed-active status for the 10 active-disease codes.

A general diagnosis without a documented severity or status finding cannot be substituted for a measured finding.

Personal and firsthand lay evidence

Plain descriptions can help characterize documented symptoms and functional impact.

Lay evidence can describe observed impact, but it should not invent measurements or diagnoses.

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

Organic CNS Diseases and Miscellaneous Diseases

14 diagnoses have closed, computable criteria; the other 14 are disclosed only, each for its own specific reason.

This range covers a clinically diverse set of conditions, from flat-percentage diagnoses to severity ladders to active-disease sub-branches.

Neurology treatment records

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Narcolepsy and epilepsy

This hub does not compute a narcolepsy rating directly. See the Epilepsy hub's minor-seizure track for the actual criteria.

Do not enter narcolepsy findings into this hub expecting a computed result -- the real computation lives in the Epilepsy hub.

Neurology treatment records documenting narcolepsy findings

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TDIU

Even if the schedular rating for Organic CNS Diseases and Miscellaneous Diseases 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

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Common Questions

Questions veterans commonly ask

How does VA rate this range of conditions?

16 of the 30 diagnoses in this range have closed, computable criteria (flat percentages, severity ladders, or active-disease sub-branches); the other 14 have only an open minimum-rating floor or a pure dispatch and are disclosed rather than computed.

Why does my diagnosis show no rating tier?

14 diagnoses in this range state only an open minimum-rating floor with no ceiling, or dispatch entirely to other diagnostic codes with no independent criteria of their own. Each is disclosed with its own specific reason rather than a guessed percentage.

Does DC 8046 (cerebral arteriosclerosis) combine with other ratings?

No. DC 8046's text states that its 10 percent rating for purely subjective complaints under DC 9305 'will not be combined with any other rating for a disability due to cerebral or generalized arteriosclerosis.' Purely neurological disabilities from cerebral arteriosclerosis are rated separately, under the specific diagnostic code involved, cited with a hyphenated code such as 8046-8207. RatingScope discloses both paths rather than computing either one.

How does the shared chorea ladder work?

DC 8105 (Sydenham's chorea) defines a 5-tier severity ladder. DC 8106 (Huntington's chorea) explicitly dispatches to the same ladder. DC 8107 (acquired athetosis) says only 'rate as chorea,' which RatingScope reads as the same ladder -- a judgment call, disclosed as not certain.

What does 'active disease' mean for these codes?

8 diagnoses are rated 100 percent only while documented as currently active, or within a stated duration window (6 months or 2 years, depending on the code). Once inactive, the residual rating is an open floor this hub does not compute.

Is narcolepsy related to epilepsy?

DC 8108 (narcolepsy) is rated as epilepsy, petit mal, per its own text. This hub discloses that cross-reference and links to the Epilepsy/Seizure Disorders hub, but does not compute a narcolepsy rating directly.

If my schedular rating for Organic CNS Diseases and Miscellaneous Diseases 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 100% rating from adjacent levels?

For the active-disease group: once the disease is documented as no longer active, the current text moves to an open minimum-rating floor for residuals, which this hub does not compute. For chorea: the severe tier below describes a less advanced presentation. Every other diagnosis in this range either has its own severity ladder, an active-disease sub-branch, or is disclosure-only.

What separates the 80% rating from adjacent levels?

One tier below the pronounced/progressive grave tier, one above moderately severe.

What separates the 50% rating from adjacent levels?

One tier below severe, one above moderate.

What separates the 30% rating from adjacent levels?

For chorea: one tier below moderately severe, one above mild. For tic: the highest tic tier.

What separates the 10% rating from adjacent levels?

For chorea: the lowest compensable tier. For tic: one above mild, one below severe.

What separates the 0% rating from adjacent levels?

The moderate tier above requires a more significant documented presentation.

Related Conditions

Continue learning through connected topics

Epilepsy/Seizure Disorders

DC 8108 (narcolepsy) is rated as epilepsy, petit mal -- the actual computed criteria live in the Epilepsy hub's minor-seizure track, not here.

TBI / Brain Injury Residuals

Both hubs cover organic brain and central nervous system findings under 38 CFR 4.124a, though each is rated by its own distinct criteria.

Combined Ratings

If more than one condition is involved, combined-rating math is educational context and does not simply add percentages.

Ready when you are

Compare documented findings for this range

Use the documented specific diagnosis, and applicable severity or active/inactive status, already noted 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 findings.

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

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Continue Understanding

Secondary conditions

Conditions commonly connected to Organic CNS Diseases and Miscellaneous Diseases

No commonly documented secondary connections are tracked for Organic CNS Diseases and Miscellaneous Diseases yet.

Educational Guides & Evidence Resources

In-depth analysis of DBQ forms, medical evidence thresholds, and rating schedules for Organic CNS Diseases and Miscellaneous Diseases.

How VA Rates Epilepsy and Seizure Disorders: DC 8910-8914 Frequency Guide

Understand how the VA evaluates epilepsy and seizure disorders under 38 CFR 4.124a based on major versus minor seizure frequency and continuous medication.

Keep going

Related Tools

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.

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Evidence Center

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

Open Evidence Center