Osteomyelitis (DC 5000)
An infection in the bone, with severity described by location, activity, and constitutional symptoms.
DC 5000's own Note treats the 10 percent inactive rating as an exception to the amputation rule, and states the 60 percent constitutional-symptoms rating is not subject to the amputation rule -- disclosed here, not modeled as a separate computed pathway.
Arthritis DBQ; imaging reports; involucrum; sequestrum; discharging sinus
Bone/joint tuberculosis, inactive (DC 5001)
Active bone/joint tuberculosis is a flat 100 percent. Inactive bone/joint tuberculosis is not computed by RatingScope -- it is a cross-reference to a different, closed set of provisions.
This is the sixth confirmed recurring instance of this active/inactive tuberculosis cross-reference pattern already tracked across this repository, alongside Eye Conditions' DC 6010, Genitourinary's DC 7505/7525, Infectious Diseases' DC 6311, and the Tuberculosis and Larynx hubs' DC 6732/DC 6515.
Arthritis DBQ; active tuberculosis; inactive tuberculosis
Rheumatoid arthritis, active process (DC 5002)
How active, incapacitating rheumatoid-type arthritis is rated while the disease process itself is active.
DC 5002's own Note (3) directs assigning the higher evaluation between this active-process rating and the rating for chronic residuals (limitation of motion, ankylosis, or DC 5003 residuals). RatingScope does not compute that comparison -- it only ever returns the active-process tier. This is a disclosed, unresolved limitation (NHD-1), not a silent assumption.
Arthritis DBQ; examination findings; exacerbations; constitutional manifestations; DC 5003
DC 5009, other specified forms of arthropathy
An active DC 5009 arthropathy is rated exactly like active rheumatoid arthritis under DC 5002. Chronic residuals are rated as DC 5003 residuals instead.
RatingScope computes only DC 5009's active-phase branch, using DC 5002's table with a distinct flag set so the source code stays traceable. DC 5009's chronic-residuals branch (DC 5003) is disclosed only, never computed, because DC 5003 itself is disclosed-only in this hub. DC 5004-5008 (5 specific infectious-arthritis types -- gonorrheal, pneumococcic, typhoid, syphilitic, and streptococcic arthritis) share this exact same active-to-5002/chronic-to-5003 dispatch note as DC 5009. Per a deliberate, explicit scope-narrowing choice -- not an oversight -- only DC 5009's active branch is computed here; DC 5004-5008 is disclosed only, even though the underlying dispatch mechanism is identical. This asymmetry is intentional: RatingScope computes only the codes explicitly named as having real independent criteria, and DC 5004-5008's own text has none beyond the shared dispatch note.
Arthritis DBQ; DC 5002; DC 5003; infectious arthritis
Degenerative arthritis cross-reference (DC 5003)
DC 5003 is not a second, separate rating that stacks on top of a joint's limitation-of-motion rating. It is a fallback that applies only in place of a limitation-of-motion rating that would otherwise be 0 percent -- one or the other, never both, for the same joint.
DC 5003's own Note (1), verbatim: "The 20 pct and 10 pct ratings based on X-ray findings, above, will not be combined with ratings based on limitation of motion." (38 CFR 4.71a, verified against eCFR and Cornell LII, 2026-08-02). This is the general fallback that many other joint-specific hubs in this repository (Knee, Hip, Shoulder/Arm, Ankle, Spine, Cervical Spine, Muscle Injuries, Amputations) already reference but have never computed -- a known, deliberately deferred scope item, matching Spine's existing DC 5003/5010 disclosure precedent. It carries zero registry rows and zero computed logic in this Arthritis hub, exactly as it does in every joint-specific hub that already references it. What changed here is the explicit disclosure of Note (1) itself: describing the dispatch mechanism (rate under the joint's own code; only if that comes out noncompensable, use DC 5003 instead) without ever naming the Note left open a real misreading -- that a documented X-ray finding of arthritis and a separately measured limitation of motion in the same joint might both be ratable. They are not; Note (1) forecloses it by name, not just by the shape of the dispatch.
imaging reports; DC 5002; DC 5009; DC 5010; limitation of motion
Post-traumatic arthritis (DC 5010)
A post-traumatic arthritis diagnosis is rated entirely under the affected joint's own code -- it has no independent table of its own.
DC 5010 is disclosed only, never computed, in this hub. Its current (post-2021) text dispatches directly to the affected joint's own hub, which this Arthritis hub does not own.
imaging reports; joint-specific DBQs; DC 5003
Decompression illness (DC 5011)
DC 5011 has no percentage table of its own -- it points to a different code depending on which body system is affected, and its own text never names which specific arthritis code applies to the musculoskeletal branch.
DC 5011 is disclosed only, never computed, in this hub -- an initial build routed the musculoskeletal branch through DC 5002, but DC 5011's own text just says 'arthritis' without naming a code. DC 5002 is titled 'Multi-joint arthritis... as an active process' (an inflammatory, multi-joint disease with systemic symptoms); DC 5003 is 'Degenerative arthritis,' the schedule's generic structural-damage fallback. Decompression illness's joint damage (for example avascular necrosis) is a degenerative/structural process, not an active multi-joint inflammatory one, so DC 5003 is the more textually and clinically defensible reading here -- but DC 5003 is itself disclosed only in this hub, so DC 5011's musculoskeletal branch has no independent computable criteria either way. The auditory, respiratory, and neurologic branches point to other body-system hubs outside Arthritis entirely and are disclosed only for the same reason any cross-hub dispatch is disclosed rather than computed.
Arthritis DBQ; specialty examination records; DC 5002; DC 5003
Malignant bone neoplasm (DC 5012)
A malignant bone tumor is rated at the highest level.
DC 5012's own Note provides that the 100 percent rating continues for 1 year following the cessation of surgical, X-ray, antineoplastic chemotherapy, or other prescribed therapeutic procedure. If there has been no local recurrence or metastasis, residuals are then rated separately. This 1-year continuation is disclosed here, not modeled as a second computed tier -- the single 100 percent row governs regardless of where in that continuation window the documented facts fall.
Arthritis DBQ; oncology records; 1-year continuation
DC 5013-5024 cross-reference range
These 9 remaining codes in the DC 5013-5024 range do not have their own independent rating tables -- they all point back to DC 5003.
DC 5018, DC 5020, and DC 5022 are confirmed removed from this range and are not addressed here. A discrepancy in the removal dates for these 3 codes across different sources (DC 5020 dated to the amending rule's publication date, the other two to its effective date) is disclosed but not resolved (NHD-4).
imaging reports; DC 5003; DC 5018; DC 5020; DC 5022
TDIU
Even if the schedular rating for Arthritis 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