`M02.329` Reiter's disease, unspecified elbow

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Behçet's disease (M35.2)
direct infections of joint in infectious and parasitic diseases classified elsewhere (M01.-)
postmeningococcal arthritis (A39.84)
mumps arthritis (B26.85)
rubella arthritis (B06.82)
syphilis arthritis (late) (A52.77)
rheumatic fever (I00)
tabetic arthropathy [Charcôt's] (A52.16)

underlying disease, such as:
congenital syphilis [Clutton's joints] (A50.5)
enteritis due to Yersinia enterocolitica (A04.6)
infective endocarditis (I33.0)
viral hepatitis (B15-B19)

Risk adjustment (HCC)

CMS-HCC V28: HCC 94 — Systemic Lupus Erythematosus and Other Specified Systemic Connective Tissue Disorders
CMS-HCC V22: HCC 40 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease
RxHCC V08: HCC 83 — Rheumatoid Arthritis and Other Inflammatory Polyarthropathy
ESRD V24: HCC 40

Defines the logic of DRG(s) 545-547 in MDC 08.

099.3 Reiter's disease (approximate)
711.12 Arthropathy associated with Reiter's disease and nonspecific urethritis, upper arm (approximate)

Unspecified code (laterality): Unspecified codes for which a more specific code identifying laterality (right, left, bilateral) exists within the same code family.

Type 1 Excludes: A74 Other diseases caused by chlamydiae ("Reiter's disease (M02.3-)")
Code First: L86 Keratoderma in diseases classified elsewhere ("Reiter's disease (M02.3-)")
Type 1 Excludes: M01 Direct infections of joint in infectious and parasitic diseases classified elsewhere ("reactive arthritis (M02.3)")
Type 1 Excludes: M45 Ankylosing spondylitis ("arthropathy in Reiter's disease (M02.3-)")
Type 2 Excludes: N34 Urethritis and urethral syndrome ("Reiter's disease (M02.3-)")

Type 1 Excludes: M01 Direct infections of joint in infectious and parasitic diseases classified elsewhere ("postinfective arthropathy (M02.-)")