ICD-10-CM 2027
ICD-10 code for juvenile arthritis
From the official ICD-10-CM alphabetic index entry “Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute) › juvenile”. Page updated September 29, 2026.
About coding juvenile arthritis
The ICD-10-CM code for juvenile arthritis is M08.90 (Juvenile arthritis, unspecified, unspecified site). The official index lists 35 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on M08.90.
Within M08.9, choose M08.90 (unspecified site) only when documentation doesn't support a more specific option: shoulder (M08.91), elbow (M08.92), wrist (M08.93), hand (M08.94), hip (M08.95), knee (M08.96), ankle and foot (M08.97), vertebrae (M08.98) and 2 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 545 (Connective Tissue Disorders with MCC, relative weight 2.3892), DRG 546 (Connective Tissue Disorders with CC, relative weight 1.1745) and DRG 547 (Connective Tissue Disorders without CC/MCC, relative weight 0.7526), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific juvenile arthritis codes (official index)
- with systemic onset
- ankle M08.97 — Juvenile arthritis, unspecified, ankle and foot
- elbow M08.92 — Juvenile arthritis, unspecified, elbow
- foot joint M08.97 — Juvenile arthritis, unspecified, ankle and foot
- hand joint M08.94 — Juvenile arthritis, unspecified, hand
- hip M08.95 — Juvenile arthritis, unspecified, hip
- knee M08.96 — Juvenile arthritis, unspecified, knee
- multiple site M08.99 — Juvenile arthritis, unspecified, multiple sites
- pauciarticular M08.40 — Pauciarticular juvenile rheumatoid arthritis, unspecified site
- ankle M08.47 — Pauciarticular juvenile rheumatoid arthritis, ankle and foot
- elbow M08.42 — Pauciarticular juvenile rheumatoid arthritis, elbow
- foot joint M08.47 — Pauciarticular juvenile rheumatoid arthritis, ankle and foot
- hand joint M08.44 — Pauciarticular juvenile rheumatoid arthritis, hand
- hip M08.45 — Pauciarticular juvenile rheumatoid arthritis, hip
- knee M08.46 — Pauciarticular juvenile rheumatoid arthritis, knee
- shoulder M08.41 — Pauciarticular juvenile rheumatoid arthritis, shoulder
- specified site NEC M08.4A — Pauciarticular juvenile rheumatoid arthritis, other specified site
- vertebrae M08.48 — Pauciarticular juvenile rheumatoid arthritis, vertebrae
- wrist M08.43 — Pauciarticular juvenile rheumatoid arthritis, wrist
- psoriatic L40.54 — Psoriatic juvenile arthropathy
- rheumatoid
- shoulder M08.91 — Juvenile arthritis, unspecified, shoulder
- specified site NEC M08.9A — Juvenile arthritis, unspecified, other specified site
- vertebra M08.98 — Juvenile arthritis, unspecified, vertebrae
- specified type NEC M08.80 — Other juvenile arthritis, unspecified site
- ankle M08.87 — Other juvenile arthritis, ankle and foot
- elbow M08.82 — Other juvenile arthritis, elbow
- foot joint M08.87 — Other juvenile arthritis, ankle and foot
- hand joint M08.84 — Other juvenile arthritis, hand
- hip M08.85 — Other juvenile arthritis, hip
- knee M08.86 — Other juvenile arthritis, knee
- multiple site M08.89 — Other juvenile arthritis, multiple sites
- shoulder M08.81 — Other juvenile arthritis, shoulder
- specified joint NEC M08.88 — Other juvenile arthritis, other specified site
- vertebrae M08.88 — Other juvenile arthritis, other specified site
- wrist M08.83 — Other juvenile arthritis, wrist
- wrist M08.93 — Juvenile arthritis, unspecified, wrist
Common questions about juvenile arthritis ICD-10 codes
What is the ICD-10 code for juvenile arthritis?
- M08.90 — Juvenile arthritis, unspecified, unspecified site. More specific codes apply when the documentation supports them: M08.97, M08.92, M08.97, M08.94 and others below.
What is the ICD-10 code for ankle juvenile arthritis?
- M08.97 — Juvenile arthritis, unspecified, ankle and foot (header code; choose a more specific subcode).
What is the ICD-10 code for elbow juvenile arthritis?
- M08.92 — Juvenile arthritis, unspecified, elbow (header code; choose a more specific subcode).
What is the ICD-10 code for foot joint juvenile arthritis?
- M08.97 — Juvenile arthritis, unspecified, ankle and foot (header code; choose a more specific subcode).
What is the ICD-10 code for hand joint juvenile arthritis?
- M08.94 — Juvenile arthritis, unspecified, hand (header code; choose a more specific subcode).
What is the ICD-10 code for hip juvenile arthritis?
- M08.95 — Juvenile arthritis, unspecified, hip (header code; choose a more specific subcode).
What is the ICD-10 code for knee juvenile arthritis?
- M08.96 — Juvenile arthritis, unspecified, knee (header code; choose a more specific subcode).
Is M08.90 billable?
- Yes. M08.90 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M08.90 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M08.90 as a principal diagnosis.
Is M08.90 a CC or MCC?
- No. M08.90 is neither a CC nor an MCC under MS-DRG v44.0.