ICD-10-CM 2027
ICD-10 code for osteoarthritis
From the official ICD-10-CM alphabetic index entry “Osteoarthritis”. Page updated September 29, 2026.
About coding osteoarthritis
The ICD-10-CM code for osteoarthritis is M19.90 (Unspecified osteoarthritis, unspecified site). The official index lists 100 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on M19.90.
Within M19.9, choose M19.90 (Unspecified osteoarthritis, unspecified site) only when documentation doesn't support a more specific option: primary osteoarthritis, unspecified site (M19.91), post-traumatic osteoarthritis, unspecified site (M19.92) and secondary osteoarthritis, unspecified site (M19.93).
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 553 (Bone Diseases and Arthropathies with MCC, relative weight 1.2494) and DRG 554 (Bone Diseases and Arthropathies without MCC, relative weight 0.8331), 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 osteoarthritis codes (official index)
- ankle M19.07 — Primary osteoarthritis ankle and foot
- post-traumatic M19.17 — Post-traumatic osteoarthritis, ankle and foot
- primary M19.07 — Primary osteoarthritis ankle and foot
- secondary M19.27 — Secondary osteoarthritis, ankle and foot
- elbow M19.02 — Primary osteoarthritis, elbow
- post-traumatic M19.12 — Post-traumatic osteoarthritis, elbow
- primary M19.02 — Primary osteoarthritis, elbow
- secondary M19.22 — Secondary osteoarthritis, elbow
- foot joint M19.07 — Primary osteoarthritis ankle and foot
- post-traumatic M19.17 — Post-traumatic osteoarthritis, ankle and foot
- primary M19.07 — Primary osteoarthritis ankle and foot
- secondary M19.27 — Secondary osteoarthritis, ankle and foot
- generalized (multiple joints) M15.9 — Polyosteoarthritis, unspecified
- erosive M15.4 — Erosive (osteo)arthritis
- primary M15.0 — Primary generalized (osteo)arthritis
- specified NEC M15.8 — Other polyosteoarthritis
- hand joint M19.04 — Primary osteoarthritis, hand
- first carpometacarpal joint M18.9 — Osteoarthritis of first carpometacarpal joint, unspecified
- post-traumatic
- primary
- secondary
- post-traumatic M19.14 — Post-traumatic osteoarthritis, hand
- primary M19.04 — Primary osteoarthritis, hand
- secondary M19.24 — Secondary osteoarthritis, hand
- hip M16.9 — Osteoarthritis of hip, unspecified
- bilateral M16.0 — Bilateral primary osteoarthritis of hip
- due to hip dysplasia M16.2 — Bilateral osteoarthritis resulting from hip dysplasia
- post-traumatic M16.4 — Bilateral post-traumatic osteoarthritis of hip
- secondary M16.6 — Other bilateral secondary osteoarthritis of hip
- due to hip dysplasia (unilateral) M16.3 — Unilateral osteoarthritis resulting from hip dysplasia
- bilateral M16.2 — Bilateral osteoarthritis resulting from hip dysplasia
- post-traumatic
- primary M16.1 — Unilateral primary osteoarthritis of hip
- bilateral M16.0 — Bilateral primary osteoarthritis of hip
- secondary
- unilateral M16.1 — Unilateral primary osteoarthritis of hip
- due to hip dysplasia M16.3 — Unilateral osteoarthritis resulting from hip dysplasia
- post-traumatic M16.5 — Unilateral post-traumatic osteoarthritis of hip
- primary M16.1 — Unilateral primary osteoarthritis of hip
- secondary NEC M16.7 — Other unilateral secondary osteoarthritis of hip
- interphalangeal
- distal (Heberden) M15.1 — Heberden's nodes (with arthropathy)
- proximal (Bouchard) M15.2 — Bouchard's nodes (with arthropathy)
- knee M17.9 — Osteoarthritis of knee, unspecified
- bilateral M17.0 — Bilateral primary osteoarthritis of knee
- post-traumatic M17.2 — Bilateral post-traumatic osteoarthritis of knee
- secondary M17.4 — Other bilateral secondary osteoarthritis of knee
- post-traumatic
- primary M17.1 — Unilateral primary osteoarthritis of knee
- bilateral M17.0 — Bilateral primary osteoarthritis of knee
- secondary
- unilateral M17.1 — Unilateral primary osteoarthritis of knee
- post-traumatic M17.3 — Unilateral post-traumatic osteoarthritis of knee
- primary M17.1 — Unilateral primary osteoarthritis of knee
- secondary NEC M17.5 — Other unilateral secondary osteoarthritis of knee
- post-traumatic NEC M19.92 — Post-traumatic osteoarthritis, unspecified site
- ankle M19.17 — Post-traumatic osteoarthritis, ankle and foot
- elbow M19.12 — Post-traumatic osteoarthritis, elbow
- foot joint M19.17 — Post-traumatic osteoarthritis, ankle and foot
- hand joint M19.14 — Post-traumatic osteoarthritis, hand
- first carpometacarpal joint M18.3 — Unilateral post-traumatic osteoarthritis of first carpometacarpal joint
- bilateral M18.2 — Bilateral post-traumatic osteoarthritis of first carpometacarpal joints
- hip M16.5 — Unilateral post-traumatic osteoarthritis of hip
- bilateral M16.4 — Bilateral post-traumatic osteoarthritis of hip
- knee M17.3 — Unilateral post-traumatic osteoarthritis of knee
- bilateral M17.2 — Bilateral post-traumatic osteoarthritis of knee
- shoulder M19.11 — Post-traumatic osteoarthritis, shoulder
- specified site NEC M19.19 — Post-traumatic osteoarthritis, other specified site
- wrist M19.13 — Post-traumatic osteoarthritis, wrist
- primary M19.91 — Primary osteoarthritis, unspecified site
- ankle M19.07 — Primary osteoarthritis ankle and foot
- elbow M19.02 — Primary osteoarthritis, elbow
- foot joint M19.07 — Primary osteoarthritis ankle and foot
- hand joint M19.04 — Primary osteoarthritis, hand
- first carpometacarpal joint M18.1 — Unilateral primary osteoarthritis of first carpometacarpal joint
- bilateral M18.0 — Bilateral primary osteoarthritis of first carpometacarpal joints
- hip M16.1 — Unilateral primary osteoarthritis of hip
- bilateral M16.0 — Bilateral primary osteoarthritis of hip
- knee M17.1 — Unilateral primary osteoarthritis of knee
- bilateral M17.0 — Bilateral primary osteoarthritis of knee
- multiple sites M15.9 — Polyosteoarthritis, unspecified
- shoulder M19.01 — Primary osteoarthritis, shoulder
- specified site NEC M19.09 — Primary osteoarthritis, other specified site
- spine
- wrist M19.03 — Primary osteoarthritis, wrist
- secondary M19.93 — Secondary osteoarthritis, unspecified site
- ankle M19.27 — Secondary osteoarthritis, ankle and foot
- elbow M19.22 — Secondary osteoarthritis, elbow
- foot joint M19.27 — Secondary osteoarthritis, ankle and foot
- hand joint M19.24 — Secondary osteoarthritis, hand
- first carpometacarpal joint M18.5 — Other unilateral secondary osteoarthritis of first carpometacarpal joint
- bilateral M18.4 — Other bilateral secondary osteoarthritis of first carpometacarpal joints
- hip M16.7 — Other unilateral secondary osteoarthritis of hip
- bilateral M16.6 — Other bilateral secondary osteoarthritis of hip
- knee M17.5 — Other unilateral secondary osteoarthritis of knee
- bilateral M17.4 — Other bilateral secondary osteoarthritis of knee
- multiple M15.3 — Secondary multiple arthritis
- shoulder M19.21 — Secondary osteoarthritis, shoulder
- specified site NEC M19.29 — Secondary osteoarthritis, other specified site
- spine
- wrist M19.23 — Secondary osteoarthritis, wrist
- shoulder M19.01 — Primary osteoarthritis, shoulder
- post-traumatic M19.11 — Post-traumatic osteoarthritis, shoulder
- primary M19.01 — Primary osteoarthritis, shoulder
- secondary M19.21 — Secondary osteoarthritis, shoulder
- specified site NEC M19.09 — Primary osteoarthritis, other specified site
- spine
- wrist M19.03 — Primary osteoarthritis, wrist
- first carpometacarpal joint
- post-traumatic M19.13 — Post-traumatic osteoarthritis, wrist
- primary M19.03 — Primary osteoarthritis, wrist
- secondary M19.23 — Secondary osteoarthritis, wrist
Common questions about osteoarthritis ICD-10 codes
What is the ICD-10 code for osteoarthritis?
- M19.90 — Unspecified osteoarthritis, unspecified site. More specific codes apply when the documentation supports them: M19.07, M19.17, M19.07, M19.27 and others below.
What is the ICD-10 code for ankle osteoarthritis?
- M19.07 — Primary osteoarthritis ankle and foot (header code; choose a more specific subcode).
What is the ICD-10 code for elbow osteoarthritis?
- M19.02 — Primary osteoarthritis, elbow (header code; choose a more specific subcode).
What is the ICD-10 code for foot joint osteoarthritis?
- M19.07 — Primary osteoarthritis ankle and foot (header code; choose a more specific subcode).
What is the ICD-10 code for generalized osteoarthritis?
- M15.9 — Polyosteoarthritis, unspecified.
What is the ICD-10 code for hand joint osteoarthritis?
- M19.04 — Primary osteoarthritis, hand (header code; choose a more specific subcode).
What is the ICD-10 code for hip osteoarthritis?
- M16.9 — Osteoarthritis of hip, unspecified.
Is M19.90 billable?
- Yes. M19.90 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M19.90 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M19.90 as a principal diagnosis.
Is M19.90 a CC or MCC?
- No. M19.90 is neither a CC nor an MCC under MS-DRG v44.0.