ICD-10-CM 2027
ICD-10 code for secondary osteoarthritis
From the official ICD-10-CM alphabetic index entry “Osteoarthritis › secondary”. Page updated September 29, 2026.
About coding secondary osteoarthritis
The ICD-10-CM code for secondary osteoarthritis is M19.93 (Secondary osteoarthritis, unspecified site). The official index lists 14 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on M19.93.
Within M19.9, choose M19.93 (Secondary osteoarthritis, unspecified site) only when documentation doesn't support a more specific option: unspecified osteoarthritis, unspecified site (M19.90), primary osteoarthritis, unspecified site (M19.91) and post-traumatic osteoarthritis, unspecified site (M19.92).
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 secondary osteoarthritis codes (official index)
- 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
Common questions about secondary osteoarthritis ICD-10 codes
What is the ICD-10 code for secondary osteoarthritis?
- M19.93 — Secondary osteoarthritis, unspecified site. More specific codes apply when the documentation supports them: M19.27, M19.22, M19.27, M19.24 and others below.
What is the ICD-10 code for ankle secondary osteoarthritis?
- M19.27 — Secondary osteoarthritis, ankle and foot (header code; choose a more specific subcode).
What is the ICD-10 code for elbow secondary osteoarthritis?
- M19.22 — Secondary osteoarthritis, elbow (header code; choose a more specific subcode).
What is the ICD-10 code for foot joint secondary osteoarthritis?
- M19.27 — Secondary osteoarthritis, ankle and foot (header code; choose a more specific subcode).
What is the ICD-10 code for hand joint secondary osteoarthritis?
- M19.24 — Secondary osteoarthritis, hand (header code; choose a more specific subcode).
What is the ICD-10 code for hip secondary osteoarthritis?
- M16.7 — Other unilateral secondary osteoarthritis of hip.
What is the ICD-10 code for knee secondary osteoarthritis?
- M17.5 — Other unilateral secondary osteoarthritis of knee.
Is M19.93 billable?
- Yes. M19.93 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M19.93 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M19.93 as a principal diagnosis.
Is M19.93 a CC or MCC?
- No. M19.93 is neither a CC nor an MCC under MS-DRG v44.0.