ICD-10-CM 2027
ICD-10 code for osteoarthropathy
From the official ICD-10-CM alphabetic index entry “Osteoarthropathy (hypertrophic)”. Page updated September 29, 2026.
About coding osteoarthropathy
The ICD-10-CM code for osteoarthropathy is M19.90 (Unspecified osteoarthritis, unspecified site). The official index lists 23 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 osteoarthropathy codes (official index)
- ankle
- elbow
- foot joint
- hand joint
- knee joint
- multiple site
- pulmonary
- hypertrophic
- secondary hypertrophic
- shoulder
- specified joint NEC
- specified type NEC M89.40 — Other hypertrophic osteoarthropathy, unspecified site
- carpus M89.44 — Other hypertrophic osteoarthropathy, hand
- clavicle M89.41 — Other hypertrophic osteoarthropathy, shoulder
- femur M89.45 — Other hypertrophic osteoarthropathy, thigh
- fibula M89.46 — Other hypertrophic osteoarthropathy, lower leg
- finger M89.44 — Other hypertrophic osteoarthropathy, hand
- humerus M89.42 — Other hypertrophic osteoarthropathy, upper arm
- ilium M89.48 — Other hypertrophic osteoarthropathy, other site
- ischium M89.48 — Other hypertrophic osteoarthropathy, other site
- metacarpus M89.44 — Other hypertrophic osteoarthropathy, hand
- metatarsus M89.47 — Other hypertrophic osteoarthropathy, ankle and foot
- multiple sites M89.49 — Other hypertrophic osteoarthropathy, multiple sites
- neck M89.48 — Other hypertrophic osteoarthropathy, other site
- pubic ramus [pubis] M89.48 — Other hypertrophic osteoarthropathy, other site
- radius M89.43 — Other hypertrophic osteoarthropathy, forearm
- rib M89.48 — Other hypertrophic osteoarthropathy, other site
- scapula M89.41 — Other hypertrophic osteoarthropathy, shoulder
- skull M89.48 — Other hypertrophic osteoarthropathy, other site
- tarsus M89.47 — Other hypertrophic osteoarthropathy, ankle and foot
- tibia M89.46 — Other hypertrophic osteoarthropathy, lower leg
- toe M89.47 — Other hypertrophic osteoarthropathy, ankle and foot
- ulna M89.43 — Other hypertrophic osteoarthropathy, forearm
- vertebra M89.48 — Other hypertrophic osteoarthropathy, other site
- secondary
- spine
- wrist
Common questions about osteoarthropathy ICD-10 codes
What is the ICD-10 code for osteoarthropathy?
- M19.90 — Unspecified osteoarthritis, unspecified site. More specific codes apply when the documentation supports them: M89.40, M89.44, M89.41, M89.45 and others below.
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.