M19.91

✓ Billable

Primary osteoarthritis, unspecified site

Diseases of the musculoskeletal system and connective tissue (M00-M99)

Also Known As

Primary osteoarthritis NOS

✅ No additional coding notes for M19.91

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Code Information

CodeM19.91

BillableYes

ParentM19.9

CategoryDiseases of the musculoskeletal system and connective tissue (M00-M99)

Excludes10 rule(s)

Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)