M19.21 (Secondary osteoarthritis, shoulder) is an umbrella ICD-10-CM medical diagnosis code in the Diseases of the musculoskeletal system and connective tissue chapter. It identifies cases of secondary osteoarthritis, shoulder for clinical documentation, billing and epidemiological tracking.

ICD-10-CM · Category

M19.21 — Secondary osteoarthritis, shoulder

Chapter M00-M99: Diseases of the musculoskeletal system and connective tissue

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Sub-codes under M19.21

M19.211Secondary osteoarthritis, right shoulderM19.212Secondary osteoarthritis, left shoulderM19.219Secondary osteoarthritis, unspecified shoulder

Related diagnoses

M19.22Secondary osteoarthritis, elbowM19.23Secondary osteoarthritis, wristM19.24Secondary osteoarthritis, handM19.27Secondary osteoarthritis, ankle and footM19.29Secondary osteoarthritis, other specified site

Common questions about M19.21 (Secondary osteoarthritis, shoulder)

What does ICD-10 code M19.21 mean?
M19.21 is the ICD-10-CM 2025 code for Secondary osteoarthritis, shoulder. ICD-10-CM is the medical coding system used by clinicians, hospitals and insurers worldwide to classify diseases and conditions in a standard way.
Is M19.21 a billable diagnosis code?
M19.21 is a category-level (umbrella) code rather than a billable specific code. For billing purposes, clinicians typically use a more specific sub-code under M19.21. Browse the sub-codes listed on this page.
Which ICD-10 chapter does M19.21 belong to?
M19.21 belongs to the chapter "Diseases of the musculoskeletal system and connective tissue" (codes M00-M99). ICD-10-CM organises codes into 22 chapters by body system or condition type, which helps clinicians navigate related diagnoses.
Where can I get plain-language information about Secondary osteoarthritis, shoulder?
For a plain-language explanation of Secondary osteoarthritis, shoulder, ask GoDavaii's Health AI - it explains medical conditions in 22+ Indian languages, free, with no signup. Tap "Ask GoDavaii AI about Secondary osteoarthritis, shoulder" above to get a personalised answer.

Source: ICD-10-CM 2025 (Centers for Medicare & Medicaid Services, public domain). Codes valid from October 1, 2024. CMS source ↗