M18.3 vs M19.14

M18.3 (Unilateral post-traumatic osteoarthritis of first carpometacarpal joint) compared with M19.14 (Post-traumatic osteoarthritis, hand), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).

Can these codes be reported together?

Yes, when both are documented. M19.14 carries an Excludes2 note covering M18.3: “post-traumatic osteoarthritis of first carpometacarpal joint (M18.2-, M18.3-)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

Side by side

	M18.3Unilateral post-traumatic osteoarthritis of first carpometacarpal joint	M19.14Post-traumatic osteoarthritis, hand
Billing status	Non-billable header Report instead: M18.30, M18.31, M18.32	Non-billable header Report instead: M19.141, M19.142, M19.149
Classification	M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99)	M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99)
Definition	Unilateral post-traumatic osteoarthritis of first carpometacarpal joint is a non-billable ICD-10-CM category code (M18.3).	Post-traumatic osteoarthritis, hand is a non-billable ICD-10-CM category code (M19.14).
Includes	Post-traumatic osteoarthritis of first carpometacarpal joint NOS	—

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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources