M18.5 is the authoritative medical code for Other unilateral secondary osteoarthritis of first carpometacarpal joint. This classification is used in medical billing and clinical recording to specify the clinical criteria for other unilateral secondary osteoarthritis of first carpometacarpal joint (ICD-10-CM M18.5), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Sequencing, inclusion, and exclusion notes published for M18.5 in the official ICD-10-CM tabular list.
Alternative terms the tabular list files under this code.
Conditions not covered by this code, but which may be reported alongside it when both are present.
No. M18.5 (Other unilateral secondary osteoarthritis of first carpometacarpal joint) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Per Excludes2 instructions, M18.5 and the following may both be reported when both are present: osteoarthritis of spine (M47.-).
Other unilateral secondary osteoarthritis of first carpometacarpal joint includes: Secondary osteoarthritis of first carpometacarpal joint NOS.
Official ICD-10-CM classifications in the same code family as M18.5, with their registry titles.
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures: