Osteoarthritis of first carpometacarpal joint
Non-billable header
M18 is a non-billable header code. Use one of the more specific codes below.
Inclusion terms
Includes
- Note: Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
Excludes2
Not included here — may be reported together when both conditions exist.
- arthropathic psoriasis (L40.5-)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- compartment syndrome (traumatic) (T79.A-)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- osteoarthritis of spine (M47.-)
More specific codes M18
- M18.0Bilateral primary osteoarthritis of first carpometacarpal jointsBillable
- M18.1Unilateral primary osteoarthritis of first carpometacarpal jointHeader
- M18.2Bilateral post-traumatic osteoarthritis of first carpometacarpal jointsBillable
- M18.3Unilateral post-traumatic osteoarthritis of first carpometacarpal jointHeader
- M18.4Other bilateral secondary osteoarthritis of first carpometacarpal jointsBillable
- M18.5Other unilateral secondary osteoarthritis of first carpometacarpal jointHeader
- M18.9Osteoarthritis of first carpometacarpal joint, unspecifiedBillable