Unilateral primary osteoarth of first carpometacarp joint
Unilateral primary osteoarthritis of first carpometacarpal joint
M18.1 is a header (parent) code in the ICD-10-CM hierarchy. It is not billable for claim submission. Use one of the billable child codes listed below.
Billable codes in this category
Each of the codes below is billable. Choose the one that most accurately describes the patient's diagnosis.
Primary degenerative osteoarthritis of the first carpometacarpal (CMC) joint affecting one hand, with the specific side (right or left) not documented in the medical record.
M18.11 identifies degenerative joint disease affecting the right first carpometacarpal (CMC) joint — the basal thumb joint — arising from primary (idiopathic) wear rather than a secondary cause such as trauma or inflammatory arthritis.
Primary (degenerative) osteoarthritis isolated to the first carpometacarpal joint of the left hand, with no traumatic or secondary etiology documented.
Inclusion & exclusion notes
Includes
- Primary osteoarthritis of first carpometacarpal joint NOS