M18 Osteoarthritis of first carpometacarpal joint

Non-billable header with 7 child codes.

Codes under M18

• M18.0 Bilateral primary osteoarthritis of first carpometacarpal joints
• M18.1 Unilateral primary osteoarthritis of first carpometacarpal joint
• M18.2 Bilateral post-traumatic osteoarthritis of first carpometacarpal joints
• M18.3 Unilateral post-traumatic osteoarthritis of first carpometacarpal joint
• M18.4 Other bilateral secondary osteoarthritis of first carpometacarpal joints
• M18.5 Other unilateral secondary osteoarthritis of first carpometacarpal joint
• M18.9 Osteoarthritis of first carpometacarpal joint, unspecified

Code annotations containing back-references to M18

Back-references to M18

• Type 1 Excludes: M12 Other and unspecified arthropathy ("arthrosis (M15-M19)")
• Type 1 Excludes: M13 Other arthritis ("arthrosis (M15-M19)")
• Type 1 Excludes: M13 Other arthritis ("osteoarthritis (M15-M19)")
• Type 1 Excludes: M13.8 Other specified arthritis ("osteoarthritis (M15-M19)")
• Type 1 Excludes: M15 Polyosteoarthritis ("bilateral involvement of single joint (M16-M19)")

Back-references to M18

• Type 1 Excludes: M12 Other and unspecified arthropathy ("arthrosis (M15-M19)")
• Type 1 Excludes: M13 Other arthritis ("arthrosis (M15-M19)")
• Type 1 Excludes: M13 Other arthritis ("osteoarthritis (M15-M19)")
• Type 1 Excludes: M13.8 Other specified arthritis ("osteoarthritis (M15-M19)")
• Type 1 Excludes: M15 Polyosteoarthritis ("bilateral involvement of single joint (M16-M19)")

Nearby codes

• M18 Osteoarthritis of first carpometacarpal joint (this code)
• M18.0 Bilateral primary osteoarthritis of first carpometacarpal joints
• M18.1 Unilateral primary osteoarthritis of first carpometacarpal joint
• M18.10 Unilateral primary osteoarthritis of first carpometacarpal joint, unspecified hand
• M18.11 Unilateral primary osteoarthritis of first carpometacarpal joint, right hand
• M18.12 Unilateral primary osteoarthritis of first carpometacarpal joint, left hand