M18 is a non-billable/non-specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Osteoarthritis of first carpometacarpal joint.
Codes
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
Versions
2025
No changes
2024
No changes
2023
No changes
2022
No changes
2021
No changes
2020
No changes
2019
No changes
2018
No changes
2017
No changes
2016
New code