2025
ICD-10-CM
Diagnosis
Code

M18.1 Unilateral primary osteoarthritis of first carpometacarpal joint

Non-billable
2016–2025

M18.1 is a non-billable/non-specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Unilateral primary osteoarthritis of first carpometacarpal joint.

Inclusion term

Primary osteoarthritis of first carpometacarpal joint NOS

Codes

M18.10
Unilateral primary osteoarthritis of first carpometacarpal joint, unspecified hand
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M18.11
Unilateral primary osteoarthritis of first carpometacarpal joint, right hand
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M18.12
Unilateral primary osteoarthritis of first carpometacarpal joint, left hand
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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