ICD-10-CM › M00-M99 › M15-M19 › M17 Osteoarthritis of knee › M17.1

M17.1

Unilateral primary osteoarthritis of knee

Not billableICD-10-CM diagnosis code.

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2016 onwards. It has never been valid for submission on its own.

Submit one of these 3 more specific codes instead:

  • M17.10 Unilateral primary osteoarthritis, unspecified knee
  • M17.11 Unilateral primary osteoarthritis, right knee
  • M17.12 Unilateral primary osteoarthritis, left knee

What has happened to this code

Every change the publisher made, from 2012 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

  1. FY2012 Added to the draft code set draft Unilateral primary osteoarthritis of knee

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from the M15-M19 section Osteoarthritis (M15-M19)

Excludes2 - not included here

  • osteoarthritis of spine (M47.-)

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

Codes in the same group

CodeDescriptionStatus
M17.0 Bilateral primary osteoarthritis of knee Valid
M17.2 Bilateral post-traumatic osteoarthritis of knee Valid
M17.3 Unilateral post-traumatic osteoarthritis of knee Not billable
M17.4 Other bilateral secondary osteoarthritis of knee Valid
M17.5 Other unilateral secondary osteoarthritis of knee Valid
M17.9 Osteoarthritis of knee, unspecified Valid