ICD-10-CM › M00-M99 › M80-M85 › M85.4 Solitary bone cyst › M85.43

M85.43

Solitary bone cyst, ulna and radius

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:

  • M85.431 Solitary bone cyst, right ulna and radius
  • M85.432 Solitary bone cyst, left ulna and radius
  • M85.439 Solitary bone cyst, unspecified ulna and radius

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 Solitary bone cyst, ulna and radius

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 M85 Other disorders of bone density and structure

Excludes1 - never coded here

  • osteogenesis imperfecta (Q78.0)
  • osteopetrosis (Q78.2)
  • osteopoikilosis (Q78.8)
  • polyostotic fibrous dysplasia (Q78.1)

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
M85.40 Solitary bone cyst, unspecified site Valid
M85.41 Solitary bone cyst, shoulder Not billable
M85.42 Solitary bone cyst, humerus Not billable
M85.44 Solitary bone cyst, hand Not billable
M85.45 Solitary bone cyst, pelvis Not billable
M85.46 Solitary bone cyst, tibia and fibula Not billable
M85.47 Solitary bone cyst, ankle and foot Not billable
M85.48 Solitary bone cyst, other site Valid