ICD-10-CM › M00-M99 › M45-M49 › M codes › M45

M45

Ankylosing spondylitis

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 11 more specific codes instead:

  • M45.0 Ankylosing spondylitis of multiple sites in spine
  • M45.1 Ankylosing spondylitis of occipito-atlanto-axial region
  • M45.2 Ankylosing spondylitis of cervical region
  • M45.3 Ankylosing spondylitis of cervicothoracic region
  • M45.4 Ankylosing spondylitis of thoracic region
  • M45.5 Ankylosing spondylitis of thoracolumbar region
  • M45.6 Ankylosing spondylitis lumbar region
  • M45.7 Ankylosing spondylitis of lumbosacral region
  • M45.8 Ankylosing spondylitis sacral and sacrococcygeal region
  • M45.9 Ankylosing spondylitis of unspecified sites in spine
  • M45.A Non-radiographic axial spondyloarthritis (also a header)

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 Ankylosing spondylitis

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.

This code

Excludes1 - never coded here

  • arthropathy in Reiter's disease (M02.3-)
  • juvenile (ankylosing) spondylitis (M08.1)

Excludes2 - not included here

  • Behçet's disease (M35.2)

Also known as

  • Rheumatoid arthritis of spine