ICD-10-CM › A00-B99 › B25-B34 › B codes › B27

B27

Infectious mononucleosis

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 4 more specific codes instead:

  • B27.0 Gammaherpesviral mononucleosis (also a header)
  • B27.1 Cytomegaloviral mononucleosis (also a header)
  • B27.8 Other infectious mononucleosis (also a header)
  • B27.9 Infectious mononucleosis, unspecified (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 Infectious mononucleosis

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

Includes

  • glandular fever
  • monocytic angina
  • Pfeiffer's disease