ICD-10-CM › C00-D49 › C43-C44 › C codes › C4A

C4A

Merkel cell carcinoma

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 10 more specific codes instead:

  • C4A.0 Merkel cell carcinoma of lip
  • C4A.1 Merkel cell carcinoma of eyelid, including canthus (also a header)
  • C4A.2 Merkel cell carcinoma of ear and external auricular canal (also a header)
  • C4A.3 Merkel cell carcinoma of other and unspecified parts of face (also a header)
  • C4A.4 Merkel cell carcinoma of scalp and neck
  • C4A.5 Merkel cell carcinoma of trunk (also a header)
  • C4A.6 Merkel cell carcinoma of upper limb, including shoulder (also a header)
  • C4A.7 Merkel cell carcinoma of lower limb, including hip (also a header)
  • C4A.8 Merkel cell carcinoma of overlapping sites
  • C4A.9 Merkel cell carcinoma, unspecified

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 Merkel cell carcinoma