Merkel cell carcinoma of left eyelid, including canthus

Not billableICD-10-CM diagnosis code.

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

Billable FY2016 to FY2018, and a category header from FY2019.

Submit one of these 2 more specific codes instead:

C4A.121 Merkel cell carcinoma of left upper eyelid, including canthus
C4A.122 Merkel cell carcinoma of left lower eyelid, including canthus

What has happened to this code

Every change the publisher made, from 2010 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.

FY2010 Added to the draft code set draft Merkel cell carcinoma of left eyelid, including canthus
FY2019 Stopped being billable

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.

Merkel cell tumor
Tumor > Merkel cell
Carcinoma > Merkel cell > canthus
Carcinoma > Merkel cell > eyelid, including canthus

Codes in the same group

Code	Description	Status
C4A.10	Merkel cell carcinoma of unspecified eyelid, including canthus	Valid
C4A.11	Merkel cell carcinoma of right eyelid, including canthus	Not billable