ICD-10-CM › C00-D49 › C43-C44 › C4A Merkel cell carcinoma › C4A.4
C4A.4
Merkel cell carcinoma of scalp and neck
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
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 scalp and neck
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 > neck
- Carcinoma > Merkel cell > scalp
Codes in the same group
| Code | Description | Status |
|---|---|---|
| C4A.0 | Merkel cell carcinoma of lip | Valid |
| C4A.1 | Merkel cell carcinoma of eyelid, including canthus | Not billable |
| C4A.2 | Merkel cell carcinoma of ear and external auricular canal | Not billable |
| C4A.3 | Merkel cell carcinoma of other and unspecified parts of face | Not billable |
| C4A.5 | Merkel cell carcinoma of trunk | Not billable |
| C4A.6 | Merkel cell carcinoma of upper limb, including shoulder | Not billable |
| C4A.7 | Merkel cell carcinoma of lower limb, including hip | Not billable |
| C4A.8 | Merkel cell carcinoma of overlapping sites | Valid |
| C4A.9 | Merkel cell carcinoma, unspecified | Valid |