C79.2 — Secondary malignant neoplasm of skin

BillableCC

Is C79.2 billable?

Yes — C79.2 is billable for FY2027. C79.2 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. C79.2 may be submitted for encounters from October 1, 2026 through September 30, 2027.

C79.2 at a glance

Code	C79.2
Description	Secondary malignant neoplasm of skin
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does C79.2 group to?

C79.2 sits in MDC 09 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

582Mastectomy for Malignancy with CC/MCCsurgical
583Mastectomy for Malignancy without CC/MCCsurgical

As a secondary diagnosis, C79.2 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.

Excludes1 — never code together

The conditions below can never be reported together with C79.2 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

secondary Merkel cell carcinoma (C7B.1)

Excludes1 — never code together — inherited from C79

The conditions below can never be reported together with C79.2 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

secondary carcinoid tumors (C7B.-)
secondary neuroendocrine tumors (C7B.-)

How long has C79.2 existed?

C79.2 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

Which codes are confused with C79.2?

ICD-10-CM declares these codes mutually exclusive with C79.2 — exactly one of each pair can be correct for a given encounter.

vs C7B.1Secondary Merkel cell carcinoma