C44.521 — Squamous cell carcinoma of skin of breast
Is C44.521 billable?
Yes — C44.521 is billable for FY2027. C44.521 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. C44.521 may be submitted for encounters from October 1, 2026 through September 30, 2027.
C44.521 at a glance
| Code | C44.521 |
|---|---|
| Description | Squamous cell carcinoma of skin of breast |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does C44.521 group to?
C44.521 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.
- 606Minor Skin Disorders with MCCmedical
- 607Minor Skin Disorders without MCCmedical
Excludes1 — never code together — inherited from C44
The conditions below can never be reported together with C44.521 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes1 — never code together — inherited from C44.5
The conditions below can never be reported together with C44.521 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
How long has C44.521 existed?
C44.521 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.