C50.21 — Malignant neoplasm of upper-inner quadrant of breast, female
Is C50.21 billable?
No — C50.21 is a non-billable header code. C50.21 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 3 billable codes beneath C50.21.
C50.21 at a glance
| Code | C50.21 |
|---|---|
| Description | Malignant neoplasm of upper-inner quadrant of breast, female |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together — inherited from C50
The conditions below can never be reported together with C50.21 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Use additional code — inherited from C50
Report an additional code alongside C50.21 to fully describe the condition. C50.21 is sequenced first.
- code to identify estrogen, and other hormones and factors receptor status (Z17.-)
What codes fall under C50.21? (3)
How long has C50.21 existed?
C50.21 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.