ICD-10-CM › C00-D49 › C50 › C50 Malignant neoplasm of breast › C50.5
Malignant neoplasm of lower-outer quadrant of breast
Not billableICD-10-CM diagnosis code.
This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.
Submit one of these 2 more specific codes instead:
What has happened to this code
Every change the publisher made, from 2012 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.
- FY2012 Added to the draft code set draft Malignant neoplasm of lower-outer quadrant of breast
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from C50 Malignant neoplasm of breast
Excludes1 - never coded here
- skin of breast (C44.501, C44.511, C44.521, C44.591)
Use additional code
- code to identify estrogen, and other hormones and factors receptor status (Z17.-)
Includes
- connective tissue of breast
- Paget's disease of breast
- Paget's disease of nipple
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.
- Cancer > breast
- Comedocarcinoma
- Carcinoma > glycogen-rich
- Carcinoma > juvenile, breast
- Carcinoma > apocrine > breast
- Carcinoma > secretory, breast
- Tumor > phyllodes > malignant
- Neoplasm, neoplastic > milk duct
- Adenocarcinoma > apocrine > breast
- Cystosarcoma phyllodes > malignant
- Neoplasm, neoplastic > mammary gland
- Carcinoma > duct > with Paget's disease
- Paget's disease > intraductal carcinoma
- Carcinoma > intraductal > with Paget's disease
- Paget's disease > with infiltrating duct carcinoma
- Neoplasm, neoplastic > connective tissue NEC > breast
- Carcinoma > infiltrating > duct > with Paget's disease
- Adenocarcinoma > infiltrating duct > with Paget's disease
- Adenocarcinoma > duct > infiltrating > with Paget's disease
- Neoplasm, neoplastic > breast > lower-outer quadrant
Codes in the same group
| Code | Description | Status |
|---|---|---|
| C50.0 | Malignant neoplasm of nipple and areola | Not billable |
| C50.1 | Malignant neoplasm of central portion of breast | Not billable |
| C50.2 | Malignant neoplasm of upper-inner quadrant of breast | Not billable |
| C50.3 | Malignant neoplasm of lower-inner quadrant of breast | Not billable |
| C50.4 | Malignant neoplasm of upper-outer quadrant of breast | Not billable |
| C50.6 | Malignant neoplasm of axillary tail of breast | Not billable |
| C50.8 | Malignant neoplasm of overlapping sites of breast | Not billable |
| C50.9 | Malignant neoplasm of breast of unspecified site | Not billable |
| C50.A | Malignant inflammatory neoplasm of breast | Not billable |