ICD-10-CM › C00-D49 › C43-C44 › C44.50 Unspecified malignant neoplasm of... › C44.501
Unspecified malignant neoplasm of skin of breast
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 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 Unspecified malignant neoplasm of skin 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 C44 Other and unspecified malignant neoplasm of skin
Excludes1 - never coded here
- Kaposi's sarcoma of skin (C46.0)
- malignant melanoma of skin (C43.-)
- malignant neoplasm of skin of genital organs (C51-C52, C60.-, C63.2)
- Merkel cell carcinoma (C4A.-)
Includes
- malignant neoplasm of sebaceous glands
- malignant neoplasm of sweat glands
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
- Neoplasm, neoplastic > mastectomy site
- Carcinoma > duct > with Paget's disease
- Paget's disease > intraductal carcinoma
- Carcinoma > intraductal > with Paget's disease
- Neoplasm, neoplastic > breast > mastectomy site
- 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 > skin
- Neoplasm, neoplastic > mastectomy site
- Neoplasm, neoplastic > skin NOS > breast
- Neoplasm, neoplastic > breast > mastectomy site
- Neoplasm, neoplastic > skin NOS > mastectomy site
Codes in the same group
| Code | Description | Status |
|---|---|---|
| C44.500 | Unspecified malignant neoplasm of anal skin | Valid |
| C44.509 | Unspecified malignant neoplasm of skin of other part of trunk | Valid |