Malignant inflammatory neoplasm of right breast

ValidICD-10-CM diagnosis code.

Valid for claims with a date of service in the current code year.

Valid FY2026 onwards.

What has happened to this code

Every change the publisher made, from 2026 to now.

FY2026 Added to the code set Malignant inflammatory neoplasm of right 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 > inflammatory

Codes in the same group

Code	Description	Status
C50.A0	Malignant inflammatory neoplasm of unspecified breast	Valid
C50.A2	Malignant inflammatory neoplasm of left breast	Valid