2026 ICD-10-CM Diagnosis Code C50.021Malignant neoplasm of nipple and areola, right male breast

ICD-10-CM Codes›C00–D49›C50›C50

ICD-10-CM C50.021
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

C50.021 is a billable ICD-10-CM diagnosis code for malignant neoplasm of nipple and areola, right male breast. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 582 through 583, 597 through 599. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Breast cancer - all other types.

Code Identity

ICD-10-CM Code
C50.021
Billable Status
Yes — Valid for Submission
Code Describes
Malignant neoplasm of nipple and areola, right male breast
Short Description
Malignant neoplasm of nipple and areola, right male breast
Same as the full description in the CMS dataset.
Parent Code
C50.02
Malignant neoplasm of nipple and areola, male

Code Classification

ChapterC00–D49Neoplasms
SectionC50Malignant neoplasms of breast
CategoryC50Malignant neoplasm of breast
This CodeC50.021Malignant neoplasm of nipple and areola, right male breast

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NEO030
Breast cancer - all other types
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Male Breast Cancer

Although breast cancer is much more common in women, men can get it too. It happens most often to men between the ages of 60 and 70.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert C50.021 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
175.0 Mal neo male nipple
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About C50.021Overview

Is C50.021 (Malignant neoplasm of nipple and areola, male) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report malignant neoplasm of nipple and areola, right male breast on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does C50.021 group to?

When malignant neoplasm of nipple and areola, right male breast is the principal diagnosis on an inpatient stay, it groups to MS-DRG 582, 583, 597, 598, 599, with relative weights from 0.7332 to 1.9266 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of C50.021?

Under the General Equivalence Mappings, malignant neoplasm of nipple and areola, right male breast converts to ICD-9-CM 175.0 (mal neo male nipple). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.