2024 ICD-10-CM Diagnosis Code N61.21

Granulomatous mastitis, right breast

ICD-10-CM Code:
ICD-10 Code for:
Granulomatous mastitis, right breast
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Code Navigator:

Code Classification

  • Diseases of the genitourinary system
    • Disorders of breast
      • Inflammatory disorders of breast

N61.21 is a billable diagnosis code used to specify a medical diagnosis of granulomatous mastitis, right breast. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Granulomatous mastitis
  • Granulomatous mastitis of right breast

Clinical Classification

Clinical Information

  • Granulomatous Mastitis

    a rare, benign, inflammatory breast disease occurring in premenopausal women shortly after a recent pregnancy. the origin is unknown but it is commonly mistaken for malignancy and sometimes associated with breast feeding and the use of oral contraceptives.

Replacement Code

N6121 replaces the following previously assigned ICD-10-CM code(s):

  • N61.0 - Mastitis without abscess

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - Code Added, effective from 10/1/2020 through 9/30/2021


[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.