N61.21 – Granulomatous mastitis, right breast

ICD-10-CM 2027 diagnosis code · Disorders of breast

Billable code

ICD-10-CM code N61.21
Code
N61.21 (claims format: N6121)
Description
Granulomatous mastitis, right breast
Billable
Yes – valid for HIPAA-covered transactions
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
14. Diseases of the genitourinary system (N00-N99)
Block
N60-N65 Disorders of breast
Parent codes
N61 › N61.2

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

N61 – Inflammatory disorders of breast

Excludes1 (not coded here):
  • inflammatory carcinoma of breast (C50.A-)
  • inflammatory disorder of breast associated with childbirth (O91.-)
  • neonatal infective mastitis (P39.0)
  • thrombophlebitis of breast [Mondor's disease] (I80.8)

Block N60-N65

Excludes1 (not coded here):
  • disorders of breast associated with childbirth (O91-O92)

Related codes in N61.2

Frequently asked questions

What is ICD-10 code N61.21?

N61.21 is the ICD-10-CM code for granulomatous mastitis, right breast, in the block N60-N65 (Disorders of breast).

Is N61.21 a billable code?

Yes. N61.21 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does N61.21 belong to?

It belongs to category N61 – Inflammatory disorders of breast.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.