N61.20
Granulomatous mastitis, unspecified breast
BillableComplete code, valid to report
N61.20 (also written N6120) is a billable ICD-10-CM diagnosis code for granulomatous mastitis, unspecified breast. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 6 codes in category N61 (Inflammatory disorders of breast). Its coding notes include 5 Excludes1 entries and 8 Excludes2 entries.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Inherited from N61 Inflammatory disorders of breast
Also from chapter/block level (1 note)
Inherited from N60–N65 Disorders of breast
- disorders of breast associated with childbirth (O91-O92)
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (8 notes)
Inherited from Chapter 14 Diseases of the genitourinary system
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)