N61.2 – Granulomatous mastitis

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

Non-billable header

ICD-10-CM code N61.2

Code: N61.2 (claims format: N612)
Description: Granulomatous mastitis
Billable: No – use a more specific code below
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

Billable codes under N61.2

N61.2 is a header code and cannot be used on claims. Choose the most specific code:

N61.20 – Granulomatous mastitis, unspecified breastBillable
N61.21 – Granulomatous mastitis, right breastBillable
N61.22 – Granulomatous mastitis, left breastBillable
N61.23 – Granulomatous mastitis, bilateral breastBillable

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)

Index terms for N61.2

Entries in the ICD-10-CM alphabetic index that lead to this code:

Mastitis, granulomatous

Related codes in N61

N61.0 – Mastitis without abscessBillable
N61.1 – Abscess of the breast and nippleBillable

Frequently asked questions

What is ICD-10 code N61.2?

N61.2 is the ICD-10-CM code for granulomatous mastitis, in the block N60-N65 (Disorders of breast).

Is N61.2 a billable code?

No. N61.2 is a header code with more specific child codes; report one of the billable codes listed above.

What category does N61.2 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.