N61.0 – Mastitis without abscess
ICD-10-CM 2027 diagnosis code · Disorders of breast
ICD-10-CM code
N61.0
- Code
N61.0(claims format:N610)- Description
- Mastitis without abscess
- 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
Notes for N61.0
Applicable to:
- Infective mastitis (acute) (nonpuerperal) (subacute)
- Mastitis (acute) (nonpuerperal) (subacute) NOS
- Cellulitis (acute) (nonpuerperal) (subacute) of breast NOS
- Cellulitis (acute) (nonpuerperal) (subacute) of nipple NOS
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):
Block N60-N65
Index terms for N61.0
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Mastitis
- Thelitis
- Mammillitis
- Fistula, breast
- Galactophoritis
- Fistula, mammary
- Cellulitis, breast
- Cellulitis, nipple
- Mastitis, infective
- Mastitis, without abscess
- Cellulitis, breast, nipple
- Infection, infected, infective, nipple
- Inflammation, inflamed, inflammatory, areola
- Inflammation, inflamed, inflammatory, breast
- Inflammation, inflamed, inflammatory, nipple
- Infection, infected, infective, mammary gland
Related codes in N61
Frequently asked questions
What is ICD-10 code N61.0?
N61.0 is the ICD-10-CM code for mastitis without abscess, in the block N60-N65 (Disorders of breast).
Is N61.0 a billable code?
Yes. N61.0 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does N61.0 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.