N64.89 – Other specified disorders of breast
ICD-10-CM 2027 diagnosis code · Disorders of breast
ICD-10-CM code
N64.89
- Code
N64.89(claims format:N6489)- Description
- Other specified disorders of 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
- N64 › N64.8
Notes for N64.89
Applicable to:
- Galactocele
- Subinvolution of breast (postlactational)
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
N64 – Other disorders of breast
Excludes2 (not included here):
- mechanical complication of breast prosthesis and implant (T85.4-)
Block N60-N65
Index terms for N64.89
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Cyst, milk
- Galactocele
- Hematoma, breast
- Deformity, breast
- Pendulous, breast
- Subinvolution, breast
- Deformity, nipple, acquired
- Infarct, infarction, breast
- Unilateral, development, breast
- Occlusion, occluded, mammary duct
- Degeneration, degenerative, breast
- Degeneration, degenerative, nipple
- Disorder, breast, specified type NEC
- Mastopathy, mastopathia, ovarian origin
- Disease, diseased, breast, specified NEC
- Mastopathy, mastopathia, estrogenic, oestrogenica, oestrogenic
Related codes in N64.8
- N64.81 – Ptosis of breastBillable
- N64.82 – Hypoplasia of breastBillable
Frequently asked questions
What is ICD-10 code N64.89?
N64.89 is the ICD-10-CM code for other specified disorders of breast, in the block N60-N65 (Disorders of breast).
Is N64.89 a billable code?
Yes. N64.89 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does N64.89 belong to?
It belongs to category N64 – Other 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.