N64: Other disorders of breast
Codes under N64 (Other disorders of breast). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| N64.0 | Fissure and fistula of nipple | ✓ |
| N64.0 | Fissure and fistula of nipple | ✓ |
| N64.1 | Fat necrosis of breast | ✓ |
| N64.1 | Fat necrosis of breast | ✓ |
| N64.2 | Atrophy of breast | ✓ |
| N64.2 | Atrophy of breast | ✓ |
| N64.3 | Galactorrhea not associated with childbirth | ✓ |
| N64.3 | Galactorrhea not associated with childbirth | ✓ |
| N64.4 | Mastodynia | ✓ |
| N64.4 | Mastodynia | ✓ |
| N64.5 | Other signs and symptoms in breast | — |
| N64.5 | Other signs and symptoms in breast | — |
| N64.8 | Other specified disorders of breast | — |
| N64.8 | Other specified disorders of breast | — |
| N64.9 | Disorder of breast, unspecified | ✓ |
| N64.9 | Disorder of breast, unspecified | ✓ |
| N64.51 | Induration of breast | ✓ |
| N64.51 | Induration of breast | ✓ |
| N64.52 | Nipple discharge | ✓ |
| N64.52 | Nipple discharge | ✓ |
| N64.53 | Retraction of nipple | ✓ |
| N64.53 | Retraction of nipple | ✓ |
| N64.59 | Other signs and symptoms in breast | ✓ |
| N64.59 | Other signs and symptoms in breast | ✓ |
| N64.81 | Ptosis of breast | ✓ |
| N64.81 | Ptosis of breast | ✓ |
| N64.82 | Hypoplasia of breast | ✓ |
| N64.82 | Hypoplasia of breast | ✓ |
| N64.89 | Other specified disorders of breast | ✓ |
| N64.89 | Other specified disorders of breast | ✓ |
Frequently asked questions
What is ICD-10-CM code N64?
N64 is an ICD-10-CM category covering Other disorders of breast. It contains 30 more specific diagnosis codes, 26 of which are billable.
Is N64 a billable code?
No — N64 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example N64.0 — Fissure and fistula of nipple). 26 of the 30 codes under N64 are billable.
What codes fall under N64?
N64 includes N64.0, N64.0, N64.1, N64.1, N64.2, plus 25 more. See the full list with descriptions and billable status above.
More free billing tools: all ICD-10 categories · ICD-10 search · denial codes · Medicare fees
Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
Code the diagnosis right
Join providers across the country delivering modern virtual care with CareNiva. Free to start, ready in minutes.
100% Satisfaction Guaranteed — try it risk-free