ICD-10-CM 2027
ICD-10 code for nipple bleeding
From the official ICD-10-CM alphabetic index entry “Bleeding › nipple”. Page updated September 29, 2026.
About coding nipple bleeding
The ICD-10-CM code for nipple bleeding is N64.59 (Other signs and symptoms in breast).
Within N64.5, choose N64.59 (Other signs and symptoms in breast) only when documentation doesn't support a more specific option: Induration of breast (N64.51), nipple discharge (N64.52) and retraction of nipple (N64.53).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 600 (Non-Malignant Breast Disorders with CC/MCC, relative weight 0.9975) and DRG 601 (Non-Malignant Breast Disorders without CC/MCC, relative weight 0.6017), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about nipple bleeding ICD-10 codes
What is the ICD-10 code for nipple bleeding?
- N64.59 — Other signs and symptoms in breast.
Is N64.59 billable?
- Yes. N64.59 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N64.59 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N64.59 as a principal diagnosis.
Is N64.59 a CC or MCC?
- No. N64.59 is neither a CC nor an MCC under MS-DRG v44.0.