All ICD10 Codes

N64

Non-Billable
ChapterN00–N99
Rankcategory
Official Description

Other disorders of breast

Use a more specific code (6 billable, 2 non-billable)
N64.0Fissure and fistula of nippleN64.1Fat necrosis of breastN64.2Atrophy of breastN64.3Galactorrhea not associated with childbirthN64.4MastodyniaN64.5Other signs and symptoms in breasthas subcodesN64.8Other specified disorders of breasthas subcodesN64.9Disorder of breast, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 14: Diseases of the Genitourinary System (N00-N99).

CH14 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

N60-N65 Parent Instructions

Excludes1(Not coded here. Use a different code.)
  • disorders of breast associated with childbirth (O91-O92)

Instructional Notes

Excludes2(Not included here. Code separately if applicable.)
  • mechanical complication of breast prosthesis and implant (T85.4-)

Clinical Hierarchy

BillableHas subcodes
CH14Diseases of the genitourinary system (N00-N99)
N60-N65Disorders of breast (N60-N65)
N64Other disorders of breastNot billable
N64.0Fissure and fistula of nippleBillable
N64.1Fat necrosis of breastBillable
N64.2Atrophy of breastBillable
N64.3Galactorrhea not associated with childbirthBillable
N64.4MastodyniaBillable
N64.5Other signs and symptoms in breastSubcodes
N64.8Other specified disorders of breastSubcodes
N64.9Disorder of breast, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to N64:

blockN60-N65
Disorders of breast (N60-N65)
View context instructions
chapterCH14
Diseases of the genitourinary system (N00-N99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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