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ICD10BillableValid for clinical use

ICD-10 Code N64.0: Fissure and fistula of nipple

N64.0 is a billable ICD-10 diagnosis code used to classify Fissure and fistula of nipple in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the genitourinary system (N00-N99).

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the genitourinary system (N00-N99).

When is it used?

  • May be used when a clinician documents fissure and fistula of nipple in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
14Diseases of the genitourinary system (N00-N99)
block
N60-N65Disorders of breast
category
N64Other disorders of breast
currentN64

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

UrologistGynecologist

Coverage-related procedures and services

CPT 19030high
INJECTION PROCEDURE ONLY FOR MAMMARY DUCTOGRAM OR GALACTOGRAM
Source: CMS coverage guidance
HCPCS C8906high
MAGNETIC RESONANCE IMAGING WITH CONTRAST, BREAST; BILATERAL
Source: CMS coverage guidance
HCPCS C8903high
MAGNETIC RESONANCE IMAGING WITH CONTRAST, BREAST; UNILATERAL
Source: CMS coverage guidance
HCPCS C8908high
MAGNETIC RESONANCE IMAGING WITHOUT CONTRAST FOLLOWED BY WITH CONTRAST, BREAST; BILATERAL
Source: CMS coverage guidance
HCPCS C8905high
MAGNETIC RESONANCE IMAGING WITHOUT CONTRAST FOLLOWED BY WITH CONTRAST, BREAST; UNILATERAL
Source: CMS coverage guidance
CPT 77049high
MAGNETIC RESONANCE IMAGING, BREAST, WITHOUT AND WITH CONTRAST MATERIAL(S), INCLUDING COMPUTER-AIDED DETECTION (CAD REAL-TIME LESION DETECTION, CHARACTERIZATION AND PHARMACOKINETIC ANALYSIS), WHEN PERFORMED; BILATERAL
Source: CMS coverage guidance

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
N64.0

Common synonyms

Fissure and fistula of nipple

Frequently asked questions

Code details

CodeN64.0
SystemICD10
Display nameFissure and fistula of nipple
ChapterDiseases of the genitourinary system (N00-N99)
BlockDisorders of breast

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Cracked nippleFissure, fissuredFistula(cutaneous)

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.