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ICD-10 Code N61.0: Mastitis without abscess

N61.0 is a billable ICD-10 diagnosis code used to classify Mastitis without abscess 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).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

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 mastitis without abscess 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
N61Inflammatory disorders of breast
currentN61

Official coding notes

Inclusion terms
  • Infective mastitis (acute) (nonpuerperal) (subacute)
  • Mastitis (acute) (nonpuerperal) (subacute) NOS
  • Cellulitis (acute) (nonpuerperal) (subacute) of breast NOS
  • Cellulitis (acute) (nonpuerperal) (subacute) of nipple NOS

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

Coding guidelines

Common synonyms

Mastitis without abscess

Frequently asked questions

Code details

CodeN61.0
SystemICD10
Display nameMastitis without abscess
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
Cellulitis(diffuse) (phlegmonous) (septic) (suppurative)Cellulitis(diffuse) (phlegmonous) (septic) (suppurative)Cellulitis(diffuse) (phlegmonous) (septic) (suppurative)Fistula(cutaneous)Fistula(cutaneous)GalactophoritisInfection, infected, infective(opportunistic)Infection, infected, infective(opportunistic)Inflammation, inflamed, inflammatory(with exudation)Inflammation, inflamed, inflammatory(with exudation)Inflammation, inflamed, inflammatory(with exudation)Mammillitis

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.

ICD-10 Code N61.0 for Mastitis without abscess | HealthAssure