2026 ICD-10-CM Diagnosis Code N65.0Deformity of reconstructed breast

ICD-10-CM Codes›N00–N99›N60-N65›N65

ICD-10-CM N65.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N65.0 is a billable ICD-10-CM diagnosis code for deformity of reconstructed breast. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 600 through 601. The code is restricted by the Medicare Code Editor to adult patients (age 15 through 124). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nonmalignant breast conditions.

Code Identity

ICD-10-CM Code
N65.0
Billable Status
Yes — Valid for Submission
Code Describes
Deformity of reconstructed breast
Short Description
Deformity of reconstructed breast
Same as the full description in the CMS dataset.
Parent Code
N65
Deformity and disproportion of reconstructed breast

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN60-N65Disorders of breast
CategoryN65Deformity and disproportion of reconstructed breast
This CodeN65.0Deformity of reconstructed breast

Code EditsBilling

Medicare Code Editor checks that affect claim validity for N65.0.

Adult diagnoses
The Medicare Code Editor detects inconsistencies in adult cases by checking a patient's age and any diagnosis on the patient's record. The adult code edits apply to patients age range is 15–124 years inclusive (e.g., senile delirium, mature cataract).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Deformity of reconstructed breast
  • Double convexity deformity of lower pole of breast due to and following breast augmentation with prosthesis
  • Lower pole stretch deformity of breast due to and following breast augmentation with prosthesis

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Contour irregularity in reconstructed breast
  • Excess tissue in reconstructed breast
  • Misshapen reconstructed breast

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Complication(s) (from) (of)
      • reconstructed breast
        • deformity
    • Complication(s) (from) (of)
      • reconstructed breast
        • excess tissue
    • Complication(s) (from) (of)
      • reconstructed breast
        • misshappen
    • Deformity
      • breast (acquired)
        • reconstructed
    • Irregular, irregularity
      • contour, reconstructed breast
    • Irregular, irregularity
      • reconstructed breast

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR GEN017
Nonmalignant breast conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Breast Diseases

Breast diseases include various conditions and changes in your breast. Most women experience breast changes at some time. Your age, hormone levels, and medicines you take may cause lumps, bumps, and discharges of fluids that are not breast milk.

The full article covers:

  • What are breast diseases?
  • What are the symptoms of breast disease?
  • How are breast diseases diagnosed?
  • What are the treatments for breast disease?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert N65.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
612.0 Deformity reconst breast
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About N65.0Overview

Is N65.0 (Deformity and disproportion of reconstructed breast) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report deformity of reconstructed breast on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does N65.0 group to?

When deformity of reconstructed breast is the principal diagnosis on an inpatient stay, it groups to MS-DRG 600, 601, with relative weights from 0.6050 to 1.0416 depending on complications. Higher weights mean higher Medicare reimbursement.

Who can N65.0 be reported for?

The Medicare Code Editor checks deformity of reconstructed breast against patient demographics: this code is intended for adult patients (age 15 through 124). Claims outside these limits are flagged as inconsistent.

What is the ICD-9 equivalent of N65.0?

Under the General Equivalence Mappings, deformity of reconstructed breast converts to ICD-9-CM 612.0 (deformity reconst breast). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.