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    v1.0.28
    OpenPayerBilling CodesDisorders of breastICD-10-CM n65-deformity-and-disproportion-reconstructed-breast
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    ICD-10-CM Code For Deformity And Disproportion Of Reconstructed Breast: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group N65 includes diagnoses for deformity and disproportion of reconstructed breast tissue, such as asymmetry, contour irregularities, and implant-related positional issues following breast reconstruction. These ICD-10-CM diagnosis codes are used to document post-reconstructive complications and anatomical abnormalities, capturing clinical complexity related to aesthetic outcome, implant status, or surgical revision needs. Accurate coding within the ICD-10-CM N65 group supports proper claim adjudication and complete clinical documentation for appropriate reimbursement.

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    ICD-10-CM N65: Deformity And Disproportion Of Reconstructed Breast Overview

    This code group describes deformities and disproportions of reconstructed breasts following mastectomy or other reconstructive procedures, affecting breast shape, symmetry, and contour. It targets the breast and associated soft tissues and is used when post-reconstruction anatomic or aesthetic abnormalities are present. Accurate coding matters for appropriate clinical documentation and reimbursement related to reconstructive and revision procedures.

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    When to Use

    Use a code from this group when documenting clinical encounters for evaluation, management, or revision of a reconstructed breast with noted deformity or disproportion. These codes apply when the primary clinical focus is the anatomical or aesthetic abnormality resulting from breast reconstruction.

    ICD-10-CM Codes

    2 rows

    ICD-10-CM CodeDescription
    N65.0Deformity of reconstructed breast
    N65.1Disproportion of reconstructed breast

    DRG Codes

    2 rows

    DRG CodeDescription
    600Non-Malignant Breast Disorders with CC/MCC
    601Non-Malignant Breast Disorders without CC/MCC

    Typical Clinical Scenarios

    • A 48-year-old woman one year after unilateral mastectomy with immediate implant-based reconstruction presents to clinic with progressive visible distortion and firmness of the reconstructed breast, bruising absent, but concern for cosmetic deformity and discomfort during daily activities. Examination shows malposition and contour irregularity of the implant without signs of acute infection; imaging confirms implant rotation and capsular contracture causing asymmetry. A diagnosis from this group is assigned to document deformity/disproportion of the reconstructed breast as the primary issue prompting evaluation and potential revision. Typical codes: N65.0
    • A 62-year-old woman with a history of bilateral autologous flap reconstruction after mastectomy reports chronic volume loss and noticeable discrepancy between the reconstructed breasts developing over several years, with clothing fit problems and patient dissatisfaction. Clinical assessment reveals fat necrosis and soft-tissue contracture leading to progressive deformity and disproportion of the reconstructed breasts, managed as a chronic postoperative complication. A code from this group is used to capture the long-term deformity related to reconstructive surgery that drives ongoing follow-up and possible corrective procedures. Typical codes: N65.1
    • A 35-year-old woman presents to the emergency department after trauma to the chest from a motor vehicle collision; she has a previously reconstructed breast with implant rupture and acute contour abnormality, pain, and erythema at the reconstruction site. Evaluation identifies acute distortion of the reconstructed breast architecture due to implant compromise and associated soft-tissue injury; the reconstructive deformity is documented in addition to acute traumatic findings. A deformity/disproportion code from this group is assigned to represent the acute alteration of the reconstructed breast contributing to the visit. Typical codes: N65.0, N65.1

    Related Codes

    N60-BENIGN-MAMMARY-DYSPLASIA

    ICD-10-CM Code For Benign Mammary Dysplasia: Group Overview

    N61-INFLAMMATORY-DISORDERS-OF-BREAST

    ICD-10-CM Code For Inflammatory Disorders Of Breast: Group Overview

    N62-HYPERTROPHY-OF-BREAST

    ICD-10-CM Code For Hypertrophy Of Breast: Group Overview

    N63-UNSPECIFIED-LUMP-IN-BREAST

    ICD-10-CM Code For Unspecified Lump In Breast: Group Overview

    N64-OTHER-DISORDERS-OF-BREAST

    ICD-10-CM Code For Other Disorders Of Breast: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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