ICD-10-CM 2027
ICD-10 code for reconstructed breast irregular
From the official ICD-10-CM alphabetic index entry “Irregular, irregularity › reconstructed breast”. Page updated September 29, 2026.
About coding reconstructed breast irregular
The ICD-10-CM code for reconstructed breast irregular is N65.0 (Deformity of reconstructed breast).
Within N65 (deformity and disproportion of reconstructed breast), N65.0 is specifically for deformity of reconstructed breast. Related codes cover disproportion of reconstructed breast (N65.1).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 600 (Non-Malignant Breast Disorders with CC/MCC, relative weight 0.9975) and DRG 601 (Non-Malignant Breast Disorders without CC/MCC, relative weight 0.6017), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about reconstructed breast irregular ICD-10 codes
What is the ICD-10 code for reconstructed breast irregular?
- N65.0 — Deformity of reconstructed breast.
Is N65.0 billable?
- Yes. N65.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N65.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N65.0 as a principal diagnosis.
Is N65.0 a CC or MCC?
- No. N65.0 is neither a CC nor an MCC under MS-DRG v44.0.