ICD-10-CM 2027
ICD-10 code for Gynecomastia
From the official ICD-10-CM alphabetic index entry “Gynecomastia”. Page updated September 29, 2026.
About coding Gynecomastia
The ICD-10-CM code for Gynecomastia is N62 (Hypertrophy of breast).
Don't report N62 together with the conditions in its Excludes1 note: breast engorgement of newborn (P83.4) and 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.
Don't confuse with (Excludes1 for N62)
Common questions about Gynecomastia ICD-10 codes
What is the ICD-10 code for Gynecomastia?
- N62 — Hypertrophy of breast.
Is N62 billable?
- Yes. N62 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N62 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N62 as a principal diagnosis.
Is N62 a CC or MCC?
- No. N62 is neither a CC nor an MCC under MS-DRG v44.0.