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ICD-10-CM 2027 diagnosis code

N62Hypertrophy of breast

✓ Billable / specific

N62 is a valid, billable ICD-10-CM code for hypertrophy of breast. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for Mammoplasia, ICD-10 code for Mastoplasia, ICD-10 code for Gynecomastia, ICD-10 code for Breast hypertrophy.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About N62

N62 is the ICD-10-CM diagnosis code for hypertrophy of breast. It belongs to block N60-N65 (disorders of breast) and chapter 14 (diseases of the genitourinary system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

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.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 611.1 (hypertrophy of breast).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Gynecomastia
  • Hypertrophy of breast NOS
  • Massive pubertal hypertrophy of breast
Excludes1Not coded here — never report together with this code
  • breast engorgement of newborn (P83.4)
  • disproportion of reconstructed breast (N65.1)

Notes that apply from higher levels

Instructions written at a parent level also apply to N62.

Broader instructions also apply from N60-N65 Disorders of breast and Chapter 14: Diseases of the genitourinary system.

Alphabetic index entries

9 entries

Terms in the official ICD-10-CM index that lead to N62.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 09 · Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast

ICD-9-CM equivalent

Converter →
  • 611.1Hypertrophy of breastexact

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about N62

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.

What DRG does N62 group to?

N62 is used in the MS-DRG v44.0 logic for MS-DRG 600 (Non-Malignant Breast Disorders with CC/MCC) and MS-DRG 601 (Non-Malignant Breast Disorders without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for N62?

The CMS General Equivalence Mappings map N62 to ICD-9-CM 611.1.