Skip to content
Dx

ICD-10-CM 2027 diagnosis code

N42.39Other dysplasia of prostate

✓ Billable / specificMale only

N42.39 is a valid, billable ICD-10-CM code for other dysplasia of prostate. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2017 (effective October 1, 2016). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About N42.39

N42.39 is the ICD-10-CM diagnosis code for other dysplasia of prostate. It belongs to category N42 (other and unspecified disorders of prostate), block N40-N53 (diseases of male genital organs) 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.

Within N42.3, choose N42.39 (Other dysplasia of prostate) only when documentation doesn't support a more specific option: unspecified dysplasia of prostate (N42.30), prostatic intraepithelial neoplasia (N42.31) and atypical small acinar proliferation of prostate (N42.32).

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 729 (Other Male Reproductive System Diagnoses with CC/MCC, relative weight 1.0544) and DRG 730 (Other Male Reproductive System Diagnoses without CC/MCC, relative weight 0.6597), in MDC 12 (Diseases and Disorders of the Male Reproductive System), 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 is on the CMS list of diagnoses consistent only with male patients (the sex-conflict edit itself was retired in FY2025).

It was added in FY2017, effective October 1, 2016.

Before ICD-10, this condition was coded in ICD-9-CM as 602.3 (dysplasia of prostate).

Notes that apply from higher levels

Instructions written at a parent level also apply to N42.39.

Broader instructions also apply from Chapter 14: Diseases of the genitourinary system.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to N42.39.

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.

ICD-9-CM equivalent

Converter →
  • 602.3Dysplasia of prostateapproximate

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
  • FY2017 (effective 10/1/2016): Added
  • No changes since FY2017.

Common questions about N42.39

Is N42.39 billable?

Yes. N42.39 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can N42.39 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict N42.39 as a principal diagnosis.

Is N42.39 a CC or MCC?

No. N42.39 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does N42.39 group to?

N42.39 is used in the MS-DRG v44.0 logic for MS-DRG 729 (Other Male Reproductive System Diagnoses with CC/MCC) and MS-DRG 730 (Other Male Reproductive System Diagnoses 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 N42.39?

The CMS General Equivalence Mappings map N42.39 to ICD-9-CM 602.3.