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ICD-10-CM 2027 diagnosis code

N42.3Dysplasia of prostate

Not billable — use a more specific code

N42.3 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.

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 N42.3

N42.3 is the ICD-10-CM diagnosis code for 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 a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within N42 (other and unspecified disorders of prostate), N42.3 is specifically for dysplasia of prostate. Related codes cover calculus of prostate (N42.0), congestion and hemorrhage of prostate (N42.1), other specified disorders of prostate (N42.8) and disorder of prostate, unspecified (N42.9).

To report this condition, pick the subcode that matches the documentation: N42.30 (prostate), N42.31 (neoplasia), N42.32 (prostate) and N42.39 (prostate).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2017 (expanded into subcodes).

Specific codes under N42.3

Notes that apply from higher levels

Instructions written at a parent level also apply to N42.3.

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

Codes whose notes reference N42.3

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)
  • FY2017 (effective 10/1/2016): Expanded — no longer billable

Common questions about N42.3

Is N42.3 billable?

No. N42.3 is a header code. Report one of its more specific subcodes instead.