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ICD-10-CM 2027 diagnosis code

N40Benign prostatic hyperplasia

Not billable — use a more specific code

N40 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 N40

N40 is the ICD-10-CM diagnosis code for benign prostatic hyperplasia. It belongs to 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.

To report this condition, pick the subcode that matches the documentation: N40.0 (without lower urinary tract symptoms), N40.1 (with lower urinary tract symptoms), N40.2 (symptoms) and N40.3 (symptoms).

Don't report N40 together with the conditions in its Excludes1 note: benign neoplasms of prostate (adenoma, benign) (fibroadenoma) (fibroma) (myoma) (D29.1).

The conditions in its Excludes2 note aren't part of N40, but may be coded alongside it if the patient has both: malignant neoplasm of prostate (C61).

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

Specific codes under N40

Coding notes

IncludesFurther defines the content of the category
  • adenofibromatous hypertrophy of prostate
  • benign hypertrophy of the prostate
  • benign prostatic hypertrophy
  • BPH
  • enlarged prostate
  • nodular prostate
  • polyp of prostate
Excludes1Not coded here — never report together with this code
  • benign neoplasms of prostate (adenoma, benign) (fibroadenoma) (fibroma) (myoma) (D29.1)
Excludes2Not included here — may be reported together if both conditions exist
  • malignant neoplasm of prostate (C61)

Notes that apply from higher levels

Instructions written at a parent level also apply to N40.

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

Codes whose notes reference N40

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): Title revised — was “Enlarged prostate”

Common questions about N40

Is N40 billable?

No. N40 is a header code. Report one of its more specific subcodes instead.