2027 ICD-10-CM Diagnosis Code N40.3Nodular prostate with lower urinary tract symptoms

ICD-10-CM Codes›N00–N99›N40-N53›N40

ICD-10-CM N40.3
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

N40.3 is a billable ICD-10-CM diagnosis code for nodular prostate with lower urinary tract symptoms. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 725 through 726. The code is restricted by the Medicare Code Editor to adult patients (age 15 through 124). Coders also document this condition as urinary obstruction due to nodular prostate. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Hyperplasia of prostate.

Code Identity

ICD-10-CM Code
N40.3
Billable Status
Yes — Valid for Submission
Code Describes
Nodular prostate with lower urinary tract symptoms
Short Description
Nodular prostate with lower urinary tract symptoms
Same as the full description in the CMS dataset.
Parent Code
N40
Benign prostatic hyperplasia

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN40-N53Diseases of male genital organs
CategoryN40Benign prostatic hyperplasia
This CodeN40.3Nodular prostate with lower urinary tract symptoms

Code EditsBilling

Medicare Code Editor checks that affect claim validity for N40.3.

Adult diagnoses
The Medicare Code Editor detects inconsistencies in adult cases by checking a patient's age and any diagnosis on the patient's record. The adult code edits apply to patients age range is 15–124 years inclusive (e.g., senile delirium, mature cataract).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Urinary obstruction due to nodular prostate

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to N40.3: its own notes plus those printed at N40 and Chapter 14. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From N40 Benign prostatic hyperplasia applies to 4 codes
  • adenofibromatous hypertrophy of prostate
  • benign hypertrophy of the prostate
  • benign prostatic hypertrophy
  • BPH
  • enlarged prostate
  • nodular prostate
  • polyp of prostate

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From N40 Benign prostatic hyperplasia applies to 4 codes
  • benign neoplasms of prostate (adenoma, benign) (fibroadenoma) (fibroma) (myoma) (D29.1)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From N40 Benign prostatic hyperplasia applies to 4 codes
  • malignant neoplasm of prostate (C61)
From Chapter 14 (N00-N99) Diseases of the genitourinary system applies to 838 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

  • code for associated symptoms, when specified:
  • incomplete bladder emptying (R39.14)
  • nocturia (R35.1)
  • straining on urination (R39.16)
  • urinary frequency (R35.0)
  • urinary hesitancy (R39.11)
  • urinary incontinence (N39.4-)
  • urinary obstruction (N13.8)
  • urinary retention (R33.8)
  • urinary urgency (R39.15)
  • weak urinary stream (R39.12)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name N40.3, its category, or a range that includes it.

Excludes1 3

These codes carry an Excludes1 note naming N40.3: they are not reported together with it, unless the two conditions are unrelated.

  • D29.1 Benign neoplasm of prostate
    enlarged prostate (N40.-) names N40.-, which includes this code
  • N42.1 Congestion and hemorrhage of prostate
    enlarged prostate (N40.-) names N40.-, which includes this code
  • N42.1 Congestion and hemorrhage of prostate
    hyperplasia of prostate (N40.-) names N40.-, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR GEN012
Hyperplasia of prostate
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Benign Prostatic Hyperplasia

    a non-cancerous nodular enlargement of the prostate gland. it is characterized by the presence of epithelial cell nodules, and stromal nodules containing fibrous and smooth muscle elements. it is the most common urologic disorder in men, causing blockage of urine flow.

Patient EducationClinical

Enlarged Prostate (BPH)

The prostate is a gland in the male reproductive system. It lies just below the bladder. It makes fluid that is part of semen.

The full article covers:

  • What is the prostate?
  • What is an enlarged prostate (BPH)?
  • What causes an enlarged prostate (BPH)?
  • Who is more likely to develop BPH?
  • What are the symptoms of BPH?
  • What other problems can BPH cause?
  • How is BPH diagnosed?
  • What are the treatments for BPH?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert N40.3 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
600.11 Nod prostate w ur obst
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About N40.3Overview

What is the ICD-10 code for nodular prostate with lower urinary tract symptoms?

The ICD-10-CM code for nodular prostate with lower urinary tract symptoms is N40.3 (sometimes written as N403). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is N40.3 (Benign prostatic hyperplasia) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report nodular prostate with lower urinary tract symptoms on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does N40.3 group to?

When nodular prostate with lower urinary tract symptoms is the principal diagnosis on an inpatient stay, it groups to MS-DRG 725, 726, with relative weights from 0.7249 to 1.1573 depending on complications. Higher weights mean higher Medicare reimbursement.

Who can N40.3 be reported for?

The Medicare Code Editor checks nodular prostate with lower urinary tract symptoms against patient demographics: this code is intended for adult patients (age 15 through 124). Claims outside these limits are flagged as inconsistent.

Can N40.3 be reported with D29.1?

Not as a rule. The Excludes1 note at N40, which applies to N40.3, lists "benign neoplasms of prostate (adenoma, benign) (fibroadenoma) (fibroma) (myoma) (D29.1)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).