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ICD-10-CM Code N40.1
Enlarged prostate with lower urinary tract symptoms

Billable Code
Billable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.
Male Only
Male Only
Code is only used for male patients.
Adult Only
Adult Only
Code is only used for patients 15 years old or older.
| ICD-10 from 2011 - 2016

N40.1 is a billable ICD code used to specify a diagnosis of enlarged prostate with lower urinary tract symptoms. A 'billable code' is detailed enough to be used to specify a medical diagnosis.

The ICD code N40 is used to code Benign prostatic hyperplasia

Benign prostatic hyperplasia (BPH), also called benign enlargement of the prostate (BEP or BPE), adenofibromyomatous hyperplasia and benign prostatic hypertrophy (technically incorrect usage), is a benign (noncancerous) increase in size of the prostate. BPH involves hyperplasia of prostatic stromal and epithelial cells, resulting in the formation of large, fairly discrete nodules in the transition zone of the prostate. When sufficiently large, the nodules impinge on the urethra and increase resistance to flow of urine from the bladder. This is commonly referred to as "obstruction," although the urethral lumen is no less patent, only compressed. Resistance to urine flow requires the bladder to work harder during voiding, possibly leading to progressive hypertrophy, instability, or weakness (atony) of the bladder muscle. BPH involves hyperplasia (an increase in the number of cells) rather than hypertrophy (a growth in the size of individual cells), but the two terms are often used interchangeably, even among urologists. Although prostate specific antigen levels may be elevated in these patients because of increased organ volume and inflammation due to urinary tract infections, BPH does not lead to cancer or increase the risk of cancer.

Specialty: Urology
MeSH Code: D011470
ICD 9 Code: 600

Diagram illustrating normal prostate (left) and benign prostatic hyperplasia (right).

Source: Wikipedia

Coding Notes for N40.1 Info for medical coders on how to properly use this ICD-10 code

Inclusion Terms:
Inclusion Terms
Inclusion Terms are a list of concepts for which a specific code is used. The list of Inclusion Terms is useful for determining the correct code in some cases, but the list is not necessarily exhaustive.
Enlarged prostate with LUTS
Additional Code Note:
Use Additional Code
Use Additional Code note means a second code must be used in conjunction with this code. Codes with this note are Etiology codes and must be followed by a Manifestation code or codes.
Code for associated symptoms, when specified:
Incomplete bladder emptying See code R39.14
Nocturia See code R35.1
Straining on urination See code R39.16
Urinary frequency See code R35.0
Urinary hesitancy See code R39.11
Urinary incontinence See code N39.4-
Urinary obstruction See code N13.8
Urinary retention See code R33.8
Urinary urgency See code R39.15
Weak urinary stream See code R39.12

MS-DRG Mapping

  • DRG Group #725-726 - Benign prostatic hypertrophy with MCC.
  • DRG Group #725-726 - Benign prostatic hypertrophy without MCC.

Related Concepts SNOMET-CT

  • Nocturia associated with benign prostatic hypertrophy (finding)
  • Nocturia due to benign prostatic hypertrophy (finding)
  • Incomplete emptying of bladder due to benign prostatic hypertrophy (finding)

ICD-10-CM Alphabetical Index References for 'N40.1 - Enlarged prostate with lower urinary tract symptoms'

The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code N40.1. Click on any term below to browse the alphabetical index.


Hypertrophy (benign) of prostate with urinary obstruction and other lower urinary tract symptoms (LUTS) (approximate match)

This is the official approximate match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that while there is no exact mapping between this ICD10 code N40.1 and a single ICD9 code, 600.01 is an approximate match for comparison and conversion purposes.

Parent Code: N40 - Enlarged prostate

** This Document Provided By ICD.Codes **
Source: http://icd.codes/icd10cm/N401