ICD-10 Diagnosis Code N40

Benign prostatic hyperplasia

Diagnosis Code N40

ICD-10: N40
Short Description: Benign prostatic hyperplasia
Long Description: Benign prostatic hyperplasia
This is the 2018 version of the ICD-10-CM diagnosis code N40

Not Valid for Submission
The code N40 is a "header" and not valid for submission for HIPAA-covered transactions.

Code Classification
  • Diseases of the genitourinary system (N00–N99)
    • Diseases of male genital organs (N40-N53)
      • Benign prostatic hyperplasia (N40)

Information for Medical Professionals

Tabular List of Diseases and Injuries
References found for the code N40 in the Tabular List of Diseases and Injuries:

  • Includes Notes:
    • adenofibromatous hypertrophy of prostate
    • benign hypertrophy of the prostate
    • benign prostatic hypertrophy
    • BPH
    • enlarged prostate
    • nodular prostate
    • polyp of prostate
  • Type 1 Excludes Notes:
    • benign neoplasms of prostate (adenoma, benign) (fibroadenoma) (fibroma) (myoma) (D29.1)
  • Type 2 Excludes Notes:
    • malignant neoplasm of prostate (C61)

Information for Patients


Enlarged Prostate (BPH)

Also called: benign prostatic hyperplasia

The prostate is a gland in men. It helps make semen, the fluid that contains sperm. The prostate surrounds the tube that carries urine out of the body. As men age, their prostate grows bigger. If it gets too large, it can cause problems. An enlarged prostate is also called benign prostatic hyperplasia (BPH). Most men will get BPH as they get older. Symptoms often start after age 50.

BPH is not cancer, and it does not seem to increase your chance of getting prostate cancer. But the early symptoms are the same. Check with your doctor if you have

  • A frequent and urgent need to urinate, especially at night
  • Trouble starting a urine stream or making more than a dribble
  • A urine stream that is weak, slow, or stops and starts several times
  • The feeling that you still have to go, even just after urinating
  • Small amounts of blood in your urine

Severe BPH can cause serious problems over time, such as urinary tract infections, and bladder or kidney damage. If it is found early, you are less likely to develop these problems.

Tests for BPH include a digital rectal exam, blood and imaging tests, a urine flow study, and examination with a scope called a cystoscope. Treatments include watchful waiting, medicines, nonsurgical procedures, and surgery.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

  • Digital rectal exam (Medical Encyclopedia)
  • Enlarged prostate (Medical Encyclopedia)
  • Enlarged prostate - after care (Medical Encyclopedia)
  • Prostate removal (Medical Encyclopedia)
  • Prostate resection - minimally invasive (Medical Encyclopedia)
  • Urinary Retention - NIH (National Institute of Diabetes and Digestive and Kidney Diseases)

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ICD-10 Footnotes

General Equivalence Map Definitions
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.

Index of Diseases and Injuries Definitions

  • And - The word "and" should be interpreted to mean either "and" or "or" when it appears in a title.
  • Code also note - A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
  • Code first - Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
  • Type 1 Excludes Notes - A type 1 Excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • Type 2 Excludes Notes - A type 2 Excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • Includes Notes - This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
  • Inclusion terms - List of terms is included under some codes. These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • NEC "Not elsewhere classifiable" - This abbreviation in the Alphabetic Index represents "other specified". When a specific code is not available for a condition, the Alphabetic Index directs the coder to the "other specified” code in the Tabular List.
  • NOS "Not otherwise specified" - This abbreviation is the equivalent of unspecified.
  • See - The "see" instruction following a main term in the Alphabetic Index indicates that another term should be referenced. It is necessary to go to the main term referenced with the "see" note to locate the correct code.
  • See Also - A "see also" instruction following a main term in the Alphabetic Index instructs that there is another main term that may also be referenced that may provide additional Alphabetic Index entries that may be useful. It is not necessary to follow the "see also" note when the original main term provides the necessary code.
  • 7th Characters - Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
  • With - The word "with" should be interpreted to mean "associated with" or "due to" when it appears in a code title, the Alphabetic Index, or an instructional note in the Tabular List. The word "with" in the Alphabetic Index is sequenced immediately following the main term, not in alphabetical order.

Present on Admission
The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement.

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