Disorders of male genital organs in diseases classified elsewhere
In Diseases of male genital organs (N40-N53), chapter 14: Diseases of the Genitourinary System
- N51 is billable and valid on claims for FY 2027. If the record has more detail, check the other codes under N40-N53 below.
- As a secondary diagnosis it is not a CC or MCC, so it doesn't raise the MS-DRG payment.
- Doesn't count toward a Medicare Advantage risk score (no HCC in V28).
- AHRQ's Chronic Condition Indicator classes it as not chronic (an acute or short-term condition).
- Can't be the principal diagnosis: code the underlying condition first. (Manifestation list)
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Instructional notes
Excludes1: not coded here, use a different code
Code first: code the underlying condition first, then this code
- underlying disease, such as:
- filariasis (B74.0-B74.9)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers chronic kidney disease staging, CKD in kidney transplant patients, and sequencing CKD with related conditions such as diabetes and hypertension.
- Chronic kidney disease (page 62)
Other codes under N40-N53
Diseases of male genital organs (N40-N53)
- N40Benign prostatic hyperplasia
- N41Inflammatory diseases of prostate
- N42Other and unspecified disorders of prostate
- N43Hydrocele and spermatocele
- N44Noninflammatory disorders of testis
- N45Orchitis and epididymitis
- N46Male infertility
- N47Disorders of prepuce
- N48Other disorders of penis
- N49Inflammatory disorders of male genital organs, not elsewhere classified
- N50Other and unspecified disorders of male genital organs
- N51Disorders of male genital organs in diseases classified elsewhere(this code)
- N52Male erectile dysfunction
- N53Other male sexual dysfunction
N51 MS-DRGs
As the principal diagnosis, N51 groups to MS-DRG 729 or 730 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
Related conditions
Grouped by AHRQ's Clinical Classifications Software Refined (CCSR), which sorts every diagnosis code into clinically meaningful categories.
N51 is in Other specified male genital disorders (GEN016), with 64 codes. Others in it:
Medicare coverage articles listing N51
These 2 Medicare billing and coding articles list N51 as a diagnosis that supports medical necessity for the services they cover. From the CMS Medicare Coverage Database; check your own contractor's article before billing.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Penis Disorders
Problems with the penis can cause pain and affect a man's sexual function and fertility. Penis disorders include:
Read more about penis disorders on MedlinePlusTesticular Disorders
Testicles, or testes, make male hormones and sperm. They are two egg-shaped organs inside the scrotum, the loose sac of skin behind the penis. It's easy to injure your testicles because they are not protected by bones or muscles. Men and boys should wear athletic supporters when they play sports.
Read more about testicular disorders on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.
ICD-9-CM equivalent
Legacy crosswalk from the CMS General Equivalence Mappings (last updated 2018).
- 608.81 Disorders of male genital organs in diseases classified elsewhere (approximate)