Orchitis and epididymitis (N45) ICD-10-CM
The N45 code range covers orchitis and epididymitis with 5 ICD-10-CM diagnosis codes. 4 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
Codes in the N45 Range 5 codes · 4 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the N45 range.
Epididymitis
Inflammation of the EPIDIDYMIS. Its clinical features include enlarged epididymis, a swollen SCROTUM; PAIN; PYURIA; and FEVER. It is usually related to infections in the URINARY TRACT, which likely spread to the EPIDIDYMIS through either the VAS DEFERENS or the lymphatics of the SPERMATIC CORD.
Orchitis
Inflammation of a TESTIS. It has many features of EPIDIDYMITIS, such as swollen SCROTUM; PAIN; PYURIA; and FEVER. It is usually related to infections in the URINARY TRACT, which likely spread to the EPIDIDYMIS and then the TESTIS through either the VAS DEFERENS or the lymphatics of the SPERMATIC CORD.
About the N45 Code Range
ICD-10 codes N45 through N45.4 identify specific inflammatory conditions affecting the male reproductive organs, including orchitis, epididymitis, and related abscesses. These codes help accurately document and classify infections or inflammations of the testis and epididymis for clinical and billing purposes.
N45.1 corresponds to epididymitis, inflammation of the epididymis, also called chronic epididymitis or infective epididymitis. This code includes variations like acute epididymitis and spermatogenic granuloma of the epididymis. N45.2 covers orchitis, which is inflammation of the testis, including infective or chronic orchitis and abscesses within the testicular tissue. N45.3 is used for epididymo-orchitis, a combined inflammation of both epididymis and testis, sometimes linked with conditions such as mumps orchitis. Finally, N45.4 is designated for abscesses localized in the epididymis or testis, reflecting severe infections that may require distinct management. Recognizing these synonyms and precise code uses aids healthcare professionals in selecting the correct ICD-10 code for inflammatory male genital conditions.
Questions About This Page
How many billable codes are in the N45 range?
Of the 5 codes in this range, 4 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the N45 range classify?
The range classifies orchitis and epididymitis. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
