ICD-10-CM 2027
ICD-10 code for epididymitis
From the official ICD-10-CM alphabetic index entry “Epididymitis (acute) (nonvenereal) (recurrent) (residual)”. Page updated September 29, 2026.
About coding epididymitis
The ICD-10-CM code for epididymitis is N45.1 (Epididymitis). The official index lists 8 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on N45.1.
Within N45 (orchitis and epididymitis), N45.1 is specifically for epididymitis. Related codes cover orchitis (N45.2), epididymo-orchitis (N45.3) and abscess of epididymis or testis (N45.4).
Use an additional code (B95-B97), to identify infectious agent.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific epididymitis codes (official index)
- with orchitis N45.3 — Epididymo-orchitis
- blennorrhagic (gonococcal) A54.23 — Gonococcal infection of other male genital organs
- caseous (tuberculous) A18.15 — Tuberculosis of other male genital organs
- chlamydial A56.19 — Other chlamydial genitourinary infection
- filarial B74.9 — Filariasis, unspecified
- gonococcal A54.23 — Gonococcal infection of other male genital organs
- syphilitic A52.76 — Other genitourinary symptomatic late syphilis
- tuberculous A18.15 — Tuberculosis of other male genital organs
Common questions about epididymitis ICD-10 codes
What is the ICD-10 code for epididymitis?
- N45.1 — Epididymitis. More specific codes apply when the documentation supports them: N45.3, A54.23, A18.15, A56.19 and others below.
What is the ICD-10 code for blennorrhagic epididymitis?
- A54.23 — Gonococcal infection of other male genital organs.
What is the ICD-10 code for caseous epididymitis?
- A18.15 — Tuberculosis of other male genital organs.
What is the ICD-10 code for chlamydial epididymitis?
- A56.19 — Other chlamydial genitourinary infection.
What is the ICD-10 code for filarial epididymitis?
- B74.9 — Filariasis, unspecified.
What is the ICD-10 code for gonococcal epididymitis?
- A54.23 — Gonococcal infection of other male genital organs.
What is the ICD-10 code for syphilitic epididymitis?
- A52.76 — Other genitourinary symptomatic late syphilis.
Is N45.1 billable?
- Yes. N45.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N45.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N45.1 as a principal diagnosis.
Is N45.1 a CC or MCC?
- No. N45.1 is neither a CC nor an MCC under MS-DRG v44.0.