ICD-10-CM 2027
ICD-10 code for Didymytis
From the official ICD-10-CM alphabetic index entry “Didymytis”. Page updated September 29, 2026.
About coding Didymytis
The ICD-10-CM code for Didymytis is N45.1 (Epididymitis). The official index lists 1 more specific code, 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 Didymytis codes (official index)
- with orchitis N45.3 — Epididymo-orchitis
Common questions about Didymytis ICD-10 codes
What is the ICD-10 code for Didymytis?
- N45.1 — Epididymitis. More specific codes apply when the documentation supports them: N45.3.
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.