ICD-10-CM 2027 diagnosis code

N45Orchitis and epididymitis

Not billable — use a more specific code

N45 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About N45

N45 is the ICD-10-CM diagnosis code for orchitis and epididymitis. It belongs to block N40-N53 (diseases of male genital organs) and chapter 14 (diseases of the genitourinary system). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: N45.1 (epididymitis), N45.2 (orchitis), N45.3 (epididymo-orchitis) and N45.4 (testis).

Use an additional code (B95-B97), to identify infectious agent.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under N45

Coding notes

Use additional codeAdd a secondary code to fully describe the condition

code (B95-B97), to identify infectious agent.

Notes that apply from higher levels

Instructions written at a parent level also apply to N45.

Broader instructions also apply from Chapter 14: Diseases of the genitourinary system.

Codes whose notes reference N45

N49Excludes1

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about N45

Is N45 billable?: No. N45 is a header code. Report one of its more specific subcodes instead.