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ICD-10-CM 2027 diagnosis code

N46.1Oligospermia

Not billable — use a more specific code

N46.1 is a header code, so it can't be reported by itself. Choose one of the 2 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 N46.1

N46.1 is the ICD-10-CM diagnosis code for oligospermia. It belongs to category N46 (male infertility), 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 2 subcodes must be used instead.

Within N46 (male infertility), N46.1 is specifically for oligospermia. Related codes cover azoospermia (N46.0), other male infertility (N46.8) and unspecified (N46.9).

To report this condition, pick the subcode that matches the documentation: N46.11 (oligospermia) and N46.12 (due to extratesticular causes).

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 N46.1

Coding notes

Applicable toConditions and synonyms classified to this code
  • Male infertility due to germinal cell desquamation
  • Male infertility due to hypospermatogenesis
  • Male infertility due to incomplete spermatogenic arrest

Notes that apply from higher levels

Instructions written at a parent level also apply to N46.1.

› From N46 Male infertility
Excludes1

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

Codes whose notes reference N46.1

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about N46.1

Is N46.1 billable?

No. N46.1 is a header code. Report one of its more specific subcodes instead.