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ICD-10-CM 2027 diagnosis code

O23.51Infection of cervix in pregnancy

Not billable — use a more specific code

O23.51 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 O23.51

O23.51 is the ICD-10-CM diagnosis code for infection of cervix in pregnancy. It belongs to category O23 (infections of genitourinary tract in pregnancy), block O20-O29 (other maternal disorders predominantly related to pregnancy) and chapter 15 (pregnancy, childbirth and the puerperium). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within O23.5 (infections of the genital tract in pregnancy), O23.51 is specifically for infection of cervix in pregnancy. Related codes cover Salpingo-oophoritis in pregnancy (O23.52) and infection of other part of genital tract in pregnancy (O23.59).

To report this condition, pick the subcode that matches the documentation: O23.511 (trimester), O23.512 (trimester), O23.513 (trimester) and O23.519 (trimester).

Use an additional code to identify organism (B95.-, B96.-).

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 O23.51

Notes that apply from higher levels

Instructions written at a parent level also apply to O23.51.

› From O23 Infections of genitourinary tract in pregnancy
Excludes2
  • gonococcal infections complicating pregnancy, childbirth and the puerperium (O98.2)
  • infections with a predominantly sexual mode of transmission NOS complicating pregnancy, childbirth and the puerperium (O98.3)
  • syphilis complicating pregnancy, childbirth and the puerperium (O98.1)
  • tuberculosis of genitourinary system complicating pregnancy, childbirth and the puerperium (O98.0)
  • venereal disease NOS complicating pregnancy, childbirth and the puerperium (O98.3)
Use additional code
  • code to identify organism (B95.-, B96.-)

Broader instructions also apply from O20-O29 Other maternal disorders predominantly related to pregnancy and Chapter 15: Pregnancy, childbirth and the puerperium.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to O23.51.

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 O23.51

Is O23.51 billable?

No. O23.51 is a header code. Report one of its more specific subcodes instead.