O23.521 – Salpingo-oophoritis in pregnancy, first trimester

ICD-10-CM 2027 diagnosis code · Other maternal disorders predominantly related to pregnancy

Billable code

ICD-10-CM code O23.521
Code
O23.521 (claims format: O23521)
Description
Salpingo-oophoritis in pregnancy, first trimester
Billable
Yes – valid for HIPAA-covered transactions
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
15. Pregnancy, childbirth and the puerperium (O00-O9A)
Block
O20-O29 Other maternal disorders predominantly related to pregnancy
Parent codes
O23 › O23.5 › O23.52

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

O23 – Infections of genitourinary tract in pregnancy

Excludes2 (not included here):
  • 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.-)

O23.52 – Salpingo-oophoritis in pregnancy

Applicable to:
  • Oophoritis in pregnancy
  • Salpingitis in pregnancy

Block O20-O29

Excludes2 (not included here):
  • maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
  • maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperium (O98-O99)

Related codes in O23.52

Frequently asked questions

What is ICD-10 code O23.521?

O23.521 is the ICD-10-CM code for salpingo-oophoritis in pregnancy, first trimester, in the block O20-O29 (Other maternal disorders predominantly related to pregnancy).

Is O23.521 a billable code?

Yes. O23.521 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does O23.521 belong to?

It belongs to category O23 – Infections of genitourinary tract in pregnancy.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.