O23.521 Salpingo-oophoritis in pregnancy, first trimester

✓ Billable ICD-10-CM 2026
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The ICD-10-CM code for Salpingo-oophoritis in pregnancy, first trimester is O23.521 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Section
O20-O29: Other maternal disorders predominantly related to pregnancy (O20-O29)
Category O23
47 codes (36 billable)
FY2026 Status
Stable since FY2024

U.S. Hospital Utilization

  • An estimated 55 U.S. inpatient stays in 2021 included O23.521 among the documented diagnoses.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

References

Related Codes

Parent Code

O23 Infections of genitourinary tract in pregnancy

Related Codes in O23

O23 Infections of genitourinary tract in pregnancy O23.0 Infections of kidney in pregnancy O23.00 Infections of kidney in pregnancy, unspecified trimester O23.01 Infections of kidney in pregnancy, first trimester O23.02 Infections of kidney in pregnancy, second trimester O23.03 Infections of kidney in pregnancy, third trimester O23.1 Infections of bladder in pregnancy O23.10 Infections of bladder in pregnancy, unspecified trimester O23.11 Infections of bladder in pregnancy, first trimester O23.12 Infections of bladder in pregnancy, second trimester O23.13 Infections of bladder in pregnancy, third trimester O23.2 Infections of urethra in pregnancy O23.20 Infections of urethra in pregnancy, unspecified trimester O23.21 Infections of urethra in pregnancy, first trimester O23.22 Infections of urethra in pregnancy, second trimester O23.23 Infections of urethra in pregnancy, third trimester O23.3 Infections of other parts of urinary tract in pregnancy O23.30 Infections of other parts of urinary tract in pregnancy, unspecified trimester O23.31 Infections of other parts of urinary tract in pregnancy, first trimester O23.32 Infections of other parts of urinary tract in pregnancy, second trimester
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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