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ICD-10 Guide
ICD-10 CodesO23.31

O23.31

Billable

Infections of other parts of urinary tract in pregnancy, first trimester

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/08/2025

Code Description

ICD-10 O23.31 is a billable code used to indicate a diagnosis of infections of other parts of urinary tract in pregnancy, first trimester.

Key Diagnostic Point:

Infections of the urinary tract during pregnancy can pose significant risks to both the mother and the developing fetus. In the first trimester, these infections may include cystitis or pyelonephritis, which can lead to complications such as preterm labor or low birth weight if left untreated. Symptoms may include dysuria, frequency, urgency, and suprapubic pain. Diagnosis typically involves urinalysis and urine culture to identify the causative organism. Treatment often includes antibiotics that are safe for use during pregnancy, such as nitrofurantoin or amoxicillin, while avoiding those contraindicated, such as tetracyclines. Close monitoring is essential to ensure resolution of the infection and to prevent recurrence, as urinary tract infections (UTIs) are common in pregnant women due to anatomical and hormonal changes. Proper coding of these conditions is crucial for accurate medical records and reimbursement.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between types of urinary tract infections (e.g., cystitis vs. pyelonephritis)
  • Understanding the implications of antibiotic safety in pregnancy
  • Documenting the trimester accurately for coding purposes
  • Recognizing associated symptoms and complications

Audit Risk Factors

  • Inadequate documentation of symptoms and treatment
  • Failure to specify the trimester of pregnancy
  • Incorrect coding of the type of urinary tract infection
  • Lack of follow-up documentation for recurrent infections

Specialty Focus

Medical Specialties

Obstetrics and Gynecology

Documentation Requirements

Documentation must include patient history, presenting symptoms, diagnostic tests performed, and treatment plans.

Common Clinical Scenarios

A pregnant patient presents with dysuria and frequency; urinalysis confirms a UTI.

Billing Considerations

Consideration of antibiotic safety and potential fetal effects is critical in documentation.

Maternal-Fetal Medicine

Documentation Requirements

Detailed documentation of maternal and fetal health, including any complications arising from infections.

Common Clinical Scenarios

A high-risk pregnant patient with a history of recurrent UTIs requiring specialized management.

Billing Considerations

High-risk factors must be documented to justify the complexity of care and coding.

Coding Guidelines

Inclusion Criteria

Use O23.31 When
  • Follow the ICD
  • CM guidelines for obstetric coding, ensuring that the trimester is accurately documented
  • Use additional codes for any complications or associated conditions as necessary

Exclusion Criteria

Do NOT use O23.31 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

87086CPT Code

Urine culture, bacterial; quantitative

Clinical Scenario

Used when a pregnant patient presents with UTI symptoms and requires confirmation of diagnosis.

Documentation Requirements

Document the reason for the culture and any previous UTI history.

Specialty Considerations

Ensure that the culture results are linked to the diagnosis for accurate coding.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, improving the accuracy of diagnoses and treatment plans. O23.31 provides clarity in documenting urinary tract infections in the first trimester, which is essential for patient care and reimbursement.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, improving the accuracy of diagnoses and treatment plans. O23.31 provides clarity in documenting urinary tract infections in the first trimester, which is essential for patient care and reimbursement.

Reimbursement & Billing Impact

reimbursement.

Resources

Clinical References

  • •
    CDC Guidelines for Antibiotic Use in Pregnancy

Coding & Billing References

  • •
    CDC Guidelines for Antibiotic Use in Pregnancy

Frequently Asked Questions

What are the common symptoms of urinary tract infections in pregnancy?

Common symptoms include dysuria, increased frequency and urgency of urination, and suprapubic pain. Some women may also experience fever or flank pain if the infection progresses.