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ICD-10 Guide
ICD-10 CodesO23.42

O23.42

Billable

Unspecified infection of urinary tract in pregnancy, second trimester

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

Code Description

ICD-10 O23.42 is a billable code used to indicate a diagnosis of unspecified infection of urinary tract in pregnancy, second trimester.

Key Diagnostic Point:

Unspecified urinary tract infections (UTIs) during pregnancy can pose significant risks to both the mother and fetus, particularly during the second trimester when fetal development is critical. UTIs are common in pregnant women due to physiological changes, including increased urinary stasis and hormonal influences that can alter the urinary tract's normal flora. Symptoms may include dysuria, frequency, urgency, and suprapubic pain. However, some women may be asymptomatic, making screening essential. Diagnosis typically involves urinalysis and culture to identify the causative organism. Treatment is crucial to prevent complications such as pyelonephritis, which can lead to preterm labor and low birth weight. Antibiotic therapy must be carefully selected, considering safety profiles for use during pregnancy. Commonly prescribed antibiotics include nitrofurantoin and amoxicillin, which are generally considered safe in pregnancy, while others like tetracyclines should be avoided. Proper management of UTIs in pregnancy is vital to ensure maternal and fetal health.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in symptoms and presentation of UTIs in pregnant women.
  • Need for accurate documentation of the trimester and specific infection type.
  • Potential for overlapping symptoms with other pregnancy-related conditions.
  • Importance of distinguishing between asymptomatic bacteriuria and symptomatic UTI.

Audit Risk Factors

  • Inadequate documentation of symptoms and clinical findings.
  • Failure to specify the trimester of pregnancy.
  • Misclassification of asymptomatic bacteriuria as a UTI.
  • Inconsistent coding of antibiotic treatments provided.

Specialty Focus

Medical Specialties

Obstetrics and Gynecology

Documentation Requirements

Documentation must include patient history, presenting symptoms, urinalysis results, and treatment plans.

Common Clinical Scenarios

A pregnant patient presents with dysuria and frequency; urinalysis shows bacteria, leading to a diagnosis of UTI.

Billing Considerations

Coders must ensure that the diagnosis reflects the specific trimester and any complications that may arise.

Maternal-Fetal Medicine

Documentation Requirements

Detailed documentation of maternal and fetal health, including any high-risk factors.

Common Clinical Scenarios

A patient with a history of recurrent UTIs presents for monitoring during pregnancy.

Billing Considerations

High-risk pregnancies may require additional documentation regarding the management of UTIs and their impact on fetal health.

Coding Guidelines

Inclusion Criteria

Use O23.42 When
  • According to ICD
  • 10 coding guidelines, O23
  • 42 should be used when a pregnant patient presents with an unspecified urinary tract infection during the second trimester
  • Coders must ensure that the diagnosis is supported by clinical documentation and that the appropriate trimester is indicated

Exclusion Criteria

Do NOT use O23.42 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

87086CPT Code

Urine culture, bacterial

Clinical Scenario

Used when a urine culture is performed to confirm a UTI diagnosis in a pregnant patient.

Documentation Requirements

Documentation must include the reason for the culture and any relevant clinical findings.

Specialty Considerations

Obstetricians should ensure that cultures are performed in accordance with guidelines for pregnant patients.

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, including urinary tract infections. This specificity helps in better tracking of maternal health outcomes and improves the quality of care provided to pregnant patients.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, including urinary tract infections. This specificity helps in better tracking of maternal health outcomes and improves the quality of care provided to pregnant patients.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, including urinary tract infections. This specificity helps in better tracking of maternal health outcomes and improves the quality of care provided to pregnant patients.

Resources

Clinical References

  • •
    CDC Guidelines for Urinary Tract Infections in Pregnancy

Coding & Billing References

  • •
    CDC Guidelines for Urinary Tract Infections in Pregnancy

Frequently Asked Questions

What are the common symptoms of a UTI in pregnancy?

Common symptoms include dysuria, increased urinary frequency, urgency, and suprapubic pain. Some women may be asymptomatic, making routine screening important.

What antibiotics are safe to use for UTIs during pregnancy?

Antibiotics such as nitrofurantoin and amoxicillin are generally considered safe during pregnancy, while others like tetracyclines should be avoided due to potential risks to fetal development.