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ICD-10 Guide
ICD-10 CodesO23.01

O23.01

Billable

Infections of kidney in pregnancy, first trimester

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

Code Description

ICD-10 O23.01 is a billable code used to indicate a diagnosis of infections of kidney in pregnancy, first trimester.

Key Diagnostic Point:

Infections of the kidney during the first trimester of pregnancy, such as pyelonephritis, can pose significant risks to both the mother and the developing fetus. These infections often arise from untreated urinary tract infections (UTIs) and can lead to serious complications, including preterm labor, low birth weight, and maternal sepsis. Symptoms may include fever, flank pain, dysuria, and increased urinary frequency. Diagnosis typically involves urinalysis, urine culture, and imaging studies if necessary. Treatment usually includes appropriate antibiotics that are safe for use during pregnancy, such as penicillins or cephalosporins, while avoiding those that may pose risks to fetal development. Close monitoring and follow-up care are essential to ensure resolution of the infection and to mitigate any potential complications.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between types of urinary tract infections and their severity.
  • Understanding the implications of antibiotic safety in pregnancy.
  • Navigating the documentation requirements for high-risk conditions.
  • Recognizing the potential for complications that may arise from untreated infections.

Audit Risk Factors

  • Inadequate documentation of symptoms and treatment plans.
  • Failure to specify the trimester of pregnancy.
  • Misclassification of the type of infection (e.g., UTI vs. pyelonephritis).
  • Lack of follow-up documentation post-treatment.

Specialty Focus

Medical Specialties

Obstetrics and Gynecology

Documentation Requirements

Detailed documentation of symptoms, diagnostic tests, and treatment plans is essential for accurate coding.

Common Clinical Scenarios

A pregnant patient presenting with fever and flank pain diagnosed with pyelonephritis.

Billing Considerations

Consideration of antibiotic safety and potential fetal risks when documenting treatment.

Maternal-Fetal Medicine

Documentation Requirements

Thorough documentation of maternal and fetal health status, including any complications.

Common Clinical Scenarios

Management of a high-risk pregnancy with a history of recurrent UTIs leading to kidney infections.

Billing Considerations

Focus on the impact of maternal infections on fetal outcomes and the need for multidisciplinary care.

Coding Guidelines

Inclusion Criteria

Use O23.01 When
  • Follow the official ICD
  • CM coding guidelines for obstetric conditions, ensuring that the trimester is accurately documented and that the infection is clearly defined

Exclusion Criteria

Do NOT use O23.01 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

99223CPT Code

Initial hospital care, typically 70 minutes or more

Clinical Scenario

Used when a pregnant patient is admitted for treatment of a kidney infection.

Documentation Requirements

Document the patient's history, examination findings, and treatment plan.

Specialty Considerations

Ensure that the obstetric history is included in the documentation.

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 data collection and reimbursement processes for infections during pregnancy.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, improving the accuracy of data collection and reimbursement processes for infections during pregnancy.

Reimbursement & Billing Impact

reimbursement processes for infections during pregnancy.

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 kidney infections in pregnancy?

Common symptoms include fever, chills, flank pain, nausea, vomiting, and dysuria. Prompt evaluation and treatment are essential to prevent complications.