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ICD-10 Guide
ICD-10 CodesO23.00

O23.00

Billable

Infections of kidney in pregnancy, unspecified trimester

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

Code Description

ICD-10 O23.00 is a billable code used to indicate a diagnosis of infections of kidney in pregnancy, unspecified trimester.

Key Diagnostic Point:

Infections of the kidney during pregnancy, often referred to as pyelonephritis, can pose significant risks to both the mother and fetus. These infections typically arise from ascending urinary tract infections and can lead to serious complications if not treated promptly. Symptoms may include fever, flank pain, dysuria, and nausea. The condition can occur at any trimester, but it is most common in the second and third trimesters. Diagnosis is usually confirmed through urinalysis and urine culture, and treatment often involves antibiotics that are safe for use during pregnancy. It is crucial for healthcare providers to monitor the mother closely for signs of systemic infection and to ensure that the fetus is not adversely affected. The management of kidney infections in pregnant patients requires a multidisciplinary approach, often involving obstetricians and urologists, to ensure optimal outcomes for both mother and child.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between acute and chronic infections
  • Identifying the trimester of pregnancy when the infection occurs
  • Understanding the implications of antibiotic safety in pregnancy
  • Recognizing associated complications such as preterm labor or low birth weight

Audit Risk Factors

  • Inadequate documentation of symptoms and treatment
  • Failure to specify the trimester of pregnancy
  • Incorrect coding of associated conditions
  • Lack of follow-up documentation for ongoing treatment

Specialty Focus

Medical Specialties

Obstetrics and Gynecology

Documentation Requirements

Detailed documentation of symptoms, laboratory results, and treatment plans is essential for accurate coding.

Common Clinical Scenarios

A pregnant patient presents with fever and flank pain, leading to a diagnosis of pyelonephritis.

Billing Considerations

Coders must ensure that the correct trimester is documented and that antibiotic treatments are noted for safety.

Maternal-Fetal Medicine

Documentation Requirements

Comprehensive documentation of maternal and fetal health status, including any complications arising from the infection.

Common Clinical Scenarios

Management of a high-risk pregnancy where the mother has a history of recurrent urinary tract infections.

Billing Considerations

High-risk factors must be clearly documented to justify the complexity of care provided.

Coding Guidelines

Inclusion Criteria

Use O23.00 When
  • Coders should follow the official ICD
  • CM guidelines for obstetric coding, ensuring that the trimester is specified and that any associated conditions are accurately captured

Exclusion Criteria

Do NOT use O23.00 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

99213CPT Code

Established patient office visit, level 3

Clinical Scenario

Used for follow-up visits after treatment of kidney infection in pregnancy.

Documentation Requirements

Document the patient's symptoms, treatment response, and any changes in condition.

Specialty Considerations

Obstetricians should ensure that the visit is clearly linked to the management of the kidney infection.

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 infections of the kidney, which helps in better tracking and management of maternal health during pregnancy.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, including infections of the kidney, which helps in better tracking and management of maternal health during pregnancy.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, including infections of the kidney, which helps in better tracking and management of maternal health during pregnancy.

Resources

Clinical References

  • •
    ACOG Practice Bulletin on Urinary Tract Infections in Pregnancy

Coding & Billing References

  • •
    ACOG Practice Bulletin on Urinary Tract Infections in Pregnancy

Frequently Asked Questions

What are the common symptoms of kidney infections in pregnancy?

Common symptoms include fever, chills, flank pain, dysuria, and nausea. Prompt recognition and treatment are crucial to prevent complications.