ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
ICD-10 CodesA42.0

A42.0

Actinomycotic brain abscess

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 A42.0 is a billable code used to indicate a diagnosis of actinomycotic brain abscess.

Key Diagnostic Point:

Actinomycotic brain abscess is a rare but serious infection of the brain caused by Actinomyces species, which are anaerobic bacteria typically found in the oral cavity and gastrointestinal tract. This condition often occurs in immunocompromised patients, such as those with HIV/AIDS, diabetes, or those undergoing immunosuppressive therapy. The abscess may develop following a contiguous spread from adjacent structures, such as the sinuses or teeth, or through hematogenous dissemination. Clinically, patients may present with neurological deficits, seizures, or signs of increased intracranial pressure. Diagnosis can be challenging due to the nonspecific nature of symptoms and the need for advanced imaging techniques, such as MRI or CT scans, to visualize the abscess. Culturing the organism can be difficult, as Actinomyces species are slow-growing and may require specific media for isolation. Treatment typically involves prolonged antibiotic therapy and, in some cases, surgical intervention to drain the abscess. Early recognition and management are crucial to prevent complications and improve outcomes.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Difficulty in diagnosing due to nonspecific symptoms.
  • Need for advanced imaging to confirm the presence of an abscess.
  • Challenges in culturing Actinomyces species.
  • Variability in clinical presentation among immunocompromised patients.

Audit Risk Factors

  • Inadequate documentation of immunocompromised status.
  • Failure to document the specific organism cultured.
  • Lack of detailed imaging reports.
  • Insufficient clinical correlation between symptoms and diagnosis.

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed history of immunocompromised status, laboratory results, and imaging studies.

Common Clinical Scenarios

Patients presenting with neurological symptoms and a history of dental infections or immunosuppression.

Billing Considerations

Ensure accurate documentation of organism identification and treatment response.

Neurology

Documentation Requirements

Neurological examination findings, imaging results, and treatment plans.

Common Clinical Scenarios

Patients with seizures or focal neurological deficits and imaging suggestive of abscess.

Billing Considerations

Document any differential diagnoses considered and the rationale for the final diagnosis.

Coding Guidelines

Inclusion Criteria

Use A42.0 When
  • According to ICD
  • 10 coding guidelines, A42
  • 0 should be used when the diagnosis of actinomycotic brain abscess is confirmed through clinical and imaging findings
  • It is important to document the patient's immunocompromised status and any relevant laboratory results
  • infectious etiologies

Exclusion Criteria

Do NOT use A42.0 When
  • Exclusion criteria include abscesses caused by other organisms or non

Related CPT Codes

61500CPT Code

Craniotomy, for excision of brain abscess

Clinical Scenario

Used when surgical intervention is required for drainage of the abscess.

Documentation Requirements

Operative report detailing the procedure and findings.

Specialty Considerations

Neurosurgery must document the indication for surgery and any complications.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of actinomycotic brain abscesses, improving the accuracy of data collection and reimbursement. It emphasizes the importance of documenting the underlying immunocompromised status of patients, which is crucial for appropriate coding and treatment planning.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of actinomycotic brain abscesses, improving the accuracy of data collection and reimbursement. It emphasizes the importance of documenting the underlying immunocompromised status of patients, which is crucial for appropriate coding and treatment planning.

Reimbursement & Billing Impact

reimbursement. It emphasizes the importance of documenting the underlying immunocompromised status of patients, which is crucial for appropriate coding and treatment planning.

Resources

Clinical References

  • •
    CDC Actinomycosis Information

Coding & Billing References

  • •
    CDC Actinomycosis Information

Frequently Asked Questions

What are the common symptoms of actinomycotic brain abscess?

Common symptoms include headache, seizures, fever, and focal neurological deficits. Symptoms may vary based on the location of the abscess and the patient's overall health.

How is actinomycotic brain abscess diagnosed?

Diagnosis typically involves imaging studies such as MRI or CT scans to identify the abscess, along with microbiological cultures to confirm the presence of Actinomyces species.

What is the treatment for actinomycotic brain abscess?

Treatment usually involves prolonged antibiotic therapy, often with high-dose penicillin, and may require surgical drainage of the abscess.

Who is at risk for developing actinomycotic brain abscess?

Individuals who are immunocompromised, such as those with HIV/AIDS, diabetes, or those undergoing chemotherapy, are at higher risk for developing this condition.