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ICD-10 Guide
ICD-10 CodesH70.21

H70.21

Billable

Acute petrositis

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/12/2025

Code Description

ICD-10 H70.21 is a billable code used to indicate a diagnosis of acute petrositis.

Key Diagnostic Point:

Acute petrositis is an inflammatory condition affecting the petrous part of the temporal bone, often resulting from a complication of otitis media or mastoiditis. Clinically, patients may present with severe ear pain, fever, and neurological symptoms such as headache, dizziness, or hearing loss. The inflammation can lead to complications such as cranial nerve palsies, particularly affecting the facial nerve due to its proximity to the petrous bone. Diagnosis typically involves imaging studies, such as CT or MRI, to visualize the extent of the inflammation and rule out other conditions. Management often includes antibiotic therapy, and in severe cases, surgical intervention may be necessary to drain abscesses or debride infected tissue. Prompt recognition and treatment are crucial to prevent further complications, including meningitis or brain abscess. Accurate coding for acute petrositis is essential for appropriate reimbursement and tracking of healthcare outcomes.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiation from other ear-related conditions
  • Need for precise documentation of symptoms and imaging results
  • Potential for overlapping codes with otitis media and mastoiditis
  • Variability in clinical presentation among patients

Audit Risk Factors

  • Inadequate documentation of clinical findings
  • Failure to document imaging studies performed
  • Misclassification with other ear conditions
  • Lack of clear treatment plans in medical records

Specialty Focus

Medical Specialties

Otolaryngology

Documentation Requirements

Detailed clinical notes including history, physical examination findings, imaging results, and treatment plans.

Common Clinical Scenarios

Patients presenting with ear pain, fever, and neurological symptoms requiring evaluation for potential complications.

Billing Considerations

Ensure that all relevant imaging and laboratory results are included in the documentation to support the diagnosis.

Radiology

Documentation Requirements

Clear imaging reports detailing findings related to the petrous bone and surrounding structures.

Common Clinical Scenarios

Imaging studies requested for patients with suspected acute petrositis to assess for abscess formation or other complications.

Billing Considerations

Radiologists should provide comprehensive reports that correlate imaging findings with clinical symptoms.

Coding Guidelines

Inclusion Criteria

Use H70.21 When
  • According to ICD
  • 10 coding guidelines, acute petrositis is classified under diseases of the ear and mastoid process
  • It is important to document the acute nature of the condition and any associated complications

Exclusion Criteria

Do NOT use H70.21 When
  • Exclusion criteria include chronic conditions or other specific ear diseases that do not fit the acute presentation

Related ICD-10 Codes

Related CPT Codes

69210CPT Code

Removal of impacted cerumen

Clinical Scenario

Often performed in conjunction with evaluation for ear pain.

Documentation Requirements

Document the reason for cerumen removal and any associated findings.

Specialty Considerations

Otolaryngologists should ensure that the procedure is linked to the diagnosis of acute petrositis.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of conditions like acute petrositis, improving the accuracy of data collection and reimbursement processes. The granularity of ICD-10 codes helps in tracking disease prevalence and outcomes more effectively.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like acute petrositis, improving the accuracy of data collection and reimbursement processes. The granularity of ICD-10 codes helps in tracking disease prevalence and outcomes more effectively.

Reimbursement & Billing Impact

reimbursement processes. The granularity of ICD-10 codes helps in tracking disease prevalence and outcomes more effectively.

Resources

Clinical References

  • •
    American Academy of Otolaryngology - Head and Neck Surgery

Coding & Billing References

  • •
    American Academy of Otolaryngology - Head and Neck Surgery

Frequently Asked Questions

What are the common symptoms of acute petrositis?

Common symptoms include severe ear pain, fever, headache, dizziness, and potential hearing loss. Neurological symptoms may also occur due to cranial nerve involvement.