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ICD-10 Guide
ICD-10 CodesH70.00

H70.00

Billable

Acute mastoiditis without complications

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

Code Description

ICD-10 H70.00 is a billable code used to indicate a diagnosis of acute mastoiditis without complications.

Key Diagnostic Point:

Acute mastoiditis is an infection of the mastoid process, typically resulting from an untreated or inadequately treated middle ear infection (otitis media). The condition is characterized by inflammation and infection of the mastoid air cells, which can lead to significant complications if not addressed promptly. Clinically, patients may present with symptoms such as ear pain, fever, swelling behind the ear, and drainage from the ear canal. Diagnosis is primarily based on clinical evaluation and imaging studies, such as CT scans, which can reveal the extent of the infection. Management often involves antibiotic therapy, and in some cases, surgical intervention may be necessary to drain infected material or to remove necrotic tissue. The absence of complications, such as abscess formation or intracranial involvement, distinguishes this code from other forms of mastoiditis. Prompt recognition and treatment are crucial to prevent progression to more severe conditions, including hearing loss or chronic mastoiditis.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between acute and chronic mastoiditis
  • Identifying complications that may alter coding
  • Understanding the relationship with otitis media
  • Documentation of clinical findings and imaging results

Audit Risk Factors

  • Inadequate documentation of symptoms and clinical findings
  • Failure to specify the absence of complications
  • Misclassification of acute versus chronic mastoiditis
  • Inconsistent coding of related conditions like otitis media

Specialty Focus

Medical Specialties

Otolaryngology

Documentation Requirements

Detailed clinical notes including symptoms, examination findings, and imaging results.

Common Clinical Scenarios

Patients presenting with ear pain, fever, and swelling behind the ear.

Billing Considerations

Ensure clear documentation of the absence of complications to justify the use of H70.00.

Pediatrics

Documentation Requirements

Thorough history and physical examination, including developmental considerations.

Common Clinical Scenarios

Children with recurrent ear infections leading to acute mastoiditis.

Billing Considerations

Consider age-related factors in presentation and management.

Coding Guidelines

Inclusion Criteria

Use H70.00 When
  • Follow official ICD
  • 10 coding guidelines, ensuring accurate documentation of clinical findings and imaging results
  • Include specific details about the absence of complications to support the use of H70

Exclusion Criteria

Do NOT use H70.00 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

69420CPT Code

Mastoidectomy, simple

Clinical Scenario

Used when surgical intervention is required for acute mastoiditis.

Documentation Requirements

Document the indication for surgery and pre-operative evaluations.

Specialty Considerations

Otolaryngologists should ensure clear documentation of the surgical necessity.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of acute mastoiditis, improving the accuracy of diagnoses and treatment tracking.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of acute mastoiditis, improving the accuracy of diagnoses and treatment tracking.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of acute mastoiditis, improving the accuracy of diagnoses and treatment tracking.

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 mastoiditis?

Common symptoms include ear pain, fever, swelling behind the ear, and drainage from the ear canal.

How is acute mastoiditis diagnosed?

Diagnosis is typically made through clinical evaluation and imaging studies, such as CT scans, to assess the extent of the infection.

What is the treatment for acute mastoiditis?

Treatment usually involves antibiotics, and surgical intervention may be necessary if there are complications or lack of improvement.