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v1.0.0
ICD-10 Guide
ICD-10 CodesH70.009

H70.009

Billable

Acute mastoiditis without complications, unspecified ear

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

Code Description

ICD-10 H70.009 is a billable code used to indicate a diagnosis of acute mastoiditis without complications, unspecified ear.

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). This condition is characterized by the inflammation and infection of the mastoid air cells, which can lead to significant complications if not addressed promptly. Patients often present with symptoms such as ear pain, fever, and swelling behind the ear. In some cases, there may be drainage from the ear, but in this specific code, it is noted as 'without complications,' indicating that there are no severe manifestations such as abscess formation or intracranial complications. Diagnosis is primarily clinical, supported by imaging studies like CT scans to assess the extent of the infection. Management typically involves antibiotics, and in some cases, surgical intervention may be necessary to drain infected material or to remove necrotic tissue. The absence of complications makes this code particularly relevant for cases that are managed conservatively or with minimal intervention.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between acute and chronic mastoiditis
  • Identifying the presence or absence of complications
  • Understanding the relationship with otitis media
  • Proper documentation of clinical findings

Audit Risk Factors

  • Inadequate documentation of clinical findings
  • Misclassification of acute vs. chronic conditions
  • Failure to document the absence of complications
  • Incorrect linkage of procedures to diagnosis

Specialty Focus

Medical Specialties

Otolaryngology

Documentation Requirements

Detailed clinical notes on symptoms, examination findings, and treatment plans.

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 H70.009.

Pediatrics

Documentation Requirements

Thorough history and physical examination, including family history of ear infections.

Common Clinical Scenarios

Children with recurrent otitis media leading to acute mastoiditis.

Billing Considerations

Consider age-related factors in presentation and treatment.

Coding Guidelines

Inclusion Criteria

Use H70.009 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the clinical presentation and treatment
  • Include details that confirm the diagnosis of acute mastoiditis without complications

Exclusion Criteria

Do NOT use H70.009 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

69436CPT Code

Myringotomy with tube placement

Clinical Scenario

Often performed in conjunction with treatment for acute mastoiditis to alleviate pressure.

Documentation Requirements

Document the indication for the procedure and any findings during surgery.

Specialty Considerations

Otolaryngologists should ensure that the procedure is justified based on the clinical scenario.

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 mastoiditis, improving the accuracy of data collection and reimbursement processes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like acute mastoiditis, improving the accuracy of data collection and reimbursement processes.

Reimbursement & Billing Impact

reimbursement processes.

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 sometimes drainage from the ear. Patients may also experience hearing loss.