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ICD-10 Guide
ICD-10 CodesH66.90

H66.90

Billable

Otitis media, unspecified, unspecified ear

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

Code Description

ICD-10 H66.90 is a billable code used to indicate a diagnosis of otitis media, unspecified, unspecified ear.

Key Diagnostic Point:

Otitis media is an inflammation of the middle ear, which can be acute or chronic and is characterized by the presence of fluid in the middle ear space. The unspecified designation indicates that the specific type of otitis media (e.g., acute, chronic, serous) has not been determined. Patients may present with symptoms such as ear pain, hearing loss, fever, irritability in children, and drainage from the ear. Diagnosis typically involves a physical examination, including otoscopy, and may be supplemented by audiometric testing to assess hearing loss. Management may include observation, antibiotics for bacterial infections, or surgical interventions such as tympanostomy tube placement for recurrent cases. The unspecified nature of this code can complicate treatment planning and insurance reimbursement, as it lacks specificity regarding the underlying cause or duration of the condition.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Lack of specificity regarding the type of otitis media
  • Variability in clinical presentation and management
  • Potential overlap with other ear conditions
  • Need for thorough documentation to support the diagnosis

Audit Risk Factors

  • Inadequate documentation of symptoms and clinical findings
  • Failure to specify the type of otitis media
  • Inconsistent coding practices among providers
  • Use of this code inappropriately for chronic conditions

Specialty Focus

Medical Specialties

Otolaryngology

Documentation Requirements

Detailed history of present illness, physical examination findings, and treatment plan.

Common Clinical Scenarios

Acute otitis media in children, chronic otitis media in adults, and recurrent ear infections.

Billing Considerations

Ensure documentation reflects the duration and severity of symptoms to support the diagnosis.

Pediatrics

Documentation Requirements

Growth and development assessments, vaccination history, and family history of ear infections.

Common Clinical Scenarios

Frequent ear infections in young children, management of otitis media with effusion.

Billing Considerations

Consideration of age-related factors in treatment decisions and documentation of parental concerns.

Coding Guidelines

Inclusion Criteria

Use H66.90 When
  • Follow official ICD
  • CM coding guidelines, ensuring that the diagnosis is supported by clinical documentation
  • This code should be used when the type of otitis media is not specified

Exclusion Criteria

Do NOT use H66.90 When
  • Exclude cases where a more specific diagnosis is available

Related ICD-10 Codes

Related CPT Codes

69436CPT Code

Tympanostomy, bilateral

Clinical Scenario

Used for recurrent otitis media in children.

Documentation Requirements

Document the frequency of infections and previous treatments.

Specialty Considerations

Otolaryngologists should ensure clear documentation of the need for surgical intervention.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more detailed coding of ear conditions, improving specificity and accuracy in billing and treatment planning. H66.90 reflects a need for careful documentation to avoid ambiguity.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more detailed coding of ear conditions, improving specificity and accuracy in billing and treatment planning. H66.90 reflects a need for careful documentation to avoid ambiguity.

Reimbursement & Billing Impact

billing and treatment planning. H66.90 reflects a need for careful documentation to avoid ambiguity.

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

When should I use H66.90?

Use H66.90 when the type of otitis media is unspecified and there is documentation of symptoms consistent with middle ear inflammation.