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ICD-10 Guide
ICD-10 CodesH66.91

H66.91

Billable

Otitis media, unspecified, right ear

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

Code Description

ICD-10 H66.91 is a billable code used to indicate a diagnosis of otitis media, unspecified, right ear.

Key Diagnostic Point:

Otitis media is an inflammatory condition of the middle ear, which can be acute or chronic. The unspecified nature of this code indicates that the specific type of otitis media (e.g., serous, purulent) has not been determined. Clinically, patients may present with ear pain, fever, irritability in children, and hearing loss. The right ear designation is crucial for accurate coding, especially in cases where bilateral involvement is common. Diagnostic criteria typically include a thorough history and physical examination, often supplemented by otoscopic examination revealing fluid in the middle ear. Management may involve observation, antibiotics, or surgical interventions such as tympanostomy tube placement, particularly in recurrent cases. Accurate coding is essential for appropriate treatment reimbursement and tracking of healthcare outcomes.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Unspecified nature of the condition can lead to ambiguity in coding.
  • Differentiating between acute and chronic otitis media may require additional documentation.
  • Right ear specification necessitates careful attention to detail.
  • Potential for co-morbid conditions affecting the ear complicates coding.

Audit Risk Factors

  • Inadequate documentation of symptoms and clinical findings.
  • Failure to specify the right ear in cases of bilateral otitis.
  • Lack of follow-up documentation for recurrent cases.
  • Misuse of unspecified codes when more specific codes are available.

Specialty Focus

Medical Specialties

Otolaryngology

Documentation Requirements

Detailed history of ear symptoms, physical examination findings, and treatment plans.

Common Clinical Scenarios

Patients presenting with ear pain, drainage, or hearing loss.

Billing Considerations

Ensure clarity in documentation regarding the type and duration of otitis media.

Pediatrics

Documentation Requirements

Developmental history, vaccination status, and family history of ear infections.

Common Clinical Scenarios

Young children with recurrent ear infections requiring monitoring or intervention.

Billing Considerations

Documenting parental concerns and child’s response to treatment is crucial.

Coding Guidelines

Inclusion Criteria

Use H66.91 When
  • Follow official ICD
  • CM guidelines for coding otitis media, ensuring to document the right ear and any associated symptoms

Exclusion Criteria

Do NOT use H66.91 When
  • Exclude codes for other types of ear infections unless specified

Related ICD-10 Codes

Related CPT Codes

69436CPT Code

Tympanostomy, bilateral

Clinical Scenario

Used when recurrent otitis media necessitates tube placement.

Documentation Requirements

Document indications for surgery and prior treatment attempts.

Specialty Considerations

Otolaryngologists should ensure thorough pre-operative evaluations.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specificity in coding ear conditions, improving data accuracy and treatment tracking. H66.91 reflects the need for precise documentation to avoid misclassification.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specificity in coding ear conditions, improving data accuracy and treatment tracking. H66.91 reflects the need for precise documentation to avoid misclassification.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specificity in coding ear conditions, improving data accuracy and treatment tracking. H66.91 reflects the need for precise documentation to avoid misclassification.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

What is the difference between H66.91 and H66.00?

H66.91 is used for unspecified otitis media in the right ear, while H66.00 specifies acute serous otitis media, which is a more defined condition.