ICD code definitions

CPT® Code 94664: Demonstration and Evaluation of Patient Use of Aerosol Device

September 22, 2026
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3 min read
CPT® Code 94664

CPT® Code 94664 is used to report the demonstration and evaluation of a patient's use of an aerosol inhalation device. This service helps ensure that patients understand how to properly use prescribed respiratory devices, such as metered-dose inhalers, nebulizers, or other inhalation equipment.

Proper technique can be an important part of respiratory treatment, and providers may use this service to demonstrate device operation, assess the patient's technique, and provide instruction or correction when needed.

Key Facts About CPT® 94664

  • Service type: Respiratory therapy service
  • Service: Demonstration and evaluation of patient use of an aerosol device
  • Devices: Aerosol delivery devices, inhalers, nebulizers, or related equipment
  • Purpose: Teach and evaluate proper device technique
  • Clinical use: Respiratory conditions requiring aerosolized medication
  • Provider type: Physicians and qualified healthcare professionals

Common clinical indications:

  • Asthma
  • Chronic obstructive pulmonary disease (COPD)
  • Reactive airway disease
  • Other respiratory conditions requiring inhaled medications
  • New or changed inhaler or aerosol device
  • Incorrect or ineffective inhaler technique

When to Use CPT® 94664

CPT 94664 may be reported when the provider demonstrates use of an aerosol delivery device and evaluates the patient's ability to use it properly.

Examples:

  • Teaching a patient how to correctly use a newly prescribed metered-dose inhaler
  • Demonstrating proper use of a nebulizer
  • Observing a patient's inhaler technique and correcting errors
  • Re-evaluating technique after a change in respiratory medication or delivery device

The documentation should establish that instruction and evaluation of the patient's device technique were actually performed.

Documentation Requirements

Documentation supporting CPT 94664 should include:

  • Patient identifiers and date of service
  • Respiratory condition or clinical indication
  • Aerosol device or inhalation equipment reviewed
  • Instruction provided to the patient
  • Patient's demonstrated technique
  • Errors or deficiencies identified, when applicable
  • Corrective instruction provided
  • Patient understanding or ability to demonstrate proper technique
  • Follow-up recommendations, when appropriate

Clear documentation helps establish the medical necessity of the service and demonstrates that patient education and technique evaluation occurred.

Reimbursement and Coding Considerations

  • CPT 94664 represents demonstration and evaluation of patient use of an aerosol inhalation device
  • Documentation should support the medical necessity of the education and evaluation
  • The service should be distinguished from other pulmonary function testing and respiratory therapy services
  • Coverage and reimbursement requirements vary by payer
  • Practices should verify payer-specific requirements before submitting claims

Accurate documentation of the device, instruction provided, and patient's performance can help support appropriate reporting.

How OptiMantra Supports Respiratory Care Documentation

OptiMantra helps practices document patient education, respiratory care, and related clinical information within the patient chart.

With OptiMantra, providers can:

  • Document inhaler and aerosol device education
  • Record clinical indications and respiratory symptoms
  • Document patient instruction and response
  • Use customizable chart templates for consistent documentation
  • Record treatment plans and follow-up recommendations

Keeping education and treatment documentation within the patient chart helps providers maintain a comprehensive record of respiratory care.

Try OptiMantra for free here!

Disclaimer: CPT® codes are maintained by the American Medical Association. This guide is for informational purposes only and does not replace official coding guidelines or payer policies.

Jessica Castro
Jessica Castro

Jessica is a Massachusetts-based LPN with 13+ years of experience in patient care, healthcare technology, and education. As the Implementation and Customer Success Manager at OptiMantra, she helps providers optimize EMR solutions for better workflows and patient outcomes. With a Bachelor's in Community Health and a Master's in Healthcare Innovation in progress, she is passionate about leveraging technology to improve care delivery. Through her writing, she shares insights on healthcare best practices, EHR optimization, and patient advocacy to support providers in delivering exceptional care.