Medicine, 94640, 94664 (Q&A) (May 1998)

May 1998 page 10b Coding Consultation Medicine, 94640, 94664 (Q&A) Question What is the difference between inhalation codes 94640 and 94664 ? AMA Comment Code 94640 , Nonpressurized inhalation treatment for acute airway obstruction , is reported for an inhalation treatment for an acute airway obstruction such as status asthmaticus. Code 94664 , Aerosol or vapor inhalations for sputum mobilization, bronchodilation or sputum induction for diagnostic purposes; initial demonstration and/or evaluation , is intended that the aerosol or vapor inhalations for sputum mobilization, aerosol or vapor inhalations for bronchodilation, or aerosol or vapor inhalations for sputum induction are performed for diagnostic purposes , with...

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Note:  The following article synopsis was NOT provided by the AMA. It was created by Find-A-Code/innoviHealth.

Article Overview

This short AMA CPT Assistant coding consultation explains the scope of a May 1998 question-and-answer item about two inhalation procedure codes in the Medicine section. It is relevant to coding professionals who need to understand how the article frames the distinction between treatment and diagnostic inhalation services, along with the context in which the guidance appears.

Why This Topic Matters

Articles like this help coders, auditors, and billing staff interpret AMA guidance published in CPT Assistant and determine whether a specific inhalation service falls within the article’s discussion. It also supports historical reference work for CPT Medicine coding and documentation review.

Article Sections

  1. Coding Consultation

    Introductory editorial context and the question being addressed in the consultation format.

  2. Question

    The coding question posed about two inhalation procedure codes.

  3. AMA Comment

    AMA editorial guidance discussing the general clinical contexts addressed by the article and the circumstances referenced in the consultation.

What You Will Learn

  • The article’s overall coding topic and format
  • The general subject matter of the inhalation procedure guidance
  • How the AMA frames the consultation context for the Medicine section
  • What type of coding issue is being discussed in the Q&A

Who Should Read This

  • Medical coders
  • Coding auditors
  • Revenue cycle staff
  • Compliance teams
  • Physician practice administrators
  • Clinical documentation specialists

Codes Discussed


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