CPT code 94664: Inhaler training, technique demonstration and evaluation2026 Medicare rate & RVUs in Missouri
Report this service when a clinician demonstrates or evaluates a patient's use of an inhaler, nebulizer, or other aerosol delivery device.
Medicare pays $17.35–$19.11 for 94664 in the office in Missouri, from Rest of Missouri to Metropolitan St. Louis, MO. Which amount applies depends on the service address.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
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On this page 9 sections
What 94664 covers
This service involves teaching a patient how to use an aerosol delivery device or watching the patient use it to evaluate technique. The clinician may correct errors such as poor coordination with a metered-dose inhaler or improper handling of a nebulizer. It is commonly provided in an office or other setting where respiratory care is delivered, by a physician or appropriately supervised clinical staff.
Report the service for device-use instruction or technique evaluation, not simply because an inhaled medication was administered. Documentation should identify the device, the instruction or evaluation performed, and relevant findings about the patient's technique. CMS treats 94664 as an incident-to service: it may be billed only when performed under physician supervision.
This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.
Where 94664 pays more and less in Missouri
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
3 payment localities
$17.35 to $19.11
| Payment locality | Office | Facility |
|---|---|---|
| Metropolitan Kansas City, MO | $18.84 | Unavailable |
| Metropolitan St. Louis, MO | $19.11 | Unavailable |
| Rest of Missouri | $17.35 | Unavailable |
How the 94664 rate is calculated
Each of 94664’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.
How the rate is built · 94664
RVUs × geographic indexes × conversion factor
Work0.00
0.00 RVUs× 1.000 GPCI
Practice expense0.58
0.58 RVUs× 1.000 GPCI
Malpractice0.02
0.02 RVUs× 1.000 GPCI
Adjusted RVUs
0.6000
Conversion factor
$33.4009
Medicare rate
$20.04
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 94664
The CMS indicators that decide how 94664 is paid alongside other services.
CMS payment indicators · 94664
Inhaler training, technique demonstration and evaluation
| Rule | CMS value | What it means |
|---|---|---|
| Global period | XXX | The global surgery concept doesn’t apply. |
| Multiple procedures | 0 | No multiple-procedure reduction. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 0 | Not paid without supporting documentation. |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 5 | Incident-to service. |
94664 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 94640Inhalation treatmentAcute obstruction or sputum induction
- 94640 represents an inhalation treatment. 94664 represents device-use demonstration or evaluation, which must be separately performed and documented.
- 94660CPAP managementInitiation and management
- 94660 concerns CPAP initiation and management; 94664 concerns a patient's use of an aerosol delivery device such as an inhaler or nebulizer.
- 94644Continuous inhalationFirst hour
- 94644 represents continuous inhalation treatment. Choose 94664 when the service is device instruction or technique evaluation rather than continuous treatment.
94664 billing questions
When should 94664 be reported instead of 94640?
Use 94664 for demonstrating or evaluating the patient's technique with an aerosol delivery device. Code 94640 describes an inhalation treatment; a treatment alone does not establish that device instruction or evaluation occurred.
Can 94664 and 94640 be reported on the same date?
They may describe separate services when the patient receives an inhalation treatment and also receives distinct device-use instruction or technique evaluation. Document each service separately.
What documentation supports 94664?
Record the device involved, what instruction or technique assessment was performed, and any relevant technique problems or corrections.
Can clinical staff perform this service?
Yes, but CMS treats it as an incident-to service, so it may be billed only when performed under physician supervision.
Does administering medication by inhaler or nebulizer qualify by itself?
No. The service is demonstration or evaluation of the patient's device use; medication administration alone is not the service described by 94664.
Where these rates come from
FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.
CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027
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