CPT code 94660: CPAP management2026 Medicare rate & RVUs in Illinois
Report CPAP initiation and management when a clinician starts or manages continuous positive airway pressure therapy, commonly for obstructive sleep apnea.
Medicare pays $66.58–$72.12 for 94660 in the office in Illinois, from Rest Of Illinois to Chicago. 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.
On this page 9 sections
What 94660 covers
This service covers a clinician’s work to begin or manage continuous positive airway pressure (CPAP) therapy. It is commonly provided by pulmonary or sleep-medicine clinicians for patients with obstructive sleep apnea, in an office or facility setting. The service concerns the patient’s CPAP treatment, such as getting therapy started and addressing its use; it is distinct from supplying or renting the CPAP equipment.
Report 94660 when the documented encounter includes CPAP initiation or management, not merely a discussion of a planned treatment or a note that the patient already uses CPAP. Documentation should identify the clinical reason for therapy and the work performed, such as device or interface setup, changes made, patient instruction, or response when applicable. CMS values practice expense differently for office and facility settings, so the place of service affects the payment valuation. The code has no add-on designation in the supplied CMS facts.
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 94660 pays more and less in Illinois
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
4 payment localities
$66.58 to $72.12
| Payment locality | Office | Facility |
|---|---|---|
| Chicago | $72.12 | $35.20 |
| East St. Louis | $67.78 | $33.98 |
| Rest Of Illinois | $66.58 | $33.03 |
| Suburban Chicago | $72.01 | $34.27 |
How the 94660 rate is calculated
Each of 94660’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 · 94660
RVUs × geographic indexes × conversion factor
Work0.74
0.74 RVUs× 1.000 GPCI
Practice expense1.27
1.27 RVUs× 1.000 GPCI
Malpractice0.06
0.06 RVUs× 1.000 GPCI
Adjusted RVUs
2.0700
Conversion factor
$33.4009
Medicare rate
$69.14
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 94660
94660 has no global surgery period, no multiple-procedure, bilateral or assistant-at-surgery adjustment, and no professional/technical split. What changes the payment is where the service happens: the place of service on the claim decides whether Medicare pays the office or the facility rate.
Place of service · 94660
Which rate does Medicare pay?
The POS code on the claim line (CMS-1500 box 24B).
POS 11 · non-facility rate · national
$69.14
- Non-facility (office)
- $69.14
- Facility
- $32.40
Higher because the practice carries its own overhead.
94660 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 95811Sleep study
- Use 95811 for an attended sleep study that includes sleep monitoring and CPAP titration. Use 94660 for CPAP initiation or management outside that sleep-study service.
- 95810Sleep study
- 95810 is diagnostic polysomnography without CPAP titration. It describes the sleep study, while 94660 describes CPAP initiation or management.
- 94664Inhaler training
- 94664 is for demonstrating or evaluating use of aerosol devices such as inhalers or nebulizers. It is not the code for CPAP setup or management.
94660 billing questions
How is 94660 different from a CPAP titration sleep study?
94660 describes CPAP initiation or management. An attended sleep study that records sleep and titrates pressure is a separate service, such as 95811.
Does 94660 pay for the CPAP machine or mask?
No. It represents the clinical service of initiating or managing therapy, not the purchase or rental of equipment.
Can 94664 be used for CPAP mask instruction?
94664 concerns demonstration or evaluation of aerosol-device use, such as an inhaler or nebulizer. CPAP initiation and management belong under 94660 when that is the service performed.
What should the record show to support 94660?
Document the reason for CPAP therapy and the initiation or management work performed. Include relevant setup or interface changes, instruction, and the patient’s response when these occurred.
Is 94660 reported for a diagnostic sleep study?
No. A diagnostic polysomnography service is distinct from CPAP initiation and management; select the sleep-study code that matches the study performed.
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
Show the CMS file lines behind this rate
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