Billing code 94668: Chest wall therapyMedicare rate & RVUs in Illinois
Report 94668 for a subsequent session of manual chest wall techniques used to mobilize pulmonary secretions and support lung function.
Medicare pays $36.11–$40.63 for 94668 in the office in Illinois, from Rest Of Illinois to Suburban 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 94668 covers
94668 describes a later session of manually applied chest wall techniques, such as percussion or vibration, to help mobilize airway secretions. It may be used in respiratory care for patients who need secretion-clearance therapy, including people with chronic lung disease or an acute respiratory illness. A respiratory therapist or other qualified clinician commonly performs the treatment in an outpatient setting.
Use this code for a subsequent treatment, rather than the initial service represented by 94667. Documentation should identify the reason for secretion-clearance therapy, the manual techniques performed, and the treatment provided at that session. Under the CMS incident-to rule, the service is 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 94668 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
$36.11 to $40.63
| Payment locality | Office | Facility |
|---|---|---|
| Chicago | $40.14 | Unavailable |
| East St. Louis | $36.68 | Unavailable |
| Rest Of Illinois | $36.11 | Unavailable |
| Suburban Chicago | $40.63 | Unavailable |
How the 94668 rate is calculated
Each of 94668’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 · 94668
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 0.00Practice expense 1.15Malpractice 0.02
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 94668
The CMS indicators that decide how 94668 is paid alongside other services.
CMS payment indicators · 94668
Chest wall therapy
| 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. |
94668 compared with similar codes
Compare codes
94668 vs 94667 vs 94669 vs 94640: national Medicare rates
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How to choose
- 94667Chest physiotherapy
- Choose 94667 for the initial manual chest wall treatment and 94668 for a subsequent session.
- 94669Chest oscillation
- 94668 describes manual techniques such as percussion or vibration; 94669 describes mechanical chest wall oscillation.
- 94640Inhalation treatment
- 94640 describes an inhalation treatment, not manual chest wall techniques for secretion clearance.
94668 billing questions
Can 94668 be reported for the first manual chest wall treatment?
No. 94668 is for a subsequent treatment; 94667 represents the initial service.
What documentation supports 94668?
Record the clinical need for secretion clearance, the manual techniques used, and the treatment delivered at the subsequent session.
Does 94668 describe mechanical chest wall oscillation?
No. It describes manually applied techniques. 94669 is the related code for mechanical chest wall oscillation.
Is nebulizer treatment included in 94668?
No. 94668 describes manual chest wall therapy, while 94640 describes an inhalation treatment. Report each only when that distinct service was performed.
What supervision is required for Medicare billing?
CMS identifies 94668 as an incident-to service; it is billed only when performed under physician supervision.
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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