94642
No office rateAerosol inhalation treatment
94640 covers intermittent treatment for acute airway obstruction or diagnostic sputum induction. 94642 is a separate aerosol-treatment code associated with a specified drug.
On this page
CMS RVU26D · Effective 2026-10-01
94640 Inhalation treatment Medicare reimbursement rates in Missouri
Reports an inhalation treatment delivered for acute airway obstruction or diagnostic sputum induction, such as nebulized medication for an acute episode. Compare 94640 office and facility rates across CMS payment localities in Missouri.
Amounts below use the non-QP conversion factor for participating physicians. These are base physician payments before claim-level adjustments, not patient costs or total hospital charges.
What does Medicare pay for 94640 in Missouri?
Missouri has 3 payment localities in this comparison. Use the service location to choose the applicable amount. These are the supported base rates for the 3 payment areas shown below, using the same CMS release.
Office / nonfacility
$7.52–$8.28
3 of 3 localities have a supported rate.
Facility setting
No supported rate
These are locality ranges, not averages or address-specific quotes. A facility-setting amount covers the physician service; it does not include a hospital’s separate bill. Choose a locality below to inspect its calculation, compare other payment areas, or price a percentage of Medicare.
Where 94640 pays more and less in Missouri
3 payment localities
$7.52 to $8.28
Respiratory therapy
About 94640: Acute inhalation treatment
Reports an inhalation treatment delivered for acute airway obstruction or diagnostic sputum induction, such as nebulized medication for an acute episode.
This service covers an intermittent inhalation treatment delivered through a nebulizer, aerosol generator, metered-dose inhaler, or similar device to relieve acute airway obstruction or induce sputum for diagnostic testing. A common situation is nebulized bronchodilator treatment for a patient with acute wheezing or an asthma or COPD exacerbation. Physicians, nurses, and respiratory therapists may be involved in delivering the treatment in an office, clinic, or hospital setting.
Report one unit for an episode of care, even when the patient receives multiple inhalation treatments during that episode. For separate episodes on the same date, follow CPT reporting guidance for distinct episodes. Document the clinical reason, device or method, treatment provided, and the patient’s response. When billed as an incident-to service, CMS requires performance under physician supervision.
CMS billing rules for 94640
- Professional and technical components
- Incident-to service: billed only when performed under physician supervision.
Where the value comes from
- Work RVU0.00 · 0%
- Practice expense (office) RVU0.25 · 96%
- Malpractice RVU0.01 · 4%
236.5K
Medicare services in 2024 · #351 by national volume
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.
94640 compared with similar codes
Office rates for Missouri, from the same CMS release.
$53.92–$59.50
Choose 94640 for intermittent inhalation treatment; 94644 describes continuous treatment and covers its first hour.
$17.35–$19.11
94640 is treatment delivery. 94664 is demonstration or evaluation of the patient’s use of an inhalation device, not medication treatment.
Compare 94640 by payment locality
Find the payment area for your service address, then open its rate page for calculation inputs, release history and the percentage-of-Medicare tool. A city may cross payment-area boundaries; the ZIP lookup above helps resolve the location.
3 of 3 payment localities
Metropolitan Kansas City →
Office / nonfacility
$8.17
Facility
Unavailable
Metropolitan St. Louis →
Office / nonfacility
$8.28
Facility
Unavailable
Rest Of Missouri →
Office / nonfacility
$7.52
Facility
Unavailable
Need rates for a whole code list?
Fee-sheet and API access are in early access. Tell us which codes and locations your team needs.
94640 billing questions
Is 94640 reported for every nebulizer treatment?
No. Report one unit for the episode of care, regardless of the number of inhalation treatments provided during that episode. Distinct episodes on the same date are subject to CPT reporting guidance.
When is 94640 preferable to continuous inhalation treatment?
Use 94640 for an intermittent treatment for acute airway obstruction or diagnostic sputum induction. Code 94644 describes continuous inhalation treatment, with 94645 for each additional hour.
Can a nurse or respiratory therapist provide the service?
They may be involved in delivering it. When the service is billed as incident-to, it must be performed under physician supervision.
What documentation supports 94640?
Document the acute obstruction or diagnostic sputum-induction purpose, the treatment and delivery method, and the patient’s response. The record should support the reported episode of care.
Is inhaler instruction part of 94640?
No. 94640 represents treatment delivery, while 94664 is for demonstrating or evaluating the patient’s use of an inhalation device. Report the latter only when that distinct teaching or evaluation service is performed and supported.
Where these rates come from
FeeBase calculates base physician payments from CMS work, practice-expense, and malpractice RVUs, adjusted by each locality’s geographic indices and the applicable conversion factor. Unavailable or separately priced services are labeled rather than assigned a made-up amount.
Source: RVU26D. Effective 2026-10-01 through the day before 2027-01-01.
12,40994621,TC,Cardiopulm exercise testing,A,,0.00,2.90,,2.90,NA,0.03,2.93,2.93,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,02,0,99,0.00,0.00,0.00
12,41094625,,Phy/qhp op pulm rhb w/o mntr,A,,0.36,2.20,,0.08,,0.05,2.61,0.49,0,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
12,41194626,,Phy/qhp op pulm rhb w/mntr,A,,0.56,2.64,,0.10,,0.07,3.27,0.73,0,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
12,41294640,,Airway inhalation treatment,A,,0.00,0.25,,0.25,NA,0.01,0.26,0.26,5,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
12,41394642,,Aerosol inhalation treatment,C,,0.00,0.00,,0.00,,0.00,0.00,0.00,5,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
12,41494644,,Cont inhlj tx 1st hour,A,,0.00,1.85,,1.85,NA,0.02,1.87,1.87,5,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
12,41594645,,Cont inhlj tx each addl hour,A,,0.00,0.49,,0.49,NA,0.01,0.50,0.50,5,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00