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See a sample rate comparisonCPT 94729 Fee Schedule
Last Verified: October 2026
Healthcare providers use this code to document and receive reimbursement for visits that address moderate-level medical decision-making, often including multiple diagnoses or prescription management.
Gas Transfer Ability Test, A Test Of The Ability Of The Lung To Move Gases Through Its Tissues (Transfer). The Test Uses A Small Amount Of Carbon Monoxide.
| Key Fact | Detail |
|---|---|
| Service Type | Medicine Services and Procedures Pulmonary Procedures |
| Common Place of Service | 11 - Office 22 - On Campus Outpatient Hospital |
| Common Modifiers | 26 - Professional component 59 - Distinct Procedural Service |
| Complexity Level | Low |
| Medicare Fee Schedule | $63.46 national non-facility rate (2026) · View Medicare rates for 94729 |
| Medicaid Fee Schedule | $50.46 median of the 8 states in the free preview · View Medicaid rates for 94729 |
National average reimbursement for CPT 94729 by major payers:
$69.67
$72.42
$76.30
$98.15
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CPT 94729
5 of 25 sample ratesHigher to lower in this preview
Childrens National Medical Center
Childrens Hospital
$155.58Published rateCharleston Radiologists PA
Charleston Radiologists, P.A.
$92.79Published rateBrandon Hage
The Board Of Trustees Of The University Of Illinois
$72.04Published rateJonathan Kaplan
$17.04Published rateNatalia Castro
Town Center Orthopaedic Associates, P.C.
$8.16Published rate
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Payer Contract Negotiation
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See a sample payer proposalCPT 94729 vs. Other Pulmonary Procedures Codes
The CPT 94729 code is part of the Medicine Services and Procedures services used for Pulmonary Procedures. It represents a moderate-complexity encounter and is one of several codes that vary based on time spent, level of medical decision-making, and documentation requirements.
The CPT 94729 code involves more provider time and moderate medical decision-making, unlike lower-level codes that require less time and simpler assessments. It typically includes multiple diagnoses, medication management, or test interpretation, leading to higher reimbursement and more detailed documentation requirements.
| Code | Complexity | Description |
|---|---|---|
| 94726-CPT | Low | Whole-Body Air Volume Test, An Air Volume Test Measures Changes In The Amount Of Air Circulating In The Body While A Person Breathes. A Whole-Body Test Is Done In A Pressurized Room. The Test Is Called Plethysmography. |
| 94727-CPT | Low | Gas Dilution Or Washout For De, Gas Dilution Or Washout For Determination Of Lung Volumes And When Performed Distribution Of Ventilation And Closing Volumes |
| 94728-CPT | Low | Airway Resistance Test, A Measure Of Airway Resistance (Ability Of Air To Flow Through). |
| 94729-CPT | Low | Gas Transfer Ability Test, A Test Of The Ability Of The Lung To Move Gases Through Its Tissues (Transfer). The Test Uses A Small Amount Of Carbon Monoxide. |
What is a fee schedule?
A fee schedule is a list of fixed prices that healthcare providers charge for specific services, including CPT 94729. These prices vary depending on payer type (Medicare, Medicaid, private insurance), geographic location, and provider contracts.
Understanding the 94729 fee schedule helps patients estimate costs and providers optimize billing for accurate reimbursements.
Factors that affect fee schedules
Medicare & Medicaid Rates
Government-set reimbursement amounts
Private Insurance Rates
Negotiated rates between providers and insurance companies
Geographic Location
Costs may be higher in urban areas.
Provider Type
Hospital providers may have different rates than private practice.
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Frequently Asked Questions
CPT 94729 is an add-on code for measuring diffusing capacity (DLCO), which tests how well the lungs move gas into the blood using a small amount of carbon monoxide.
It is reported in addition to a primary pulmonary function test, such as spirometry (94010 or 94060) or lung volume testing (94726 to 94728).
Medicare pays CPT 94729 under the Physician Fee Schedule. The non-facility rate applies when the service is done in an office and covers the practice's staff, supplies and equipment; the lower facility rate applies in a hospital or surgery center, which bills its own facility fee. Both are adjusted for the local cost of practice. Commercial payers negotiate their own rates, often as a percentage of Medicare, so the same code can pay very differently from one contract to the next.
This page lists the rates commercial payers have published for CPT 94729 in their Transparency in Coverage files, so you can compare payers and see where a contract falls. For government benchmarks, PayerPrice also has the Medicare fee schedule lookup and Medicaid fee schedules by state.