# CPT 91038: Esophageal function test, prolonged, greater than 1 hour

Medicare CPT 91038 pays $445.90 in a non-facility setting and $445.90 in a facility setting under the 2026 Medicare Physician Fee Schedule, before geographic adjustment. After geographic adjustment, state amounts run from $387.29 in Arkansas to $520.54 in District of Columbia, a 34% spread.

Web page: https://www.med-reveal.com/rates/91038-cpt-fee-schedule
Section: Medical and Therapeutic Services
Billed by: Gastroenterology

## Medicare rates

| | Amount |
| --- | --- |
| National non-facility | $445.90 |
| National facility | $445.90 |
| Conversion factor | 33.4009 |
| Release | 2026 Q4 (effective 2026-10-01) |

## By state

| State | Non-facility | Facility |
| --- | --- | --- |
| District of Columbia | $520.54 | $520.54 |
| California | $520.49 | $520.49 |
| Washington | $503.40 | $503.40 |
| Hawaii | $500.47 | $500.47 |
| New Jersey | $499.24 | $499.24 |
| Massachusetts | $496.73 | $496.73 |
| New York | $495.59 | $495.59 |
| Alaska | $489.49 | $489.49 |
| Connecticut | $478.50 | $478.50 |
| Colorado | $471.77 | $471.77 |
| Oregon | $467.21 | $467.21 |
| Maryland | $463.87 | $463.87 |
| New Hampshire | $462.23 | $462.23 |
| Rhode Island | $459.73 | $459.73 |
| Minnesota | $455.81 | $455.81 |
| Puerto Rico | $450.33 | $450.33 |
| Virgin Islands | $450.33 | $450.33 |
| Florida | $449.79 | $449.79 |
| Montana | $445.90 | $445.90 |
| Nevada | $445.86 | $445.86 |
| Wyoming | $445.21 | $445.21 |
| North Dakota | $444.31 | $444.31 |
| South Dakota | $444.13 | $444.13 |
| Delaware | $440.94 | $440.94 |
| Vermont | $440.52 | $440.52 |
| Texas | $439.62 | $439.62 |
| Virginia | $438.21 | $438.21 |
| Pennsylvania | $438.09 | $438.09 |
| Illinois | $434.75 | $434.75 |
| Arizona | $432.92 | $432.92 |
| Georgia | $427.78 | $427.78 |
| Wisconsin | $426.98 | $426.98 |
| Maine | $426.82 | $426.82 |
| Michigan | $422.20 | $422.20 |
| Utah | $421.24 | $421.24 |
| North Carolina | $417.70 | $417.70 |
| Indiana | $414.85 | $414.85 |
| South Carolina | $414.61 | $414.61 |
| Nebraska | $412.94 | $412.94 |
| New Mexico | $412.70 | $412.70 |
| Missouri | $412.39 | $412.39 |
| Idaho | $411.97 | $411.97 |
| Louisiana | $410.66 | $410.66 |
| Ohio | $410.56 | $410.56 |
| Iowa | $409.74 | $409.74 |
| Tennessee | $407.67 | $407.67 |
| Kansas | $405.55 | $405.55 |
| Oklahoma | $401.81 | $401.81 |
| Kentucky | $400.55 | $400.55 |
| Alabama | $393.93 | $393.93 |
| West Virginia | $393.80 | $393.80 |
| Mississippi | $388.70 | $388.70 |
| Arkansas | $387.29 | $387.29 |

## Related codes

- 91010: Esophageal motility study — https://www.med-reveal.com/rates/91010-cpt-fee-schedule
- 91013: Esophageal motility study with stimulation or perfusion (add-on) — https://www.med-reveal.com/rates/91013-cpt-fee-schedule
- 91020: Gastric motility studies — https://www.med-reveal.com/rates/91020-cpt-fee-schedule
- 91022: Duodenal motility study — https://www.med-reveal.com/rates/91022-cpt-fee-schedule
- 91030: Esophagus, acid perfusion (Bernstein) test — https://www.med-reveal.com/rates/91030-cpt-fee-schedule
- 91034: Esophageal pH monitoring, prolonged, catheter placement — https://www.med-reveal.com/rates/91034-cpt-fee-schedule
- 91035: Esophageal pH monitoring, prolonged, mucosal attached telemetry — https://www.med-reveal.com/rates/91035-cpt-fee-schedule
- 91040: Esophageal balloon distension provocation study — https://www.med-reveal.com/rates/91040-cpt-fee-schedule

Commercial negotiated rates for 91038 by payer and state: https://www.med-reveal.com/solutions/rate-benchmarking

## Sources

- CMS Medicare fee schedules (2026 Q4): https://www.cms.gov/medicare/payment/fee-schedules