Clinicians affiliated with Gastroenterology Specialists, Inc.
23 clinicians on file with this group · most practice in Tulsa, OK · PAC ID 0446251664
20 clinicians affiliated with Gastroenterology Specialists, Inc. are in the 2024 Medicare Part B data, 8 of them physicians. Data years with affiliated clinicians: 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024.
Each clinician's exact figures are in their Physician Report, from their page; a specialty's figures in this market are in a Market Comparison. View sample report · Already purchased? Open your report
Affiliated clinicians by specialty, 2024
All specialties · Gastroenterology (8) · Certified Registered Nurse Anesthetist (CRNA) (7) · Nurse Practitioner (5)
Specialty links go to the specialty in Tulsa, OK.
Clinicians affiliated with Gastroenterology Specialists, Inc., 2024
Alphabetical by last name; 20.
| Name | Specialty | City |
|---|---|---|
| Aubrey Ballard, CRNA | Certified Registered Nurse Anesthetist (CRNA) | Tulsa, OK |
| Jeffrey L Bigler, M.D. | Gastroenterology | Tulsa, OK |
| William K Briggs, M.D. | Gastroenterology | Tulsa, OK |
| Rachel Carney, APRN-CRNA | Certified Registered Nurse Anesthetist (CRNA) | Broken Arrow, OK |
| Mary C Chelf | Nurse Practitioner | Tulsa, OK |
| James C Duncan, CRNA | Certified Registered Nurse Anesthetist (CRNA) | Tulsa, OK |
| Aaron P Fieker, D.O. | Gastroenterology | Tulsa, OK |
| Geoffrey A Fillmore, D.O. | Gastroenterology | Tulsa, OK |
| Melissa A Gilkison, APRN-CRNA | Certified Registered Nurse Anesthetist (CRNA) | Tulsa, OK |
| Scott E Hendrickson, DO | Gastroenterology | Tulsa, OK |
| John R Hood, M.D. | Gastroenterology | Tulsa, OK |
| Lora B Horton, APRN NP-C | Nurse Practitioner | Tulsa, OK |
| Lisa M Johnson | Nurse Practitioner | Bartlesville, OK |
| Lizabeth E Malik, CRNA | Certified Registered Nurse Anesthetist (CRNA) | Tulsa, OK |
| Michael J Martin, M.D. | Gastroenterology | Tulsa, OK |
| Katherine Mcelroy, CRNA | Certified Registered Nurse Anesthetist (CRNA) | Joplin, MO |
| Courtney Myers, APRN | Nurse Practitioner | Tulsa, OK |
| Kristina Rogers, APRN, CNP | Nurse Practitioner | Tulsa, OK |
| Roy L Thompson, M.D. | Gastroenterology | Tulsa, OK |
| Xian Zhang, CRNA | Certified Registered Nurse Anesthetist (CRNA) | Tulsa, OK |
Practice locations
Listed practice locations in Oklahoma.
Source: CMS Doctors and Clinicians National Downloadable File, snapshot October 2, 2026.
Membership comes from the CMS Doctors and Clinicians file. CMS does not publish an end-of-year archive of it, so the current snapshot is applied to every data year. A clinician affiliated with several groups or hospitals appears on each of their pages. How group pages are built · Limitations