Dr. Ryan M. Acker, DO
Emergency Medicine (Emergency Medicine Physician)
- Medicare participating
At a glance
- Medical school
- Oklahoma State University College of Osteopathic Medicine (2022)
- Years since graduation
- 4
- In the NPI registry since
- 2021
- Medicare patients seen, 2024
- 26
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. What an NPI is
Education and training
- 2022Medical school: Oklahoma State University College of Osteopathic Medicine
- 2021Registered with an NPI (national billing number; not a license date)
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Emergency Medicine Physician primary
OK license 8063 - Student in an Organized Health Care Education/Training Program
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Saint Francis Hospital, Inc Tulsa, OK
- Cherokee Nation W W Hastings Indian Hospital Tahlequah, OK
- Stillwater Medical Center Stillwater, OK
- Hillcrest Hospital Cushing Cushing, OK
- Cleveland Area Hospital Cleveland, OK
Medical groups
- Cherokee Nation (449 clinicians)
- Ies Er Oklahoma LLC (143 clinicians)
- South Central Emergency Services, PC (55 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 26
- Services billed
- 39
- Patients’ average age
- 67
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Cephalexin Other prescribers in Tulsa, OK | 22 |
| Meloxicam Other prescribers in Tulsa, OK | 17 |
| Prednisone Other prescribers in Tulsa, OK | 16 |
| Doxycycline Hyclate Other prescribers in Tulsa, OK | 13 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 2 companies reported 4 payments worth $320 in total to this clinician.
| Vertex Pharmaceuticals Incorporated | $245 |
|---|---|
| Abiomed | $74.42 |
| Food and Beverage | $320 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.