Dr. Michael R. Hahn II, M.D.
Neurosurgery (Neurological Surgery Physician)
- Medicare participating
At a glance
- Medical school
- University of Oklahoma College of Medicine (1992)
- Years since graduation
- 34
- In the NPI registry since
- 2005
- Medicare patients seen, 2024
- 657
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. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 1992Medical school: University of Oklahoma College of Medicine
- 2005Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
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
-
Neurological Surgery Physician primary
OK license 18431 -
Specialist
OK license 18431
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Ssm Health St Anthony Hospital - Oklahoma City Oklahoma City, OK
- Memorial Health Lawton, OK
- Ssm Health St Anthony Hospital - Shawnee Shawnee, OK
- Ssm Health St Anthony Hospital - Midwest Midwest City, OK
- Duncan Regional Hospital, Inc Duncan, OK
Medical groups
- Saints Medical Group, LLC (435 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
- 657
- Services billed
- 1,801
- Patients’ average age
- 73
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 20-29 minutes | 443 | 298 |
| New patient office or other outpatient visit, 45-59 minutes | 244 | 243 |
| Established patient office or other outpatient visit, 30-39 minutes | 231 | 185 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 105 | 43 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 55 | 54 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 52 | 24 |
| Insertion of cage or mesh device to spine bone and disc space during spine fusion | 49 | 39 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 44 | 44 |
| Fusion of spine in lower back with partial removal of spine bone and disc | 44 | 43 |
| Partial removal of bone of single segment of spine in lower back with release of spinal cord and/or nerves during fusion of spine in lower back | 40 | 39 |
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 |
|---|---|
| Cyclobenzaprine Hcl Other prescribers in Oklahoma City, OK | 84 |
| Hydrocodone-Acetaminophen (hydrocodone/acetaminophen) Other prescribers in Oklahoma City, OK | 81 |
| Oxycodone-Acetaminophen (oxycodone hcl/acetaminophen) Other prescribers in Oklahoma City, OK | 70 |
| Tizanidine Hcl Other prescribers in Oklahoma City, OK | 41 |
| Gabapentin Other prescribers in Oklahoma City, OK | 18 |
| Oxycodone Hcl Other prescribers in Oklahoma City, OK | 18 |
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 16 payments worth $760 in total to this clinician.
| Medtronic, Inc. | $740 |
|---|---|
| Vertex Pharmaceuticals Incorporated | $19.38 |
| Food and Beverage | $760 |
|---|
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.