Quick answers
- Which hospitals does Michael J. Keefer work at?
- Medicare's official clinician data lists Michael J. Keefer at 5 hospitals: Mercy Hospital Ardmore, Inc, Mercy Hospital Logan County, Mercy Hospital Oklahoma City, Inc, O U Medical Center and Oklahoma Heart Hospital, LLC. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Michael J. Keefer see patients?
- Medicare's clinician data lists 4 practice locations, including Oklahoma City, OK. Call before your visit to confirm the address.
- What is Michael J. Keefer's specialty?
- Medicare lists Medical Oncology as the primary specialty.
- Does Michael J. Keefer accept Medicare assignment?
- Yes. Medicare's clinician data says Michael J. Keefer accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Michael J. Keefer offer telehealth?
- Medicare's clinician data says Michael J. Keefer offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Michael J. Keefer?
- (405) 936-5455, as listed in official Medicare / NPI Registry data.
- What is Michael J. Keefer's NPI number?
- 1386697548. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Michael J. Keefer works
Medicare's Facility Affiliation Data lists Michael J. Keefer at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Hospital Ardmore, IncArdmore, OK · Acute Care Hospital · CCN 370047
- Mercy Hospital Logan CountyGuthrie, OK · Critical Access Hospital · CCN 371317
- Mercy Hospital Oklahoma City, IncOklahoma City, OK · Acute Care Hospital · CCN 370013
- O U Medical CenterOklahoma City, OK · Acute Care Hospital · CCN 370093
- Oklahoma Heart Hospital, LLCOklahoma City, OK · Acute Care Hospital · CCN 370215
Practice locations
Addresses where Michael J. Keefer is enrolled with Medicare (CMS data updated 2026-10-02).
- 4300 McAuley BlvdOklahoma City, OK 73120 (405) 936‑5455
- 4300 W Memorial RdOklahoma City, OK 73120 (405) 755‑1515
- 4401 McAuley Blvd, Suite 2700Oklahoma City, OK 73120 (405) 751‑4343
- 5200 E I 240 Service Rd, Suite 330Oklahoma City, OK 73135 (405) 755‑4290
Group practices
Medicare enrollment lists Michael J. Keefer as a member of this group (CMS data updated 2026-10-02).
- Mercy Clinic Oklahoma Communities649 clinicians in the group
Specialties
- Medical Oncologyprimary
Other oncologists in Oklahoma City
Clinicians with the same Medicare primary specialty in Oklahoma City, OK — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Oklahoma College Of Medicine |
| Graduation year | 1981 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1386697548 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians