Quick answers
- Which hospitals does Gregory B. Vanzant work at?
- Medicare's official clinician data lists Gregory B. Vanzant at 5 hospitals: Mercy Hospital Oklahoma City, Inc, Oklahoma Heart Hospital, LLC, Stillwater Medical - Perry, Stillwater Medical Center and Stillwater Medical-Blackwell. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory B. Vanzant see patients?
- Medicare's clinician data lists 2 practice locations, including Oklahoma City, OK. Call before your visit to confirm the address.
- What is Gregory B. Vanzant's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty, and also Internal Medicine.
- Does Gregory B. Vanzant accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory B. Vanzant 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.
- What is the phone number for Gregory B. Vanzant?
- (405) 608-3800, as listed in official Medicare / NPI Registry data.
- What is Gregory B. Vanzant's NPI number?
- 1932196839. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregory B. Vanzant works
Medicare's Facility Affiliation Data lists Gregory B. Vanzant at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Hospital Oklahoma City, IncOklahoma City, OK · Acute Care Hospital · CCN 370013
- Oklahoma Heart Hospital, LLCOklahoma City, OK · Acute Care Hospital · CCN 370215
- Stillwater Medical - PerryPerry, OK · Rural Emergency Hospital · CCN 370779
- Stillwater Medical CenterStillwater, OK · Acute Care Hospital · CCN 370049
- Stillwater Medical-BlackwellBlackwell, OK · Rural Emergency Hospital · CCN 370780
Practice locations
Addresses where Gregory B. Vanzant is enrolled with Medicare (CMS data updated 2026-10-02).
- 4050 W Memorial Rd, Fl 3Oklahoma City, OK 73120 (405) 608‑3800
- 4300 W Memorial RdOklahoma City, OK 73120 (405) 755‑1515
Group practices
Medicare enrollment lists Gregory B. Vanzant as a member of these groups (CMS data updated 2026-10-02).
- Ohh Physicians LLC133 clinicians in the group
- Mercy Hospital Oklahoma City, Inc37 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Oklahoma →
Other cardiologists in Oklahoma City
Clinicians with the same Medicare primary specialty in Oklahoma City, OK — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Nova Southeastern College Of Osteo Medicine |
| Graduation year | 1993 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1932196839 |
| 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