Quick answers
- Which hospitals does John B. Marlar work at?
- Medicare's official clinician data lists John B. Marlar at 1 hospital: Holdenville General Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John B. Marlar see patients?
- Medicare's clinician data lists 1 practice location in Holdenville, OK. Call before your visit to confirm the address.
- What is John B. Marlar's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does John B. Marlar accept Medicare assignment?
- Yes. Medicare's clinician data says John B. Marlar 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 John B. Marlar?
- (405) 379-4200, as listed in official Medicare / NPI Registry data.
- What is John B. Marlar's NPI number?
- 1316923576. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John B. Marlar works
Medicare's Facility Affiliation Data lists John B. Marlar at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Holdenville General HospitalHoldenville, OK · Critical Access Hospital · CCN 371321
Practice locations
Addresses where John B. Marlar is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 McDougal DrHoldenville, OK 74848 (405) 379‑4200
Group practices
Medicare enrollment lists John B. Marlar as a member of this group (CMS data updated 2026-10-02).
- Holdenville Hospital Authority10 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Oklahoma
Clinicians with the same Medicare primary specialty in Oklahoma — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 1992 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1316923576 |
| 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