Quick answers
- Which hospitals does John S. Marouk work at?
- Medicare's official clinician data lists John S. Marouk at 5 hospitals: Cleveland Area Hospital, Hillcrest Hospital South, Hillcrest Medical Center, Oklahoma Surgical Hospital, LLC and Saint Francis Hospital, Inc. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John S. Marouk see patients?
- Medicare's clinician data lists 1 practice location in Tulsa, OK. Call before your visit to confirm the address.
- What is John S. Marouk's specialty?
- Medicare lists Neurosurgery as the primary specialty.
- Does John S. Marouk accept Medicare assignment?
- Yes. Medicare's clinician data says John S. Marouk 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 S. Marouk?
- (918) 492-7587, as listed in official Medicare / NPI Registry data.
- What is John S. Marouk's NPI number?
- 1427099035. 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 S. Marouk works
Medicare's Facility Affiliation Data lists John S. Marouk at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cleveland Area HospitalCleveland, OK · Critical Access Hospital · CCN 371320
- Hillcrest Hospital SouthTulsa, OK · Acute Care Hospital · CCN 370202
- Hillcrest Medical CenterTulsa, OK · Acute Care Hospital · CCN 370001
- Oklahoma Surgical Hospital, LLCTulsa, OK · Acute Care Hospital · CCN 370210
- Saint Francis Hospital, IncTulsa, OK · Acute Care Hospital · CCN 370091
Practice locations
Addresses where John S. Marouk is enrolled with Medicare (CMS data updated 2026-10-02).
- 6767 S Yale Ave, Suite ATulsa, OK 74136 (918) 492‑7587
Group practices
Medicare enrollment lists John S. Marouk as a member of this group (CMS data updated 2026-10-02).
- Neurological Surgery Inc11 clinicians in the group
Specialties
- Neurosurgeryprimary
Other neurosurgeons in Tulsa
Clinicians with the same Medicare primary specialty in Tulsa, OK — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Oklahoma State University College Of Osteopathic Medicine |
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1427099035 |
| 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