Quick answers
- Which hospitals does Mark Stephens work at?
- Medicare's official clinician data lists Mark Stephens at 1 hospital: Mercy Hospital Oklahoma City, Inc. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark Stephens see patients?
- Medicare's clinician data lists 1 practice location in Oklahoma City, OK. Call before your visit to confirm the address.
- What is Mark Stephens's specialty?
- Medicare lists Neurosurgery as the primary specialty.
- Does Mark Stephens accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Stephens 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 Mark Stephens?
- (405) 302-2661, as listed in official Medicare / NPI Registry data.
- What is Mark Stephens's NPI number?
- 1093370603. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark Stephens works
Medicare's Facility Affiliation Data lists Mark Stephens 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
Practice locations
Addresses where Mark Stephens is enrolled with Medicare (CMS data updated 2026-10-02).
- 4120 W Memorial Rd, Suite 218Oklahoma City, OK 73120 (405) 302‑2661
Group practices
Medicare enrollment lists Mark Stephens as a member of this group (CMS data updated 2026-10-02).
- Mercy Clinic Oklahoma Communities649 clinicians in the group
Specialties
- Neurosurgeryprimary
Other neurosurgeons in Oklahoma City
Clinicians with the same Medicare primary specialty in Oklahoma City, OK — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1093370603 |
| 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