Quick answers
- Which hospitals does Mark D. Johnson work at?
- Medicare's official clinician data lists Mark D. Johnson at 3 hospitals: SSM Health St Anthony Hospital - Midwest, SSM Health St Anthony Hospital - Oklahoma City and Summit Medical Center, LLC. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark D. Johnson see patients?
- Medicare's clinician data lists 6 practice locations, including Oklahoma City, OK, Edmond, OK and Moore, OK. Call before your visit to confirm the address.
- What is Mark D. Johnson's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Mark D. Johnson accept Medicare assignment?
- Yes. Medicare's clinician data says Mark D. Johnson 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 D. Johnson?
- (405) 676-8643, as listed in official Medicare / NPI Registry data.
- What is Mark D. Johnson's NPI number?
- 1508855677. 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 D. Johnson works
Medicare's Facility Affiliation Data lists Mark D. Johnson at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- SSM Health St Anthony Hospital - MidwestMidwest City, OK · Acute Care Hospital · CCN 370094
- SSM Health St Anthony Hospital - Oklahoma CityOklahoma City, OK · Acute Care Hospital · CCN 370037
- Summit Medical Center, LLCEdmond, OK · Acute Care Hospital · CCN 370225
Practice locations
Addresses where Mark D. Johnson is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 1110 N Lee AveOklahoma City, OK 73103
- 12301 S Western Ave, Suite A3Oklahoma City, OK 73170 (405) 676‑8643
- 13401 N Western Ave, Suite 302Oklahoma City, OK 73114 (405) 272‑6685
- 2749 Progressive DrEdmond, OK 73034 (405) 772‑4130
- 608 NW 9th StOklahoma City, OK 73102
Group practices
Medicare enrollment lists Mark D. Johnson as a member of these groups (CMS data updated 2026-10-02).
- Saints Medical Group, LLC435 clinicians in the group
- Ortho Plus Holdings LLC5 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Oklahoma City
Clinicians with the same Medicare primary specialty in Oklahoma City, OK — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 1984 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1508855677 |
| 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