Quick answers
- Which hospitals does Mark Fleming work at?
- Medicare's official clinician data lists Mark Fleming at 2 hospitals: Los Angeles General Medical Center and Providence St Mary Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark Fleming see patients?
- Medicare's clinician data lists 1 practice location in Apple Valley, CA. Call before your visit to confirm the address.
- What is Mark Fleming's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty.
- Does Mark Fleming accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Fleming 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 Fleming?
- (407) 335-6950, as listed in official Medicare / NPI Registry data.
- What is Mark Fleming's NPI number?
- 1881638583. 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 Fleming works
Medicare's Facility Affiliation Data lists Mark Fleming at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Los Angeles General Medical CenterLos Angeles, CA · Acute Care Hospital · CCN 050373
- Providence St Mary Medical CenterApple Valley, CA · Acute Care Hospital · CCN 050300
Practice locations
Addresses where Mark Fleming is enrolled with Medicare (CMS data updated 2026-10-02).
- 18523 Corwin Rd, Suite AApple Valley, CA 92307 (407) 335‑6950
Group practices
Medicare enrollment lists Mark Fleming as a member of this group (CMS data updated 2026-10-02).
- Paul J Wisniewski DO Inc19 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Apple Valley
Clinicians with the same Medicare primary specialty in Apple Valley, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1999 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1881638583 |
| 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