Quick answers
- Where does Mark Shafik see patients?
- Medicare's clinician data lists 9 practice locations, including Riverside, CA, Glendora, CA and Calabasas, CA. Call before your visit to confirm the address.
- What is Mark Shafik's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Mark Shafik accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Shafik 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 Shafik?
- (951) 353-2000, as listed in official Medicare / NPI Registry data.
- What is Mark Shafik's NPI number?
- 1376685867. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Mark Shafik is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 9; the Medicare profile lists all.
- 10800 Magnolia AveRiverside, CA 92505 (951) 353‑2000
- 1365 S Grand AveGlendora, CA 91740 (626) 385‑1456
- 26777 Agoura Rd, Suite B4Calabasas, CA 91302 (818) 880‑2225
- 28110 Clinton Keith RdMurrieta, CA 92563 (951) 436‑0777
- 29400 Rancho California RdTemecula, CA 92591 (951) 595‑8282
Group practices
Medicare enrollment lists Mark Shafik as a member of these groups (CMS data updated 2026-10-02).
- Southern California Permanente Medical Group11,293 clinicians in the group
- Exer Medical Corporation340 clinicians in the group
- Emergency Physicians Urgent Care Inc140 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Riverside
Clinicians with the same Medicare primary specialty in Riverside, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2005 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1376685867 |
| 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
- 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