Doctors That Accept Medicare in Grand Terrace, CA

45 Medicare-enrolled clinicians · CMS data, refreshed 2026-06-26

These are 45 clinicians enrolled in Medicare and practicing in Grand Terrace, grouped by specialty below. Being enrolled means they can bill Original Medicare for your care. Most also accept assignment — they take Medicare's approved amount as full payment, so you only owe your deductible and 20% coinsurance. Call first to confirm they're accepting new Medicare patients.

Providers in Grand Terrace by Specialty

Family Medicine(6)

Cassidy Koo, MD
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Damian Ray, MD
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Diana Plucker, MD
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Ebrahim Mohamedy, MD
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
George Girgis, MD
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Oluwatoni Arene, MD
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment

Internal Medicine(1)

Dalia Zaky Dawoud, MD
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment

Optometry(5)

Chad Stockert, OD
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Jean Dinh, OD
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Nha Han Nguyen, OD
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Sameera Ahmad, OD
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
William Park, OD
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment

Podiatry(2)

Brian Haven, DPM
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Kendall Shumway, DPM
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment

Physical Therapist(2)

Richard Ortiz, PT
22908 Wren St, Grand Terrace92313
May accept assignment
Richard Ortiz, PT
22908 Wren St, Grand Terrace92313
May accept assignment

Nurse Practitioner(18)

Lindy Legoh, NP
11819 Greenbrier Ln, Grand Terrace92313
Accepts assignment
Tarrah Tokishi
Evergreen Spine And Pain Centers
12000 Mount Vernon Ave, Grand Terrace92313
📞 (949) 414-7246Accepts assignment
April Figueroa, NP
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Ashley Fonseca-Tweed, NP
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Cimarron Smith, NP
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Comfort Sofayo-Layton, NP
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Craig Callam, NP
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Elpidio Querubin, NP
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Eric Eschweiler, NP
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
James White, NP
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Jessica Talbot, NP
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Lauren Scarponi
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Margaret Amoo, NP
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Margaret Turkson, NP
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Mary Sandoval, NP
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Ngoc Nguyen, NP
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Ruth Ogot, NP
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Valerie White, NP
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment

Psychiatry(2)

Arthur Leitzke, MD
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment
Robert Norman, MD
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment

Clinical Psychologist(1)

John Davis, CP
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment

Physical Medicine & Rehabilitation(1)

Donald Hamby, DO
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment

Mental Health Counselor(1)

Tana Szoyka
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment

Nephrology(1)

James Tomas, MD
Riverside-San Bernardino County Indian Health Inc
11980 Mount Vernon Ave, Grand Terrace92313
📞 (909) 864-1097Accepts assignment

Chiropractic(1)

Zakari Bissani, CH
12139 Mount Vernon Ave, Suite 100, Grand Terrace92313
📞 (909) 783-4950Accepts assignment

Occupational Therapist(1)

Sheila Jones-Lilley
Total Care Physical Therapy Inc
12139 Mount Vernon Ave, Suite 110, Grand Terrace92313
📞 (909) 370-3396May accept assignment

Marriage & Family Therapist(1)

Samantha Gonzalez
22342 Grand Terrace Rd, Grand Terrace92313
May accept assignment

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Frequently Asked Questions

Are these doctors in Grand Terrace accepting new Medicare patients?

We can't say for sure — CMS's enrollment data confirms a provider is enrolled in Medicare, not whether their practice is currently open to new patients. Call first to confirm they're accepting new Medicare patients before you book.

What does "accepts Medicare assignment" mean?

It means the provider takes Medicare's approved amount as full payment for a covered service, so you only owe your normal deductible and 20% coinsurance — no extra charges. A provider marked "may accept assignment" can go either way, so ask when you call.

Will these doctors work with my Medicare Advantage plan?

Not necessarily. This directory is built from Medicare enrollment data, which applies to Original Medicare. If you have a Medicare Advantage plan, your plan's own network determines who's covered — check your plan's directory first, then confirm with the office directly.

Does Original Medicare cover dental care from these providers?

Original Medicare does not cover routine dental care like cleanings, fillings, or dentures. Some Medicare Advantage plans include dental benefits. See our guide on what Medicare does and doesn't cover for dental.

Provider data from the CMS Doctors and Clinicians National Downloadable File, refreshed 2026-06-26. Directory information only, not medical or insurance advice. View all Medicare doctors in California →