Ruben Ruiz, M.D.
Family medicine physicianConcierge
Clinica Medica Familiar · Ontario, CA
Jose A. Banuelos, PMHNP-BC
Psychiatry nurse practitionerConcierge
Prudent Psychiatry · Ontario, CA
Judith Anugom, PMHNP-BC
Psychiatric nurse practitionerConcierge
Prudent Psychiatry · Ontario, CA
- Medication management
Weiguo Zhu, MD
Psychiatry physicianConcierge
Prudent Psychiatry · Ontario, CA
Medical school Shanghai Medical University
Training Internship and residency, Harbor-UCLA
Marianna Chavez, PMHNP-BC
Psychiatry nurse practitionerConcierge
Restore Psychiatry and Wellness · Ontario, CA
Heidi Regenass, MD
Aesthetic medicine physicianConcierge
Serenite Wellness Medicine · Ontario, CA
- Anti-aging medicine
- Aesthetic treatments
- Regenerative plastic surgery
Felista A. Anugom, DNP
Psychiatry nurse practitionerConcierge
Prudent Psychiatry · Ontario, CA
Graduate school Missouri State University
Training Primary care psychiatry, University of California Davis
- Addiction medicine
- Pain management
Ador Mansat, DNP
Aesthetic Medicine nurse practitionerConcierge
Serenite Wellness Medicine · Ontario, CA
- Wellness challenge coaching
Nearby doctors
These doctors practice in towns close to Ontario. They are not counted above.
Michael Chai, MD
Internal Medicine physicianConcierge
Michael Chai, MD, Inc · Upland, CA
- Concierge primary care
- Geriatric care
Jonathan Siu, DO
Family Medicine physicianDPC
Forte Health Medical Clinic · Upland, CA
Medical school Touro University
- Family medicine
- Sports medicine
George Mousa, MD
Internal Medicine physicianConcierge
Dr. Mousa Primary Care · Upland, CA
Medical school University of Medicine in Aleppo, Syria
- Internal medicine for adults
- Preventive medicine
- Chronic disease management
Pomona Valley Health Centers · Claremont, CA
Medical school University of Guadalajara School of Medicine
Training Family medicine, Pomona Valley Hospital Medical Center
- Family medicine
- Women's health
- Obstetrics
Christina Tolentino, DO
Family Medicine physicianConcierge
Pomona Valley Health Centers · Claremont, CA
Medical school Western University of Health Sciences
- Family medicine
- Women's health
- Illness and injury care
Pomona Valley Health Centers · La Verne, CA
Medical school University of Southern California School of Medicine
Training Pomona Valley Hospital Medical Center
- Care for all ages
- Occupational medicine
- Injured worker care
Pomona Valley Health Centers · La Verne, CA
Medical school Juan N. Corpas School of Medicine, Bogota, Colombia
Training Family medicine, Pomona Valley Hospital Medical Center
- Family medicine
- Pediatric care
- Geriatric care
Alaa Hajal, MD
Internal Medicine physicianConcierge
La Vista Medical Center · Diamond Bar, CA
Medical school Damascus University
Training St. John Hospital, Detroit, Michigan
- Adult internal medicine
Truong son Nguyen
Family Medicine clinicianDPC
Walnut Health Direct Primary Care · Diamond Bar, CA
Pomona Valley Health Centers · Chino Hills, CA
Medical school Albany Medical College
Training Family medicine, Pomona Valley Hospital Medical Center
- Family medicine
- Pediatric care
- Women's health
CARE Fertility · Upland, CA
Medical school UCLA School of Medicine
Training Obstetrics and Gynecology, Glendale Adventist Medical Center
Compare cash-pay doctors in Ontario, CA
Same order as the list above. A comparison, not a ranking.
| Doctor | Type | Training | Reviews |
|---|---|---|---|
| Ruben Ruiz, M.D. | Concierge · Family medicine physician | ||
| Jose A. Banuelos, PMHNP-BC | Concierge · Psychiatry nurse practitioner | ||
| Judith Anugom, PMHNP-BC | Concierge · Psychiatric nurse practitioner | ||
| Weiguo Zhu, MD | Concierge · Psychiatry physician | Internship and residency, Harbor-UCLA | |
| Marianna Chavez, PMHNP-BC | Concierge · Psychiatry nurse practitioner | ||
| Heidi Regenass, MD | Concierge · Aesthetic medicine physician | ||
| Felista A. Anugom, DNP | Concierge · Psychiatry nurse practitioner | Primary care psychiatry, University of California Davis | |
| Ador Mansat, DNP | Concierge · Aesthetic Medicine nurse practitioner |
Questions about cash-pay doctors in Ontario, CA
How many cash-pay doctors are in Ontario?
FindMyDirectDoctor lists 8 cash-pay doctors in Ontario, CA at 4 practices. 8 are concierge doctors. We last checked this list in November 2026.
Which specialties can I find?
The most common are psychiatry (5), aesthetic medicine (2), and family medicine (1).
Are these doctors board certified?
We confirmed board certification for 4 doctors on this list. Each profile shows the board and the specialty.
Do these doctors take insurance?
It depends on the practice. Many direct primary care and concierge practices charge a membership fee instead of billing insurance for office visits, and some also accept insurance. Each profile says how its practice works when the practice states it.