Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Ruben Ruiz, MD

Individual provider Specialist · NPI 1912901471

Dr. Ruben Ruiz, MD is an Internal Medicine in Rialto, California. Graduated from University of California, Geffen School of Medicine in 1982, 44 years ago. Practices with Ruben Ruiz M D a Medical Corporation, a 2-clinician group and works from 4 locations. Licensed in California.

Years since qualifying
44
Trained at
University of California, Geffen School of Medicine
Licensed in
CA
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

436 S Riverside Ave
Rialto, CA 92376
Phone: (909) 877-8868
Fax: (909) 877-0008
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 901 W Whittier Blvd, Montebello, CA 90640-4737 — (323) 728-8588
  • 833 W Whittier Blvd, Montebello, CA 90640-4735 — (323) 712-4811
  • 403 W F St, Ontario, CA 91762-3207 — (909) 988-3288

Specialties & licences

Specialist (primary) Taxonomy 174400000X · Licence G052245 (CA)

Record details

NPI number1912901471
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 10, 2005
Last updated in NPPESJanuary 16, 2019
Mailing address833 W Whittier Blvd, Montebello, CA 90640-4735

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF CALIFORNIA, GEFFEN SCHOOL OF MEDICINE
Graduated 1982 (44 years in practice)
Group practice Ruben Ruiz M D A Medical Corporation — 2 clinicians
Accepts Medicare assignment Not indicated
Practice locations3 on file with Medicare

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