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

Dr. Marissa M. Mariano-Mejia, MD

Individual provider Geriatric Psychiatry Physician · NPI 1750426862

Dr. Marissa M. Mariano-Mejia, MD is a Geriatric Psychiatry Physician in Rialto, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2007
Specialties on file
2
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

850 E Foothill Blvd
Rialto, CA 92376-5230
Phone: (909) 421-9280
Fax: (909) 421-9219
Show map & directions

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

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence A56023 (CA)
Geriatric Psychiatry Physician Taxonomy 2084P0805X · Licence A56023 (CA)

Record details

NPI number1750426862
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedFebruary 20, 2007
Last updated in NPPESFebruary 23, 2021
Certification dateFebruary 23, 2021