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

Maristella J Cosip, FNP

Individual provider Family Medicine Physician · NPI 1386482503

Maristella J Cosip, FNP is a Family Medicine Physician in Ontario, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2024
What do these letters mean?
FNP — Family Nurse Practitioner
A nurse practitioner who treats patients of all ages, much like a family doctor.

See every abbreviation used in this directory →

Practice location Address checks out

2624 E Harper St
Ontario, CA 91762-7398
Phone: (909) 942-1864
Show map & directions

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

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 95026477 (CA)

Record details

NPI number1386482503
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP
Sole proprietorYes
NPI enumeratedJuly 20, 2024
Last updated in NPPESJuly 20, 2024
Certification dateJuly 20, 2024

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