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

Mrs. Mary Kay Esswein, CPNP, MSN

Individual provider Pediatric Nurse Practitioner · NPI 1588819098

Mrs. Mary Kay Esswein, CPNP, MSN is a Pediatric Nurse Practitioner in Fullerton, California. Licensed in California. Registered with an NPI since 2008.

Licensed in
CA
In the registry since
2008
What do these letters mean?
CPNP — Certified Pediatric Nurse Practitioner
A nurse practitioner certified in paediatrics.
MSN — Master of Science in Nursing
A graduate nursing degree, usually held alongside an advanced practice licence.

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Practice location Address checks out

3232 Topaz Ln
Fullerton, CA 92831
Phone: (714) 579-1549
Show map & directions

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

Specialties & licences

Pediatric Nurse Practitioner (primary) Taxonomy 363LP0200X · Licence 255249 (CA)

Record details

NPI number1588819098
Entity typeIndividual (Type 1)
GenderFemale
Credentials CPNP , MSN
Sole proprietorNo
NPI enumeratedNovember 25, 2008
Last updated in NPPESJanuary 27, 2009

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