Mary Kay Esswein, CPNP, MSN
NPI 1588819098 · Pediatric Nurse Practitioner · Fullerton, CA
Mary Kay Esswein, CPNP, MSN is a Pediatric Nurse Practitioner provider in Fullerton, CA (NPI 1588819098).
Provider details
- NPI number
- 1588819098
- Entity type
- Individual
- Primary specialty
- Pediatric Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CPNP, MSN
- Sex
- Female
- Sole proprietor
- No
- License
- 255249 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-11-25
- Last updated
- 2009-01-27
Frequently asked questions
- What is Mary Kay Esswein's NPI number?
- Mary Kay Esswein's National Provider Identifier (NPI) is 1588819098, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Kay Esswein's specialty?
- Mary Kay Esswein is listed in the NPPES registry with a primary specialty of Pediatric Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Kay Esswein located?
- Mary Kay Esswein's practice location on file with NPPES is 3232 Topaz Lane, Fullerton, CA 92831.
- What is Mary Kay Esswein's phone number?
- The practice phone number listed in the NPPES registry for Mary Kay Esswein is (714) 579-1549.
- Is Mary Kay Esswein's NPI active?
- Yes — Mary Kay Esswein's NPI (1588819098) is active in the NPPES registry as of the last update on 2009-01-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.