Mary Catherine Diaz, FNP-C
NPI 1780406025 · Family Nurse Practitioner · Atascadero, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Catherine Diaz, FNP-C is a Family Nurse Practitioner provider in Atascadero, CA (NPI 1780406025).
Provider details
- NPI number
- 1780406025
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-C
- Sex
- Female
- Sole proprietor
- No
- License
- 741804 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
1 yr 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
- 2024-10-28
- Last updated
- 2026-05-21
- Certified
- 2026-05-21
Frequently asked questions
- What is Mary Catherine Diaz's NPI number?
- Mary Catherine Diaz's National Provider Identifier (NPI) is 1780406025, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Catherine Diaz's specialty?
- Mary Catherine Diaz is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Catherine Diaz located?
- Mary Catherine Diaz's practice location on file with NPPES is 10333 El Camino Real, Atascadero, CA 93422-5808.
- What is Mary Catherine Diaz's phone number?
- The practice phone number listed in the NPPES registry for Mary Catherine Diaz is (805) 468-2000.
- Does Mary Catherine Diaz accept Medicare?
- Mary Catherine Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Catherine Diaz's NPI active?
- Yes — Mary Catherine Diaz's NPI (1780406025) is active in the NPPES registry as of the last update on 2026-05-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.