Kathryn Sierra
NPI 1508743253 · Family Nurse Practitioner · Madera, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kathryn Sierra is a Family Nurse Practitioner provider in Madera, CA (NPI 1508743253).
Provider details
- NPI number
- 1508743253
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 95035649 (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
Under 1 yr in 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
- 2025-08-16
- Last updated
- 2025-09-16
- Certified
- 2025-09-16
Frequently asked questions
- What is Kathryn Sierra's NPI number?
- Kathryn Sierra's National Provider Identifier (NPI) is 1508743253, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kathryn Sierra's specialty?
- Kathryn Sierra is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Kathryn Sierra located?
- Kathryn Sierra's practice location on file with NPPES is 344 E 6th St, Madera, CA 93638-3631.
- What is Kathryn Sierra's phone number?
- The practice phone number listed in the NPPES registry for Kathryn Sierra is (559) 664-4000.
- Does Kathryn Sierra accept Medicare?
- Kathryn Sierra is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kathryn Sierra's NPI active?
- Yes — Kathryn Sierra's NPI (1508743253) is active in the NPPES registry as of the last update on 2025-09-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.