Margarita Lewis-Upton
NPI 1881426476 · Gerontology Nurse Practitioner · Fontana, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margarita Lewis-Upton is a Gerontology Nurse Practitioner provider in Fontana, CA (NPI 1881426476).
Provider details
- NPI number
- 1881426476
- Entity type
- Individual
- Primary specialty
- Gerontology Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- Yes
- License
- 95033971 (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
- 2024-08-14
- Last updated
- 2025-06-10
- Certified
- 2025-06-10
Frequently asked questions
- What is Margarita Lewis-Upton's NPI number?
- Margarita Lewis-Upton's National Provider Identifier (NPI) is 1881426476, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margarita Lewis-Upton's specialty?
- Margarita Lewis-Upton is listed in the NPPES registry with a primary specialty of Gerontology Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Margarita Lewis-Upton located?
- Margarita Lewis-Upton's practice location on file with NPPES is 16854 Ivy Ave Ste a, Fontana, CA 92335-1504.
- What is Margarita Lewis-Upton's phone number?
- The practice phone number listed in the NPPES registry for Margarita Lewis-Upton is (909) 791-1000.
- Does Margarita Lewis-Upton accept Medicare?
- Margarita Lewis-Upton is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margarita Lewis-Upton's NPI active?
- Yes — Margarita Lewis-Upton's NPI (1881426476) is active in the NPPES registry as of the last update on 2025-06-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.