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MRS. MARGARITA LUCAS LEWIS-UPTON
NPI 1881426476
Nurse Practitioner - Gerontology in Fontana, CA

Active since August 14, 2024PECOS Enrolled
16854 IVY AVE STE A, FONTANA, CA 92335(909) 791-1000(909) 781-6000 Get Directions Write a Review

NPPES record last updated: June 10, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jun 10, 2025, Feb 26, 2025, Nov 7, 2024 and 1 more (4 updates tracked since 2024).

About Mrs. Margarita Lucas Lewis-upton NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MRS. MARGARITA LUCAS LEWIS-UPTON (NPI 1881426476) is an individual gerontology provider in Fontana, California, licensed in California (95033971) and active in the NPI registry since August 2024. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1881426476
Entity TypeIndividualFemale
Primary Taxonomy363LG0600X
Provider Legal NameMRS. MARGARITA LUCAS LEWIS-UPTON
Location Address16854 IVY AVE STE AFontana, CA 92335-1504
Mailing Address5853 Ventana DrFontana, CA 92336-5615 · (909) 641-0717
Phone(909) 791-1000
Fax(909) 781-6000
Sole ProprietorYes
Enumeration DateAugust 14, 2024
Last NPPES UpdateJune 10, 20254 updates tracked since enumeration
NPPES CertifiedJune 10, 2025
✔ NPI 1881426476 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · GerontologyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LG0600X
License✔ Licensed in CA · 95033971
Also ListedRegistered NurseTaxonomy 163W00000X · License 774371 (CA)
16854 IVY AVE STE A, Fontana, CA 92335
Open in Google Maps ↗

Other Names 1

Former Name (1)Margarita Lucas Lewis Rn

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mrs. Margarita Lucas Lewis-upton is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Margarita Lewis-upton reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Namita Mohideen MD Inc
2.3 mi
Primary Care
16465 SIERRA LAKES PKWY STE 115
Fontana, CA 92336
  • Reassigned Medicare billing, California enrollment
  • 22 clinicians in this Medicare group
NPI 1649546144 (909) 823-8000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92335 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$91.88 typical visit price
range $59.60 – $179.42
Typical copayment $22.97 (range $14.90 – $44.85)
Most-billed visit code 99203
Established Patient
$104.64 typical visit price
range $19.37 – $146.42
Typical copayment $26.16 (range $4.84 – $36.60)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 4

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MIGUEL ANGEL MARTINEZ MD
Family Medicine
16854 IVY AVE STE A
FONTANA, CA 92335
San Bernardino County (909) 791-1000
PATRICIA DIANA JUAREZ
Community Health Worker
16854 IVY AVE STE A
FONTANA, CA 92335
San Bernardino County (909) 791-1000
CINTHYA FLORES SIGALA CHW
Community Health Worker
16854 IVY AVE STE A
FONTANA, CA 92335
San Bernardino County (909) 791-1000
MS. MICHELLE PINON
Marriage & Family Therapist
16854 IVY AVE STE A
FONTANA, CA 92335
San Bernardino County (909) 791-1000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Margarita Lewis-upton's NPI number?

The NPI number for Margarita Lewis-upton is 1881426476. It was assigned to this individual provider in the NPPES registry on August 14, 2024. The provider is also known as Margarita Lucas Lewis Rn.

Where is Margarita Lewis-upton located?

Margarita Lewis-upton practices at 16854 Ivy Ave Ste A, Fontana, CA 92335. The listed phone number is (909) 791-1000.

What is Margarita Lewis-upton's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Gerontology, with taxonomy code 363LG0600X.

Is Margarita Lewis-upton enrolled in Medicare?

Yes. Margarita Lewis-upton is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Margarita Lewis-upton's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Margarita Lewis-upton reassigns Medicare benefits to Namita Mohideen MD Inc (Fontana, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Margarita Lewis-upton's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Margarita Lewis-upton was last updated on June 10, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.