Doctor profile · Federal record

Dr. Marjorie Wimmer, MD

Internal Medicine Physician (CMS: Family Practice) · Riverside, CA

  • NPI 1003494147
  • Accepts Medicare
  • 5 yrs in practice
  • Female
  • Group practice
  • No sanctions

Practice & contact

Operates at 2 locations .

NPPES Updated May 11, 2026
Primary practice
6405 Day St
Riverside, CA 925070901
(951) 697-5414
fax (951) 697-5492
Additional location
14400 Olive View Dr
Sylmar, CA 913421436
(818) 364-3313

Credentials & registration

NPPES · NUCC
NPI registered
March 2021 — 5 yrs on file
Profile last updated
April 11, 2025
Year of graduation
2021 — 5 yrs since
Specialty taxonomy
207R00000X — NUCC code
State license (1)
California #A191760

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1003494147. Last verified May 11, 2026.

Open Payments

Industry payments received

CMS Open Payments
All-time total
$40
Transactions
2
Manufacturers
1
Payer (manufacturer) Industry Txns Amount
Novo Nordisk INC 2 $39.61

By nature of payment

Food and Beverage
$40

Medicare Part D · 2023

Top prescriptions

CMS Part D Prescriber
Total claims
73
Patients
0
Total drug cost
$1,210
Drug Type Claims Patients Total cost
Atorvastatin Calcium Generic 18 0 $357
Losartan Potassium Generic 18 0 $342
Alendronate Sodium Generic 14 0 $213
Metformin Hcl Generic 12 0 $159
Amlodipine Besylate Generic 11 0 $140

Frequently asked questions

Auto-generated from federal data
What is Dr. Marjorie Wimmer's medical specialty?
Dr. Marjorie Wimmer practices Internal Medicine Physician in Riverside, CA.
Where does Dr. Marjorie Wimmer practice?
Dr. Marjorie Wimmer practices at 6405 Day St, Riverside, CA 925070901. Office phone: 9516975414.
What is Dr. Marjorie Wimmer's NPI?
Dr. Marjorie Wimmer's National Provider Identifier (NPI) is 1003494147, issued by NPPES.
Does Dr. Marjorie Wimmer accept Medicare assignment?
Yes. Dr. Marjorie Wimmer accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.

Methodology · sources used on this page

All figures on this page come from publicly available federal datasets. We do not edit, score, or summarise the underlying data. Profile generated Jul 6, 2026.

NPPES Provider identifiers and practice info May 11, 2026
Open Payments Industry payments to providers (Sunshine Act) May 11, 2026
Medicare Procedure Utilization Services and allowed amounts by HCPCS May 11, 2026
Medicare Part D Prescription drug claims May 11, 2026
CMS MIPS Quality performance scores May 11, 2026
OIG LEIE Federal exclusion / sanctions list May 11, 2026

Information based on publicly available federal data. Not medical advice. Report incorrect data ›