Marjorie Wimmer, MD
Marjorie Wimmer, MD is an Internal Medicine Physician in Riverside, CA, registered under NPI 1003494147.
Getting there
Here is what surrounds this office in Riverside, based on OpenStreetMap data collected Sep 30, 2026. Parking is available about 0.45 mi away. There is EV charging 0.43 mi from the office (Riverside - Canyon Springs Parkway Supercharger) — useful if you are driving in from out of town. If you arrive early, there is a coffee shop 0.44 mi away.
Getting here and what is nearby
Restaurant Portillo's 559 ft ~3 min
12840 Day Street, Moreno Valley 92553
Su-Th 10:00-22:30; Fr-Sa 10:00-23:00
Hotel Residence Inn Riverside Moreno Valley 908 ft ~4 min
Gas station 76 924 ft ~4 min
Convenience Beyond Food Mart 1,011 ft ~4 min
Gas station Costco Gasoline 0.20 mi ~4 min
Hotel Holiday Inn Express & Suites Moreno Valley - Riverside 0.21 mi ~5 min
12960 Day Street, Moreno Valley 92553
Restaurant Country Kitchen - Moreno Valley 0.21 mi ~5 min
12980 Day Street
Mo-Th,Su 07:00-20:00; Fr-Sa 07:00-22:00
Hotel Fairfield Inn & Suites Riverside Moreno Valley 0.25 mi ~6 min
Coffee The Cupcake and espresso Bar 0.26 mi ~6 min
Gas station Arco 0.27 mi ~6 min
Grocery ALDI 0.28 mi ~6 min
12630 Day Street, Moreno Valley 92553-7572
Mo, We, Fr-Su 09:00-21:00; Tu, Th 08:30-21:00
Convenience ampm 0.29 mi ~6 min
Grocery WinCo Foods 0.29 mi ~6 min
Restaurant Starbucks 0.33 mi ~7 min
Coffee Starbucks 0.42 mi ~9 min
EV charging Riverside - Canyon Springs Parkway Supercharger 0.43 mi ~9 min
Coffee Nubi Yogurt 0.44 mi ~9 min
Parking 0.45 mi ~9 min
Parking 0.45 mi ~10 min
Grocery Walmart Supercenter 0.47 mi ~10 min
6250 Valley Springs Parkway, Riverside 92507
Mo-Su 06:00-24:00
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| A191760 | CA | Internal Medicine Physician primary |
This provider holds licence A191760 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Family Practice
- PAC ID
- 3577002245
- Enrollment ID
- I20240826002600
Medicare enrolment is recorded as approved under the provider type Practitioner - Family Practice. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Internal Medicine covers
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs. NUCC Health Care Provider Taxonomy, code 207R00000X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003494147 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 30, 2021 |
| Last updated | Apr 11, 2025 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | MD |
| Practice address |
6405 DAY ST Riverside, CA 92507 (951) 697-5414 Fax (951) 697-5492 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 4 | 9 | 4 | 1 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 9 | 8 | 1 | 8 |
Sum = 63 · next multiple of 10 = 70 · check digit = 7 · actual last digit = 7
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.