Dr. Jonathan D. Weaver, MD
Internal Medicine (Internal Medicine Physician)
2121 Wilshire Blvd, #103
Santa Monica, CA 90403
Who else practices at this address →
Los Angeles County includes primary care (7% of residents) and mental health (13% of residents) shortage areas. About shortage areas
- Medicare participating
At a glance
- Medical school
- University of California, Geffen School of Medicine (2001)
- Years since graduation
- 25
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 449
Licensed in California since 2002, according to the Medical Board of California. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 2001Medical school: University of California, Geffen School of Medicine
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Internal Medicine Physician primary
CA license A81411 (first issued 2002; current)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Ronald Reagan UCLA Medical Center Los Angeles, CA
- Eisenhower Medical Center Rancho Mirage, CA
- Saint John's Health Center Santa Monica, CA
Medical groups
- Westside Internal Medicine (8 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 449
- Services billed
- 6,757
- Patients’ average age
- 81
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 30-39 minutes | 705 | 312 |
| Insertion of needle into vein for collection of blood sample | 577 | 368 |
| Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | 389 | 320 |
| Blood test, basic group of blood chemicals (calcium, total) | 386 | 318 |
| Liver function blood test panel | 379 | 317 |
| Manual urinalysis test with examination using microscope, non-automated | 371 | 297 |
| Hemoglobin a1c level | 332 | 308 |
| Ferritin (blood protein) level | 327 | 307 |
| Thyroid hormone, t3 measurement, free | 326 | 306 |
| Blood test, thyroid stimulating hormone (tsh) | 325 | 306 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 15 companies reported 42 payments worth $919 in total to this clinician.
| AstraZeneca Pharmaceuticals LP | $186 |
|---|---|
| Lilly USA, LLC | $123 |
| Bausch Health US, LLC | $93.96 |
| Sumitomo Pharma America, Inc. | $84.97 |
| AbbVie Inc. | $83.80 |
| Novo Nordisk Inc | $56.72 |
| Ibsa Pharma Inc. | $52.86 |
| Amgen Inc. | $44.05 |
| Food and Beverage | $919 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.