Dr. Toby Levenson, MD
Allergy & Immunology (Allergy & Immunology Physician)
4050 Moorpark Avenue
San Jose, CA 95117
Who else practices at this address →
Santa Clara County includes mental health (13% of residents) shortage areas. About shortage areas
- Medicare participating
At a glance
- Medical school
- Northwestern University Feinberg Medical School (1990)
- Years since graduation
- 36
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 142
Licensed in California since 1992, 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
- 1990Medical school: Northwestern University Feinberg Medical School
- 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
-
Allergy & Immunology Physician primary
CA license G74286 (first issued 1992; current)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Washington Hospital Fremont, CA
Medical groups
- UCSF Health Medical Foundation (40 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
- 142
- Services billed
- 3,270
- Patients’ average age
- 75
| Service | Times | Patients |
|---|---|---|
| Test for allergy using allergenic extract | 1,253 | 21 |
| Professional service for preparation and provision of 1 or more antigens | 521 | 39 |
| Professional service for multiple injections of allergen | 388 | 31 |
| Test to measure expiratory airflow and volume | 232 | 90 |
| Test to measure the level of nitric oxide gas | 191 | 83 |
| Established patient office or other outpatient visit, 20-29 minutes | 152 | 78 |
| Test for allergy using allergenic extract injected into skin | 135 | 20 |
| Established patient office or other outpatient visit, 30-39 minutes | 130 | 76 |
| New patient office or other outpatient visit, 45-59 minutes | 25 | 25 |
| Established patient office or other outpatient visit, 10-19 minutes | 24 | 21 |
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
| Drug | Prescriptions |
|---|---|
| Montelukast Sodium Other prescribers in San Jose, CA | 140 |
| Prednisone Other prescribers in San Jose, CA | 88 |
| Albuterol Sulfate Hfa (albuterol sulfate) Other prescribers in San Jose, CA | 60 |
| Trelegy Ellipta (fluticasone/umeclidin/vilanter) Other prescribers in San Jose, CA | 44 |
| Breo Ellipta (fluticasone/vilanterol) Other prescribers in San Jose, CA | 27 |
| Arnuity Ellipta (fluticasone furoate) Other prescribers in San Jose, CA | 26 |
| Dupixent Pen (dupilumab) Other prescribers in San Jose, CA | 25 |
| Azelastine Hcl Other prescribers in San Jose, CA | 24 |
| Amoxicillin-Clavulanate Potass (amoxicillin/potassium clav) Other prescribers in San Jose, CA | 22 |
| Cefuroxime (cefuroxime axetil) Other prescribers in San Jose, CA | 19 |
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, 10 companies reported 59 payments worth $1,331 in total to this clinician.
| AstraZeneca Pharmaceuticals LP | $361 |
|---|---|
| GlaxoSmithKline, LLC. | $319 |
| Genzyme Corporation | $275 |
| Amgen Inc. | $87.23 |
| Novartis Pharmaceuticals Corporation | $80.02 |
| Viatris Specialty LLC | $73.82 |
| Genentech USA, Inc. | $43.10 |
| Octapharma USA, Inc. | $41.09 |
| Food and Beverage | $1,323 |
|---|---|
| Education | $8.25 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Genzyme Corporation Apr 14, 2025 | Education DUPIXENT · Immunology · in-kind Company’s descriptionIf more than one clinical reprint is received on the same day, the reported transfer of value will reflect the aggregate total. | $8.25 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
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.