Dr. William Aronson, MD
Urology (Urology Physician)
10833 Le Conte Ave.
Los Angeles, CA 90095
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
At a glance
- In the NPI registry since
- 2006
Licensed in California since 1988, 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
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Medicare’s Care Compare data doesn’t list this clinician’s medical school. 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
-
Urology Physician primary
CA license G64582 (first issued 1988; current)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Payments from drug and device companies
In 2025, 12 companies reported 81 payments worth $81,437 in total to this clinician.
| Janssen Biotech, Inc. | $25,745 |
|---|---|
| Bayer HealthCare Pharmaceuticals Inc. | $22,892 |
| Astellas Pharma US Inc | $21,023 |
| Pfizer Inc. | $6,496 |
| Ferring Pharmaceuticals Inc. | $2,790 |
| Astellas Pharma Global Development | $2,100 |
| Dendreon Pharmaceuticals LLC | $259 |
| AstraZeneca Pharmaceuticals LP | $35.06 |
| Compensation for services other than consulting (speaking, faculty) | $61,223 |
|---|---|
| Travel and Lodging | $12,287 |
| Consulting Fee | $6,372 |
| Food and Beverage | $1,351 |
| Education | $203 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Astellas Pharma US Inc Mar 29, 2025 | Compensation for services other than consulting (speaking, faculty) Xtandi · Oncology | $6,020 |
| Astellas Pharma US Inc Dec 5, 2025 | Compensation for services other than consulting (speaking, faculty) Xtandi · Oncology | $6,020 |
| Astellas Pharma US Inc Nov 19, 2025 | Compensation for services other than consulting (speaking, faculty) Xtandi · Oncology | $5,160 |
| Bayer HealthCare Pharmaceuticals Inc. May 16, 2025 | Compensation for services other than consulting (speaking, faculty) Nubeqa · Oncology | $4,778 |
| Bayer HealthCare Pharmaceuticals Inc. Aug 21, 2025 | Compensation for services other than consulting (speaking, faculty) Nubeqa · Oncology | $4,778 |
| Bayer HealthCare Pharmaceuticals Inc. Jul 7, 2025 | Compensation for services other than consulting (speaking, faculty) Nubeqa · Oncology | $4,410 |
| Pfizer Inc. Apr 10, 2025 | Compensation for services other than consulting (speaking, faculty) XTANDI · ONCOLOGY | $4,275 |
| Janssen Biotech, Inc. Mar 31, 2025 | Compensation for services other than consulting (speaking, faculty) RYBREVANT; CARVYKTI · Oncology | $4,163 |
| Janssen Biotech, Inc. Apr 1, 2025 | Compensation for services other than consulting (speaking, faculty) RYBREVANT; CARVYKTI · Oncology | $4,163 |
| Janssen Biotech, Inc. Sep 15, 2025 | Compensation for services other than consulting (speaking, faculty) RYBREVANT; CARVYKTI · Oncology | $4,163 |
All 51 payments other than meals, newest first
| Company | What it was for | Amount |
|---|---|---|
| Bayer HealthCare Pharmaceuticals Inc. Dec 23, 2025 | Compensation for services other than consulting (speaking, faculty) Nubeqa · Oncology | $3,308 |
| Astellas Pharma Global Development Dec 12, 2025 | Consulting Fee Xtandi · Oncology | $2,100 |
| Astellas Pharma US Inc Dec 5, 2025 | Compensation for services other than consulting (speaking, faculty) Xtandi · Oncology | $6,020 |
| Astellas Pharma US Inc Dec 5, 2025 | Travel and Lodging Xtandi · Oncology · travel to Denver, CO | $849 |
| Astellas Pharma US Inc Dec 5, 2025 | Travel and Lodging Xtandi · Oncology · travel to Denver, CO | $483 |
| Astellas Pharma US Inc Dec 5, 2025 | Travel and Lodging Xtandi · Oncology · travel to Denver, CO | $119 |
| Ferring Pharmaceuticals Inc. Nov 20, 2025 | Consulting Fee ADSTILADRIN · ONCOLOGY | $2,532 |
| Astellas Pharma US Inc Nov 19, 2025 | Compensation for services other than consulting (speaking, faculty) Xtandi · Oncology | $5,160 |
| Astellas Pharma US Inc Nov 19, 2025 | Travel and Lodging Xtandi · Oncology · travel to Santa Barbara, CA | $1,014 |
| AstraZeneca Pharmaceuticals LP Nov 19, 2025 | Education IMFINZI · Oncology · in-kind Company’s descriptionJournal Article | $35.06 |
| Bayer HealthCare Pharmaceuticals Inc. Sep 30, 2025 | Travel and Lodging Nubeqa · Oncology · travel to Rancho Palos Verdes, CA · in-kind | $583 |
| Astellas Pharma US Inc Sep 19, 2025 | Education in-kind | $68.00 |
| Janssen Biotech, Inc. Sep 16, 2025 | Travel and Lodging RYBREVANT; CARVYKTI · Oncology · travel to San Luis Obispo, CA | $46.06 |
| Janssen Biotech, Inc. Sep 15, 2025 | Compensation for services other than consulting (speaking, faculty) RYBREVANT; CARVYKTI · Oncology | $4,163 |
| Janssen Biotech, Inc. Sep 12, 2025 | Travel and Lodging RYBREVANT; CARVYKTI · Oncology · travel to San Luis Obispo, CA · in-kind | $939 |
| Bayer HealthCare Pharmaceuticals Inc. Aug 21, 2025 | Compensation for services other than consulting (speaking, faculty) Nubeqa · Oncology | $4,778 |
| Janssen Biotech, Inc. Aug 12, 2025 | Travel and Lodging RYBREVANT; CARVYKTI · Oncology · travel to San Luis Obispo, CA · in-kind | $5.50 |
| Bayer HealthCare Pharmaceuticals Inc. Aug 2, 2025 | Travel and Lodging Nubeqa · Oncology · travel to Pismo Beach, CA · in-kind | $1,603 |
| Bayer HealthCare Pharmaceuticals Inc. Jul 7, 2025 | Compensation for services other than consulting (speaking, faculty) Nubeqa · Oncology | $4,410 |
| Bayer HealthCare Pharmaceuticals Inc. Jun 27, 2025 | Compensation for services other than consulting (speaking, faculty) Nubeqa · Oncology | $1,470 |
| Bayer HealthCare Pharmaceuticals Inc. Jun 27, 2025 | Travel and Lodging Nubeqa · Oncology · travel to San Die, CA · in-kind | $1,200 |
| Janssen Biotech, Inc. Jun 13, 2025 | Education ERLEADA · Oncology · in-kind | $99.99 |
| Janssen Biotech, Inc. May 21, 2025 | Compensation for services other than consulting (speaking, faculty) RYBREVANT; CARVYKTI · Oncology | $416 |
| Pfizer Inc. May 20, 2025 | Consulting Fee TALZENNA · ONCOLOGY | $1,740 |
| Bayer HealthCare Pharmaceuticals Inc. May 16, 2025 | Compensation for services other than consulting (speaking, faculty) Nubeqa · Oncology | $4,778 |
| Pfizer Inc. Apr 12, 2025 | Travel and Lodging XTANDI · ONCOLOGY · travel to Los Angeles, CA · in-kind | $481 |
| Pfizer Inc. Apr 10, 2025 | Compensation for services other than consulting (speaking, faculty) XTANDI · ONCOLOGY | $4,275 |
| Bayer HealthCare Pharmaceuticals Inc. Apr 5, 2025 | Travel and Lodging Nubeqa · Oncology · travel to Las Vegas, NV · in-kind | $103 |
| Janssen Biotech, Inc. Apr 2, 2025 | Travel and Lodging RYBREVANT; CARVYKTI · Oncology · travel to Meridian, ID | $106 |
| Janssen Biotech, Inc. Apr 1, 2025 | Compensation for services other than consulting (speaking, faculty) RYBREVANT; CARVYKTI · Oncology | $4,163 |
| Janssen Biotech, Inc. Mar 31, 2025 | Compensation for services other than consulting (speaking, faculty) RYBREVANT; CARVYKTI · Oncology | $4,163 |
| Astellas Pharma US Inc Mar 29, 2025 | Compensation for services other than consulting (speaking, faculty) Xtandi · Oncology | $6,020 |
| Astellas Pharma US Inc Mar 29, 2025 | Travel and Lodging Xtandi · Oncology · travel to Denver, CO | $800 |
| Astellas Pharma US Inc Mar 29, 2025 | Travel and Lodging Xtandi · Oncology · travel to Denver, CO | $309 |
| Janssen Biotech, Inc. Mar 27, 2025 | Travel and Lodging RYBREVANT; CARVYKTI · Oncology · travel to Pismo Beach, CA · in-kind | $1,167 |
| Janssen Biotech, Inc. Mar 24, 2025 | Compensation for services other than consulting (speaking, faculty) RYBREVANT; CARVYKTI · Oncology | $3,608 |
| Janssen Biotech, Inc. Mar 24, 2025 | Travel and Lodging RYBREVANT; CARVYKTI · Oncology · travel to Torrance, CA · in-kind | $561 |
| Janssen Biotech, Inc. Mar 21, 2025 | Travel and Lodging RYBREVANT; CARVYKTI · Oncology · travel to Meridian, ID · in-kind | $488 |
| Janssen Biotech, Inc. Mar 20, 2025 | Travel and Lodging RYBREVANT; CARVYKTI · Oncology · travel to Pismo Beach, CA · in-kind | $5.50 |
| Janssen Biotech, Inc. Mar 17, 2025 | Travel and Lodging RYBREVANT; CARVYKTI · Oncology · travel to Torrance, CA · in-kind | $5.50 |
| Bayer HealthCare Pharmaceuticals Inc. Mar 15, 2025 | Compensation for services other than consulting (speaking, faculty) Nubeqa · Oncology | $368 |
| Janssen Biotech, Inc. Mar 11, 2025 | Travel and Lodging RYBREVANT; CARVYKTI · Oncology · travel to Pismo Beach, CA · in-kind | $5.50 |
| Janssen Biotech, Inc. Mar 10, 2025 | Travel and Lodging RYBREVANT; CARVYKTI · Oncology · travel to Meridian, ID · in-kind | $39.99 |
| Janssen Biotech, Inc. Mar 10, 2025 | Travel and Lodging RYBREVANT; CARVYKTI · Oncology · travel to Pismo Beach, CA · in-kind | $5.50 |
| Janssen Biotech, Inc. Mar 5, 2025 | Travel and Lodging RYBREVANT; CARVYKTI · Oncology · travel to Meridian, ID · in-kind | $555 |
| Janssen Biotech, Inc. Feb 3, 2025 | Travel and Lodging RYBREVANT; CARVYKTI · Oncology · travel to Memphis, TN | $319 |
| Janssen Biotech, Inc. Feb 3, 2025 | Travel and Lodging RYBREVANT; CARVYKTI · Oncology · travel to Memphis, TN | $120 |
| Janssen Biotech, Inc. Feb 3, 2025 | Travel and Lodging RYBREVANT; CARVYKTI · Oncology · travel to Memphis, TN | $23.38 |
| Janssen Biotech, Inc. Jan 27, 2025 | Compensation for services other than consulting (speaking, faculty) RYBREVANT; CARVYKTI · Oncology | $4,125 |
| Janssen Biotech, Inc. Jan 21, 2025 | Travel and Lodging RYBREVANT; CARVYKTI · Oncology · travel to Memphis, TN · in-kind | $166 |
| Janssen Biotech, Inc. Jan 17, 2025 | Travel and Lodging RYBREVANT; CARVYKTI · Oncology · travel to Memphis, TN · in-kind | $187 |
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.
Industry-funded research
Named as a principal investigator on 2 industry-funded studies in 2025, from 2 companies. The companies reported $44,700 in research payments for these studies, mostly to the institutions running them.
- Prostrate specific membrane antigen (psma) scan and multiparametric mri for prostraste biopsy detection of clinically significant prostrate cancer
Progenics Pharmaceuticals, Inc. - Metastatic Castrate-Resistant Prostate Cancer Subjects Treated With PROVENGE® + One Infusion of Sipuleucel-T
Dendreon Pharmaceuticals LLC · Recruiting · NCT06134232
From CMS Open Payments research payments, where companies name up to five principal investigators per payment. Research payments usually go to hospitals, universities and research sites, not to the investigator personally. A payment is not evidence of wrongdoing.