Michael T. Duffy, M.D.
Specialist
9400 Brighton Way, Suite 201
Beverly Hills, CA 90210
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 Minnesota Medical School (1985)
- Years since graduation
- 41
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 225
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
- 1985Medical school: University of Minnesota 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
-
Specialist primary
CA license G59599
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Cedars-Sinai Medical Center Los Angeles, CA
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
- 225
- Services billed
- 1,757
- Patients’ average age
- 78
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 30-39 minutes | 245 | 115 |
| Established patient office or other outpatient visit, 40-54 minutes | 176 | 148 |
| Established patient office or other outpatient visit, 20-29 minutes | 157 | 87 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 145 | 121 |
| Blood test, comprehensive group of blood chemicals | 132 | 114 |
| Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | 129 | 111 |
| Blood test, lipids (cholesterol and triglycerides) | 121 | 109 |
| Uric acid level, blood | 116 | 107 |
| Glutamyltransferase (liver enzyme) level | 116 | 107 |
| Blood test, thyroid stimulating hormone (tsh) | 109 | 101 |
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, 18 companies reported 49 payments worth $1,283 in total to this clinician.
| Amgen Inc. | $343 |
|---|---|
| AbbVie Inc. | $327 |
| Lilly USA, LLC | $67.86 |
| GlaxoSmithKline, LLC. | $66.60 |
| Merck Sharp & Dohme LLC | $66.30 |
| Novo Nordisk Inc | $47.53 |
| Lundbeck LLC | $45.99 |
| Sumitomo Pharma America, Inc. | $42.14 |
| Food and Beverage | $1,283 |
|---|
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.