Dr. Arnold S. Baas, MD
Cardiology (Cardiovascular Disease Physician)
100 Ucla Medical Plz Ste 630
Los Angeles, CA 90024
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 Texas Southwestern Medical School at Dallas (1989)
- Years since graduation
- 37
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 975
Licensed in California since 2005, 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
- 1989Medical school: University of Texas Southwestern Medical School at Dallas
- 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
-
Cardiovascular Disease Physician primary
CA license C51919 (first issued 2005; current) -
Internal Medicine Physician
CA license C51919 (first issued 2005; current) -
Orthopaedic Surgery Physician
CA license C51919 (first issued 2005; 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
- Santa Monica - UCLA Med Ctr & Orthopaedic Hospital Santa Monica, CA
- French Hospital Medical Center San Luis Obispo, CA
- UCLA West Valley Medical Center West Hills, CA
Medical groups
- The Regents of the University of California (1,462 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
- 975
- Services billed
- 4,339
- Patients’ average age
- 73
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 40-54 minutes | 777 | 384 |
| Ultrasound of heart, follow-up | 558 | 260 |
| Ultrasound of heart blood flow, valves and chambers, follow-up | 557 | 259 |
| Ultrasound of heart with color-depicted blood flow, rate and valve function | 495 | 264 |
| Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | 411 | 389 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 328 | 79 |
| Critical care, first 30-74 minutes | 246 | 49 |
| Injection, regadenoson, 0.1 mg | 180 | 44 |
| Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision and review by physician | 48 | 47 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 38 | 38 |
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, 1 companies reported 1 payments worth $142 in total to this clinician.
| Endotronix, Inc. | $142 |
|---|
| Food and Beverage | $142 |
|---|
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.