Siamak Barkhordarian, MD

Medicare activity in 2024

Official CMS public-use data for Siamak Barkhordarian, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)354 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)289 services
3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)168 services
4. Ultrasonic guidance for blood vessel access (76937)127 services
5. Review by radiologist of arm or leg artery image (75710)126 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High blood pressure75%
• High cholesterol75%
• Diabetes75%
• Chronic kidney disease75%
• Arthritis74%
• Ischemic heart disease71%

Hospitals where Siamak Barkhordarian works

Medicare's Facility Affiliation Data lists Siamak Barkhordarian at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• Cedars-Sinai Medical CenterLos Angeles, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050625
• Hollywood Presbyterian Medical CenterLos Angeles, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050063
• Southern California Hospital at HollywoodHollywood, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050135

Practice locations

Addresses where Siamak Barkhordarian is enrolled with Medicare (CMS data updated October 2, 2026).

• 8631 W 3rd StLos Angeles, CA 90048 (310) 880‑3933

Specialties

• Vascular Surgeryprimary
• Diagnostic Radiologyalso
• General Surgeryalso
• Interventional Radiologyalso
• Peripheral Vascular Diseasealso

Find other Vascular Surgery doctors in California →

Other vascular surgeons in Los Angeles

Clinicians with the same Medicare primary specialty in Los Angeles, CA — not a recommendation.

• Ariela Rumeld, MD
• Sukgu Han, MD
• Max E. Liebl, MD
• Steven M. Farley, MD
• Jateen Prema, MD
• Sam S. Ahn, MD
• Shih Yau G. Huang, MD
• Joseph Abu Dalu, MD

All vascular surgeons in Los Angeles →

Clinician information

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians