Siavosh Vakilian, MD

Medicare activity in 2024

Official CMS public-use data for Siavosh Vakilian, 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. Calculation of radiation therapy dose (77300)418 services
2. Ct guidance for insertion of radiation therapy fields (77014)390 services
3. Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session (G6015)390 services
4. Design and construction of complex radiation treatment device (77334)241 services
5. Obtaining data needed to develop the optimal radiation treatment, 1 treatment area (77280)133 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%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
• Arthritis40%
• Diabetes34%
• Ischemic heart disease26%

Hospitals where Siavosh Vakilian works

Medicare's Facility Affiliation Data lists Siavosh Vakilian 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.

• Sharp Coronado Hospital and Healthcare CenterCoronado, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050234

Practice locations

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

• 3366 5th AveSan Diego, CA 92103 (619) 230‑0400
• 5395 Ruffin Rd, Suite 103San Diego, CA 92123 (858) 505‑4100

Group practices

Medicare enrollment lists Siavosh Vakilian as a member of this group (CMS data updated October 2, 2026).

• Genesis Healthcare Partners PC228 clinicians in the group

Specialties

• Radiation Oncologyprimary

Find other Radiation Oncology doctors in California →

Other radiation oncologists in San Diego

Clinicians with the same Medicare primary specialty in San Diego, CA — not a recommendation.

• Carl J. Rossi Jr., MD
• Andrew L. Chang, MD
• Chika R. Nwachukwu, MD
• Reza Shirazi, MD
• Jona A. Hattangadi-Gluth, MD
• Donald B. Fuller, MD
• Tahir Ijaz, MD
• Michael V. Sherer, MD

All radiation oncologists in San Diego →

Other clinicians in Genesis Healthcare Partners PC

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Erica Bui, PA
• Lloyd A. Ligayo, DC
• Stefan Chin, MD
• Robert Q. Hoang, MD
• Robert H. Goldklang, MD
• Lawrence Flechner, MD

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