Siavosh Vakilian, MD
NPI 1427456151 · Radiation Oncology Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Radiation Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Siavosh Vakilian, MD is a Radiation Oncology Physician provider in San Diego, CA (NPI 1427456151).
Provider details
- NPI number
- 1427456151
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A133482 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
11 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
2,434 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Calculation of Radiation Therapy Dose77300 | 418 | $73 |
| Ct Guidance for Insertion of Radiation Therapy Fields77014 | 390 | $134 |
| Intensity Modulated Treatment Delivery, Single Or Multiple Fields/Arcs,via Narrow Spatially and Temporally Modulated Beams, Binary, Dynamic Mlc, Per Treatment SessionG6015 | 390 | $414 |
| Design and Construction of Complex Radiation Treatment Device77334 | 241 | $134 |
| Obtaining Data Needed to Develop the Optimal Radiation Treatment, 1 Treatment Area77280 | 133 | $310 |
| Image-Guided Robotic Linear Accelerator-Based Stereotactic Radiosurgery, Delivery Including Collimator Changes and Custom Plugging, Fractionated Treatment, All Lesions, Per Session, Second Through Fifth Sessions, Maximum Five Sessions Per Course of Treatme |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamsulosin Hcl | 394 | 89 |
| Methylprednisolone | 74 | 51 |
| Oxybutynin Chloride | 35 | — |
| Vibegronbrand: Gemtesa | 33 | — |
| Ciprofloxacin Hcl | 29 | 29 |
| Ondansetron Hcl | 29 | 16 |
| Naproxen | 27 | 27 |
| Silver Sulfadiazinebrand: Ssd |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$245 across 6 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (3)
- 1410 S La Brucherie RdEl Centro, CA 92243-9676Phone: (760) 339-5620Fax: (760) 339-5621
- 701 E Grand Ave Ste 200Escondido, CA 92025-4466Phone: (760) 839-7370Fax: (858) 429-7938
- 5395 Ruffin Rd Ste 103San Diego, CA 92123-1338Phone: (858) 505-4100Fax: (858) 429-7939
Registry dates
- Enumerated
- 2014-12-11
- Last updated
- 2021-06-01
- Certified
- 2021-06-01
Frequently asked questions
- What is Siavosh Vakilian's NPI number?
- Siavosh Vakilian's National Provider Identifier (NPI) is 1427456151, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Siavosh Vakilian's specialty?
- Siavosh Vakilian is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Siavosh Vakilian located?
- Siavosh Vakilian's practice location on file with NPPES is 3366 5th Ave, San Diego, CA 92103-5713.
- What is Siavosh Vakilian's phone number?
- The practice phone number listed in the NPPES registry for Siavosh Vakilian is (619) 230-0400.
- Does Siavosh Vakilian accept Medicare?
- Siavosh Vakilian is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Siavosh Vakilian's NPI active?
- Yes — Siavosh Vakilian's NPI (1427456151) is active in the NPPES registry as of the last update on 2021-06-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.