Quick answers
- Does Siavosh Vossough accept Medicare assignment?
- Yes. Medicare's clinician data says Siavosh Vossough accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Siavosh Vossough see?
- In 2024, CMS data shows 414 Original Medicare patients and 3,266 services for Siavosh Vossough. This counts Original Medicare only and measures volume, not quality.
- What is Siavosh Vossough's NPI number?
- 1922192111. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Siavosh Vossough, 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.
| Original Medicare patients | 414 |
|---|---|
| Services billed to Medicare | 3,266 |
| Different services or procedures | 38 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Destruction of precancer skin growth, 2-14 growths (17003)1,764 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)575 services
- Destruction of precancer skin growth, 1 growth (17000)384 services
- Destruction of skin growth, 1-14 growths (17110)133 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)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 cholesterol75%
- High blood pressure59%
- Arthritis36%
- Ischemic heart disease24%
- Osteoporosis23%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)17%
Practice locations
Addresses where Siavosh Vossough is enrolled with Medicare (CMS data updated October 2, 2026).
- 86 3rd St, Unit 114Los Altos, CA 94022 (650) 949‑2771
Specialties
- Dermatologyprimary
- Internal Medicinealso
Other dermatologists in Los Altos
Clinicians with the same Medicare primary specialty in Los Altos, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Albany Medical College Of Union University |
| Graduation year | 1995 (31 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1922192111 |
| Corrections | Report an error or suggest an update → |
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
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians