Quick answers
- Does Sean D. Hilchey accept Medicare assignment?
- Yes. Medicare's clinician data says Sean D. Hilchey 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 Sean D. Hilchey see?
- In 2024, CMS data shows 475 Original Medicare patients and 6,572 services for Sean D. Hilchey. This counts Original Medicare only and measures volume, not quality.
- What is Sean D. Hilchey's NPI number?
- 1306858204. 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 Sean D. Hilchey, 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 | 475 |
|---|---|
| Services billed to Medicare | 6,572 |
| Different services or procedures | 59 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)3,800 services
- Injection, gadobutrol, 0.1 ml (A9585)2,246 services
- Mri scan of leg joint without contrast (73721)98 services
- Mri scan of lower spinal canal without contrast (72148)79 services
- Mri scan of arm joint without contrast (73221)57 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 cholesterol74%
- High blood pressure59%
- Arthritis54%
- Ischemic heart disease26%
- Osteoporosis24%
- Diabetes18%
Practice locations
Addresses where Sean D. Hilchey is enrolled with Medicare (CMS data updated October 2, 2026).
- 795 El Camino RealPalo Alto, CA 94301 (415) 600‑1020
Group practices
Medicare enrollment lists Sean D. Hilchey as a member of this group (CMS data updated October 2, 2026).
- Sutter Bay Medical Foundation3,829 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Palo Alto
Clinicians with the same Medicare primary specialty in Palo Alto, CA — not a recommendation.
Other clinicians in Sutter Bay Medical Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York Medical College |
| Graduation year | 1998 (28 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1306858204 |
| 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