Quick answers
- Does Marc J. Siegel accept Medicare assignment?
- Yes. Medicare's clinician data says Marc J. Siegel 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 Marc J. Siegel see?
- In 2024, CMS data shows 760 Original Medicare patients and 3,346 services for Marc J. Siegel. This counts Original Medicare only and measures volume, not quality.
- What is Marc J. Siegel's NPI number?
- 1740265461. 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 Marc J. Siegel, 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 | 760 |
|---|---|
| Services billed to Medicare | 3,346 |
| Different services or procedures | 36 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Exam of visual field with extended testing (92083)451 services
- Photography of the retina (92250)399 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)394 services
- Exam of the internal drainage system of eye (92020)388 services
- Established patient complete exam of visual system (92014)338 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%
- Arthritis42%
- Ischemic heart disease35%
- Diabetes30%
- Chronic kidney disease24%
Practice locations
Addresses where Marc J. Siegel is enrolled with Medicare (CMS data updated October 2, 2026).
- 1750 S Telegraph Rd, Suite 205Bloomfield Hills, MI 48302 (248) 333‑2900
Group practices
Medicare enrollment lists Marc J. Siegel as a member of this group (CMS data updated October 2, 2026).
- Grosinger Spigelman and Grey Eye Surgeons PC6 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Bloomfield Hills
Clinicians with the same Medicare primary specialty in Bloomfield Hills, MI — not a recommendation.
Other clinicians in Grosinger Spigelman and Grey Eye Surgeons PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Michigan Medical School |
| Graduation year | 1989 (37 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1740265461 |
| 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