Quick answers
- Does Evan Siegel accept Medicare assignment?
- Yes. Medicare's clinician data says Evan 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 Evan Siegel see?
- In 2024, CMS data shows 819 Original Medicare patients and 108,697 services for Evan Siegel. This counts Original Medicare only and measures volume, not quality.
- What is Evan Siegel's NPI number?
- 1578562617. 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 Evan 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 | 819 |
|---|---|
| Services billed to Medicare | 108,697 |
| Different services or procedures | 134 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Injection, tocilizumab, 1 mg (J3262)23,560 services
- Injection, romosozumab-aqqg, 1 mg (J3111)19,950 services
- Injection, denosumab, 1 mg (J0897)19,380 services
- Injection, golimumab, 1 mg, for intravenous use (J1602)9,350 services
- Injection, methylprednisolone acetate, 1 mg (J1010)2,470 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%
- Arthritis73%
- High blood pressure68%
- Osteoporosis64%
- Ischemic heart disease25%
- Diabetes22%
Practice locations
Addresses where Evan Siegel is enrolled with Medicare (CMS data updated October 2, 2026).
- 14955 Shady Grove Rd, Suite 230Rockville, MD 20850 (301) 942‑7600
- 6410 Rockledge Dr, Suite 600Bethesda, MD 20817
- 7361 Calhoun Pl, Suite 600Rockville, MD 20855
Group practices
Medicare enrollment lists Evan Siegel as a member of these groups (CMS data updated October 2, 2026).
- Suburban/Nrh Medical Rehabilitation Inc941 clinicians in the group
- Arthritis and Rheumatism Associates PC50 clinicians in the group
Specialties
- Rheumatologyprimary
Other rheumatologists in Rockville
Clinicians with the same Medicare primary specialty in Rockville, MD — not a recommendation.
Other clinicians in Suburban/Nrh Medical Rehabilitation Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Boston University School Of Medicine |
| Graduation year | 1988 (38 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1578562617 |
| 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