Quick answers
- Does Rostam Nassiri accept Medicare assignment?
- Yes. Medicare's clinician data says Rostam Nassiri 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 Rostam Nassiri see?
- In 2024, CMS data shows 302 Original Medicare patients and 849 services for Rostam Nassiri. This counts Original Medicare only and measures volume, not quality.
- What is Rostam Nassiri's NPI number?
- 1366494288. 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 Rostam Nassiri, 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 | 302 |
|---|---|
| Services billed to Medicare | 849 |
| Different services or procedures | 45 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)302 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)149 services
- Injection, ketorolac tromethamine, per 15 mg (J1885)98 services
- Insertion of needle into vein for collection of blood sample (36415)48 services
- Injection, methylprednisolone sodium succinate, 5 mg (J2919)38 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 pressure74%
- High cholesterol71%
- Arthritis40%
- Diabetes36%
- Chronic kidney disease19%
- Anxiety18%
Practice locations
Addresses where Rostam Nassiri is enrolled with Medicare (CMS data updated October 2, 2026).
- 13823 Outlet DrSilver Spring, MD 20904 (301) 890‑8000
Specialties
- Family Practiceprimary
Other family doctors in Silver Spring
Clinicians with the same Medicare primary specialty in Silver Spring, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2001 (25 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366494288 |
| 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