Quick answers
- Does Yousef Zarbalian accept Medicare assignment?
- Yes. Medicare's clinician data says Yousef Zarbalian 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 Yousef Zarbalian see?
- In 2024, CMS data shows 65 Original Medicare patients and 870 services for Yousef Zarbalian. This counts Original Medicare only and measures volume, not quality.
- What is Yousef Zarbalian's NPI number?
- 1396063319. 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 Yousef Zarbalian, 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 | 65 |
|---|---|
| Services billed to Medicare | 870 |
| Different services or procedures | 24 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Therapy procedure using massage, each 15 minutes (97124)188 services
- Acupuncture with electrical stimulation, initial 15 minutes (97813)168 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)150 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)133 services
- Acupuncture with electrical stimulation, each additional 15 minutes (97814)51 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 cholesterol68%
- Arthritis62%
- High blood pressure54%
- Osteoporosis26%
- Ischemic heart disease23%
- Diabetes20%
Practice locations
Addresses where Yousef Zarbalian is enrolled with Medicare (CMS data updated October 2, 2026).
- 226 Maple Ave W, Suite 202Vienna, VA 22180 (703) 372‑2646
Specialties
- Rheumatologyprimary
- Internal Medicinealso
Other rheumatologists in Virginia
Clinicians with the same Medicare primary specialty in Virginia — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Washington University School Of Medicine |
| Graduation year | 2010 (16 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) | 1396063319 |
| 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