Quick answers
- Does Samuel H. Yun accept Medicare assignment?
- Yes. Medicare's clinician data says Samuel H. Yun 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 Samuel H. Yun see?
- In 2024, CMS data shows 633 Original Medicare patients and 3,550 services for Samuel H. Yun. This counts Original Medicare only and measures volume, not quality.
- What is Samuel H. Yun's NPI number?
- 1790071694. 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 Samuel H. Yun, 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 | 633 |
|---|---|
| Services billed to Medicare | 3,550 |
| Different services or procedures | 37 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Imaging of retina (92134)565 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)431 services
- Established patient complete exam of visual system (92014)413 services
- Exam of visual field with extended testing (92083)241 services
- Injection of drug into eye (67028)124 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%
- Diabetes51%
- Arthritis43%
- Osteoporosis32%
- Anxiety18%
Practice locations
Addresses where Samuel H. Yun is enrolled with Medicare (CMS data updated October 2, 2026).
- 3959 Pender Dr, Suite 260Fairfax, VA 22030 (703) 364‑5400
- 8644 Sudley Rd, Suite 201Manassas, VA 20110 (703) 369‑8525
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Fairfax
Clinicians with the same Medicare primary specialty in Fairfax, VA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Virginia School Of Medicine |
| Graduation year | 2011 (15 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1790071694 |
| 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