Quick answers
- Does Sean M. McDonough accept Medicare assignment?
- Yes. Medicare's clinician data says Sean M. McDonough 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 Sean M. McDonough see?
- In 2024, CMS data shows 58 Original Medicare patients and 282 services for Sean M. McDonough. This counts Original Medicare only and measures volume, not quality.
- What is Sean M. McDonough's NPI number?
- 1700418175. 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 Sean M. McDonough, 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 | 58 |
|---|---|
| Services billed to Medicare | 282 |
| Different services or procedures | 12 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)29 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)16 services
- Aspiration and/or injection of fluid from large joint (20610)13 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 cholesterol71%
- High blood pressure69%
- Arthritis57%
- Ischemic heart disease31%
- Diabetes28%
- Anxiety24%
Practice locations
Addresses where Sean M. McDonough is enrolled with Medicare (CMS data updated October 2, 2026).
- 3299 Woodburn RdAnnandale, VA 22003 (703) 205‑2626
- 3299 Woodburn Rd, Suite 370Annandale, VA 22003 (703) 205‑2626
- 44045 Rivderside PkwyLeesburg, VA 20176
- 8501 Arlington BlvdFairfax, VA 22031
Group practices
Medicare enrollment lists Sean M. McDonough as a member of this group (CMS data updated October 2, 2026).
- Inova Health Care Services1,817 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Annandale
Clinicians with the same Medicare primary specialty in Annandale, VA — not a recommendation.
Other clinicians in Inova Health Care Services
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2020 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1700418175 |
| 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