LOUDOUN MEDICAL GROUP, PC
LOUDOUN MEDICAL GROUP, PC is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1003335886, based in Sterling, VA. It is classified under Family Medicine Physician.
Getting there
Here is what surrounds this office in Sterling, based on OpenStreetMap data collected Sep 19, 2026. Parking is available about 575 ft away. The nearest transit stop is 0.20 mi away, served by Potomac View Rd & Signal Hill Plaza. If you arrive early, there is a coffee shop 714 ft away.
Getting here and what is nearby
Transit 419 ft ~2 min
Parking 483 ft ~2 min
Parking 485 ft ~2 min
Restaurant CAVA 503 ft ~2 min
21475 Epicerie Plaza, Sterling 20164
Restaurant Mika's Neapolitan Pizza 536 ft ~3 min
Parking 575 ft ~3 min
Convenience Tiger Mart 664 ft ~3 min
46373 Bartholomew Fair Drive
Restaurant Burtons Grill & Bar 663 ft ~3 min
21434 Epicerie Plaza, Sterling 20164
Coffee Cat Lounge Meows Corner 714 ft ~3 min
Gas station Exxon 741 ft ~3 min
46373 Bartholomew Fair Drive, Sterling 20164-6618
24/7
Transit 789 ft ~3 min
Transit Potomac View Rd & Signal Hill Plaza 0.20 mi ~4 min
Grocery Harris Teeter 0.21 mi ~5 min
21399 Epicerie Plaza, Sterling 20164
Mo-Su 05:00-24:00
Hotel Hampton Inn 0.43 mi ~9 min
Hotel MainStay Suites 0.50 mi ~11 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
NPPES does not list a state licence number for this record. That is not unusual — organizations and some provider types are not required to file one. Verify current licensure with the relevant state board before care.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Family Medicine covers
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity. NUCC Health Care Provider Taxonomy, code 207Q00000X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1003335886 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Sep 13, 2017 |
| Last updated | Aug 17, 2023 |
| Status | Active |
| Practice address |
46440 BENEDICT DRIVE, SUITE 107 Sterling, VA 20164 (571) 707-2079 Fax (571) 291-9196 |
| Mailing address |
224-D CORNWALL STREET, NW, SUITE 403 Leesburg, VA 20176 |
| Other names |
Valerie Williamson, Md Former Legal Name |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 3 | 3 | 5 | 8 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 3 | 1 | 8 | 7 |
Sum = 54 · next multiple of 10 = 60 · check digit = 6 · actual last digit = 6
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.