STERLING FAMILY PRACTICE
NPI 1457475857
Family Medicine in Sterling, VA
About Sterling Family Practice NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STERLING FAMILY PRACTICE (NPI 1457475857) is a healthcare organization registered as a family medicine in Sterling, Virginia and active in the NPI registry since March 2007. The organization holds a CLIA Microscopy certificate valid through November 23, 2026 and lists Mary Beth Tamasy, Ceo, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 1
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Sterling Family Practice is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
291Medicare enrollment records show 291 clinicians reassign Medicare billing to Sterling Family Practice, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 173 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 35
Nearest to this location (20)
See all 291Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate for Provider-Performed Microscopy Procedures (PPMP) 49D0876677
Sterling Family Practice · Sterling, VAFrequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Loudoun Medical Group, PC's NPI number?
The NPI number for Loudoun Medical Group, PC is 1457475857. It was assigned to this organization in the NPPES registry on March 19, 2007. The provider is doing business as Sterling Family Practice.
Where is Loudoun Medical Group, PC located?
Loudoun Medical Group, PC is located at 21135 Whitfield Pl Suite 107, Sterling, VA 20165. The listed phone number is (703) 421-7000.
What is Loudoun Medical Group, PC's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Loudoun Medical Group, PC enrolled in Medicare?
Yes. Loudoun Medical Group, PC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Loudoun Medical Group, PC?
According to the CMS Revalidation Reassignment List (October 2026 release), 291 clinicians in 35 Medicare specialties reassign their Medicare billing to Loudoun Medical Group, PC. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Nurse Practitioner (82), Family Practice (29) and Diagnostic Radiology (24). Of these, 1 practice at this address and 173 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Loudoun Medical Group, PC hold a CLIA laboratory certificate?
Yes. A Certificate for Provider-Performed Microscopy Procedures (PPMP) (number 49D0876677) is associated with this NPI, valid through November 23, 2026. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
When was this NPI record last updated?
The NPPES record for Loudoun Medical Group, PC was last updated on August 18, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Sterling Family Practice · NPI 1457475857
Family Medicine organization in Sterling, Virginia. Organization record, active in the CMS NPPES registry since March 19, 2007.
## Identity
- **NPI:** 1457475857 (Entity type: Organization)
- **Enumerated:** March 19, 2007
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **Legal business name:** Loudoun Medical Group, Pc
- **Organization subpart:** Yes (part of Loudoun Medical Group, Pc)
- **Authorized official:** Mary Beth Tamasy, CEO
## Practice location
- **Address:** 21135 WHITFIELD PL, SUITE 107, Sterling, VA 20165-7283
- **Phone:** (703) 421-7000 · **Fax:** (703) 430-4830
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 291 clinicians in 35 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (82), Family Practice (29), Diagnostic Radiology (24); 1 practice at this address and 173 within 10 miles; [full list](https://npiprofile.com/npi/1457475857/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** August 18, 2023
- **Other identifiers:** Other CG8678 (VA)
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1457475857) · Data from the CMS NPPES public registry.