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ASHBURN PEDIATRICS
NPI 1376677989
Pediatrics in Ashburn, VA

Active since March 15, 2007
20955 PROFESSIONAL PLAZA, STE 200, ASHBURN, VA 20147(703) 729-7652(703) 729-8746 Get Directions Write a Review

NPPES record last updated: April 24, 2023. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Sep 16, 2022, Mar 9, 2022, Aug 19, 2021 (3 updates tracked since 2021).

About Ashburn Pediatrics NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ASHBURN PEDIATRICS (NPI 1376677989) is a healthcare organization registered as a pediatrics in Ashburn, Virginia and active in the NPI registry since March 2007. The organization lists Mary Beth Tamasy, Ceo, as its authorized official.

NPPES Registry Identity

NPI1376677989
Entity TypeOrganization
Primary Taxonomy208000000X
Legal Business NameLOUDOUN MEDICAL GROUP, PC
Location Address20955 PROFESSIONAL PLAZA, STE 200Ashburn, VA 20147-3405
Mailing Address224d Cornwall Street, Nw, Ste 403Leesburg, VA 20176-2704 · (703) 737-6010 · Fax (703) 443-8643
Phone(703) 729-7652
Fax(703) 729-8746
Organization SubpartYes
Authorized OfficialMary Beth TamasyCeo · (703) 737-6010
Enumeration DateMarch 15, 2007
Last NPPES UpdateApril 24, 20233 updates tracked since enumeration
NPPES CertifiedApril 24, 2023
✔ NPI 1376677989 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
20955 PROFESSIONAL PLAZA, STE 200, Ashburn, VA 20147
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Other Names 1

Doing Business AsAshburn Pediatrics

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ashburn Pediatrics is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

291

Medicare enrollment records show 291 clinicians reassign Medicare billing to Ashburn Pediatrics, which bills Medicare for the services they deliver. Of these, 3 practice at this address and 198 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 35

Nurse Practitioner82
Family Practice29
Diagnostic Radiology24
Internal Medicine22
Certified Nurse Midwife (CNM)16
Obstetrics/Gynecology13
Urology13
Gastroenterology9
27 other specialties83

Nearest to this location (20)

See all 291
Kelly Welstead, CPNP
Nurse Practitioner
NPI 1730172164
20955 PROFESSIONAL PLZ STE 200
Ashburn, VA 20147
(703) 729-7652
✔ PECOSSame address
Maura Carroll, MD
Pediatric Medicine
NPI 1174516504
20955 PROFESSIONAL PLZ STE 200
Ashburn, VA 20147
(703) 729-7652
✔ PECOSSame address
Mallory Giles, CPNP-PC
Nurse Practitioner
NPI 1417623497
20955 PROFESSIONAL PLZ STE 200
Ashburn, VA 20147
(703) 729-7652
✔ PECOSSame address
Kim Diep, NP
Nurse Practitioner
NPI 1104768456
21035 SYCOLIN ROAD SUITE 180
Ashburn, VA 20147
(703) 783-5673
✔ PECOS✔ Accepts Medicare0.9 mi
Shreya Mathur
Nurse Practitioner
NPI 1346829413
21035 SYCOLIN ROAD, SUITE 180
Ashburn, VA 20147
(703) 783-5673
✔ PECOS✔ Accepts Medicare0.9 mi
Trupti Patel, M.D.
Family Practice
NPI 1780684191
21035 SYCOLIN ROAD, SUITE 180
Ashburn, VA 20147
(703) 783-5673
✔ PECOS✔ Accepts Medicare0.9 mi
Janet Perrotta, NP
Nurse Practitioner
NPI 1306371646
21035 SYCOLIN ROAD, SUITE 180
Ashburn, VA 20147
(703) 783-5673
✔ PECOS✔ Accepts Medicare0.9 mi
Kelly Spencer, FNP-BC
Nurse Practitioner
NPI 1639870652
21035 SYCOLIN ROAD, SUITE 180
Ashburn, VA 20147
(703) 783-5673
✔ PECOS✔ Accepts Medicare0.9 mi
Jasmine Hughes, MD
Pediatric Medicine
NPI 1710440375
44095 PIPELINE PLZ STE 410
Ashburn, VA 20147
(571) 223-2229
✔ PECOS1.9 mi
Timothy Mountcastle, MD
Plastic and Reconstructive Surgery
NPI 1821015561
44095 PIPELINE PLAZA, SUITE 430
Ashburn, VA 20147
(703) 858-3208
✔ PECOS✔ Accepts Medicare1.9 mi
Rachel Colquitt, FNP
Nurse Practitioner
NPI 1184610594
43300 SOUTHERN WALK PLZ SUITE 100
Broadlands, VA 20148
(571) 252-7353
✔ PECOS✔ Accepts Medicare2.0 mi
Rahib Poonawala, MD
Family Practice
NPI 1578522017
43300 SOUTHERN WALK PLAZA, SUITE 100
Broadlands, VA 20148
(571) 252-7353
✔ PECOS✔ Accepts Medicare2.0 mi
Jyothi Varghese
Physical Therapist in Private Practice
NPI 1982670394
42992 MARBURG TER
Broadlands, VA 20148
(201) 696-2085
2.2 mi
Kyle Panzer, MD
Diagnostic Radiology
NPI 1790246916
20116 ASHBROOK PL STE 150
Ashburn, VA 20147
(703) 385-5203
✔ PECOS✔ Accepts Medicare2.8 mi
Gavin Foster, MD
Obstetrics/Gynecology
NPI 1609860915
44055 RIVERSIDE PKWY STE 238
Leesburg, VA 20176
(703) 858-3070
✔ PECOS3.0 mi
Shannon Lehr, M.D.
General Surgery
NPI 1497847347
44055 RIVERSIDE PKWY SUITE 246
Leesburg, VA 20176
(703) 858-3200
✔ PECOS3.0 mi
Jon Mader, M.D.
Physical Medicine and Rehabilitation
NPI 1255656864
44055 RIVERSIDE PARKWAY, SUITE 216
Leesburg, VA 20176
(703) 840-0665
✔ PECOS✔ Accepts Medicare3.0 mi
Shahid Siddiqui
Internal Medicine
NPI 1386662757
44055 RIVERSIDE PARKWAY, SUITE 216
Leesburg, VA 20176
(703) 858-1395
✔ PECOS✔ Accepts Medicare3.0 mi
Sarfraz Choudhary, MD
Infectious Disease
NPI 1619960242
44035 RIVERSIDE PARKWAY, SUITE 440
Leesburg, VA 20176
(703) 858-9966
✔ PECOS✔ Accepts Medicare3.0 mi
Mei-Hwa Firestone, MD
Hematology/Oncology
NPI 1699909093
19500 SANDRIDGE WAY, SUITE 450
Leesburg, VA 20176
(703) 656-9805
✔ PECOS✔ Accepts Medicare3.0 mi
See all 291 clinicians

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently 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 1376677989. It was assigned to this organization in the NPPES registry on March 15, 2007. The provider is doing business as Ashburn Pediatrics.

Where is Loudoun Medical Group, PC located?

Loudoun Medical Group, PC is located at 20955 Professional Plaza, Ste 200, Ashburn, VA 20147. The listed phone number is (703) 729-7652.

What is Loudoun Medical Group, PC's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

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, 3 practice at this address and 198 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Loudoun Medical Group, PC was last updated on April 24, 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.