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ADVANCED ENT SPECIALIST
NPI 1215051693
Otolaryngology in Leesburg, VA

Active since March 19, 2007CLIA 49D1056449 · Waiver
19490 SANDRIDGE WAY, SUITE 230, LEESBURG, VA 20176(703) 858-5885(703) 858-5001 Get Directions Write a Review

NPPES record last updated: November 10, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 10, 2023, Jul 17, 2023, Sep 16, 2022 and 3 more (6 updates tracked since 2019).

About Advanced Ent Specialist NPPES

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

ADVANCED ENT SPECIALIST (NPI 1215051693) is a healthcare organization registered as an otolaryngology in Leesburg, Virginia and active in the NPI registry since March 2007. The organization holds a CLIA Waiver certificate valid through July 16, 2028 and lists Mary Beth Tamasy, Ceo, as its authorized official.

NPPES Registry Identity

NPI1215051693
Entity TypeOrganization
Primary Taxonomy207Y00000X
Legal Business NameLOUDOUN MEDICAL GROUP, PC
Location Address19490 SANDRIDGE WAY, SUITE 230Leesburg, VA 20176-3467
Mailing Address224d Cornwall St Nw Ste 403Leesburg, VA 20176-2704 · (703) 737-6001 · Fax (703) 443-8643
Phone(703) 858-5885
Fax(703) 858-5001
Organization SubpartYes
Authorized OfficialMary Beth TamasyCeo · (703) 737-6010
Enumeration DateMarch 19, 2007
Last NPPES UpdateNovember 10, 20236 updates tracked since enumeration
NPPES CertifiedNovember 10, 2023
✔ NPI 1215051693 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOtolaryngologyAllopathic & Osteopathic Physicians
Taxonomy Code207Y00000X
Definition
An otolaryngologist-head and neck surgeon provides comprehensive medical and surgical care for patients with diseases and disorders that affect the ears, nose, throat, the respiratory and upper alimentary systems and related structures of the head and neck. An otolaryngologist diagnoses and provides medical and/or surgical therapy or prevention of diseases, allergies, neoplasms, deformities, disorders and/or injuries of the ears, nose, sinuses, throat, respiratory and upper alimentary systems, face, jaws and the other head and neck systems. Head and neck oncology, facial plastic and reconstructive surgery and the treatment of disorders of hearing and voice are fundamental areas of expertise.
19490 SANDRIDGE WAY, SUITE 230, Leesburg, VA 20176
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Other Names 1

Doing Business AsAdvanced Ent Specialist

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-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)

Advanced Ent Specialist 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 Advanced Ent Specialist, which bills Medicare for the services they deliver. Of these, 6 practice at this address and 181 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
Oscar Adler, M.D., PHD
Nephrology
NPI 1700874138
19490 SANDRIDGE WAY, SUITE 120
Leesburg, VA 20176
(703) 723-5555
✔ PECOS✔ Accepts MedicareSame address
Kimberly Johnson, AU.D., CCC-A
Qualified Audiologist
NPI 1063630234
19490 SANDRIDGE WAY, SUITE 230
Leesburg, VA 20176
(703) 858-5885
✔ Accepts MedicareSame address
Mahesh Parameswaran, MD
Otolaryngology
NPI 1699753442
19490 SANDRIDGE WAY STE 230
Leesburg, VA 20176
(703) 858-5885
✔ PECOS✔ Accepts MedicareSame address
Joanna Schachtner, AU.D.
Qualified Audiologist
NPI 1538052758
19490 SANDRIDGE WAY, SUITE 230
Leesburg, VA 20176
(703) 858-5885
✔ Accepts MedicareSame address
Dawn Tutone, FNP-C
Nurse Practitioner
NPI 1790233872
19490 SANDRIDGE WAY, SUITE 240
Leesburg, VA 20176
(571) 223-5723
✔ PECOS✔ Accepts MedicareSame address
Jawad Khan, MD
Pulmonary Disease
NPI 1407865082
19490 SANDRIDGE WAY STE 210
Leesburg, VA 20176
(703) 723-7504
✔ PECOS✔ Accepts MedicareSame address
Syed Ali, M.D.
Hematology/Oncology
NPI 1780844233
19500 SANDRIDGE WAY, SUITE 450
Leesburg, VA 20176
(703) 656-9805
✔ PECOS✔ Accepts Medicare0.1 mi
Nicholas Caruana, M.D.
Diagnostic Radiology
NPI 1760617435
19500 SANDRIDGE WAY, SUITE 420
Leesburg, VA 20176
(571) 375-8601
✔ PECOS✔ Accepts Medicare0.1 mi
Michael Grimm, MD
Interventional Radiology
NPI 1447238050
19500 SANDRIDGE WAY, SUITE 420
Leesburg, VA 20176
(571) 375-8601
✔ PECOS✔ Accepts Medicare0.1 mi
Alessandra Catizone, CPNP
Nurse Practitioner
NPI 1922650258
19500 SANDRIDGE WAY SUITE 110
Leesburg, VA 20176
(703) 723-7337
✔ PECOS0.1 mi
Claire Edwards, MD
General Surgery
NPI 1134364599
19500 SANDRIDGE WAY, SUITE 450
Leeesburg, VA 20176
(703) 724-9474
✔ PECOS✔ Accepts Medicare0.1 mi
Lindsay Roach, D.O.
Pediatric Medicine
NPI 1659695526
19500 SANDRIDGE WAY SUITE 110
Leesburg, VA 20176
(703) 723-7337
✔ PECOS0.1 mi
Marcus Jennings, MD, MSPH
Family Practice
NPI 1114292588
19441 GOLF VISTA PLAZA SUITE 230 & 310
Leesburg, VA 20176
(703) 729-3420
✔ PECOS✔ Accepts Medicare0.1 mi
Charu Sabharwal, MD
Internal Medicine
NPI 1952401036
19441 GOLF VISTA PLZ STE 310
Leesburg, VA 20176
(703) 729-3420
✔ PECOS✔ Accepts Medicare0.1 mi
Keisha Sullivan, DO
Sleep Medicine
NPI 1437545720
19441 GOLF VISTA PLAZA, SUITES 230 & 310
Leesburg, VA 20176
(703) 729-3420
✔ PECOS✔ Accepts Medicare0.1 mi
Michael Todd, MD
Dermatology
NPI 1609860337
19465 DEERFIELD AVE SUITE 401
Leesburg, VA 20176
(703) 723-5700
✔ PECOS✔ Accepts Medicare0.2 mi
Lakshmi Mahendran
Physical Therapist in Private Practice
NPI 1841807278
19465 DEERFIELD AVENUE, SUITE 208
Leesburg, VA 20176
(571) 580-0220
✔ Accepts Medicare0.2 mi
Sarfraz Choudhary, MD
Infectious Disease
NPI 1619960242
44035 RIVERSIDE PARKWAY, SUITE 440
Leesburg, VA 20176
(703) 858-9966
✔ PECOS✔ Accepts Medicare0.2 mi
Kessie Herring, CNM
Certified Nurse Midwife (CNM)
NPI 1376305045
19455 DEERFIELD AVENUE, SUITE 204
Leesburg, VA 20176
(703) 858-1500
✔ PECOS✔ Accepts Medicare0.3 mi
Younghae Hyun Park, MD
Obstetrics/Gynecology
NPI 1134178965
19455 DEERFIELD AVENUE, SUITE 204
Leesburg, VA 20176
(703) 858-1500
✔ PECOS✔ Accepts Medicare0.3 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.

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 of Waiver 49D1056449

Advanced Ent Specialists · Leesburg, VA
Active · expires Jul 16, 2028
CLIA Number49D1056449
Laboratory TypePhysician Office
Certificate Effective DateJuly 17, 2026
Certificate Expiration DateJuly 16, 2028
Laboratory DirectorMahesh S. Parameswaren, MD
Laboratory Phone(703) 858-5885
Laboratory LocationAdvanced Ent Specialists19490 Sandridge Way, Suite 230, Leesburg, VA 20176
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

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 1215051693. It was assigned to this organization in the NPPES registry on March 19, 2007. The provider is doing business as Advanced Ent Specialist.

Where is Loudoun Medical Group, PC located?

Loudoun Medical Group, PC is located at 19490 Sandridge Way, Suite 230, Leesburg, VA 20176. The listed phone number is (703) 858-5885.

What is Loudoun Medical Group, PC's specialty?

The primary specialty registered for this NPI is Otolaryngology with taxonomy code 207Y00000X.

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, 6 practice at this address and 181 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 of Waiver (number 49D1056449) is associated with this NPI, valid through July 16, 2028. 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 November 10, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.