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GASTROENTEROLOGY ASSOCIATES VA, LLC
NPI 1518990472
Internal Medicine - Gastroenterology in Gainesville, VA

Active since July 07, 2006CLIA Certified · 7 labs
7915 LAKE MANASSAS DR STE 302, GAINESVILLE, VA 20155(571) 248-0653(571) 248-0658 Get Directions Write a Review

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

Record update history: Feb 3, 2026, Sep 3, 2025, Mar 10, 2025 and 1 more (4 updates tracked since 2024).

About Gastroenterology Associates Va, Llc NPPES

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

GASTROENTEROLOGY ASSOCIATES VA, LLC (NPI 1518990472), doing business as Colon Stomach & Liver Center, is a healthcare organization registered as a gastroenterology in Gainesville, Virginia and active in the NPI registry since July 2006. The organization holds 7 active CLIA laboratory certificates, maintains 8 additional practice locations, and lists Kristina Materna, Director, Credentialing, as its authorized official.

NPPES Registry Identity

NPI1518990472
Entity TypeOrganization
Primary Taxonomy207RG0100X
Legal Business NameGASTROENTEROLOGY ASSOCIATES VA, LLC
Location Address7915 LAKE MANASSAS DR STE 302Gainesville, VA 20155-3260
Mailing AddressPo Box 381468Germantown, TN 38183-1468 · Fax (901) 328-1355
Phone(571) 248-0653
Fax(571) 248-0658
Organization SubpartNo
Authorized OfficialKristina MaternaDirector, Credentialing · (901) 377-8219
Enumeration DateJuly 7, 2006
Last NPPES UpdateFebruary 10, 20264 updates tracked since enumeration
NPPES CertifiedFebruary 10, 2026
✔ NPI 1518990472 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in VA · 0101027526
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
7915 LAKE MANASSAS DR STE 302, Gainesville, VA 20155
Open in Google Maps ↗

Other Names 3

Doing Business AsColon Stomach & Liver Center
Doing Business AsGastroenterology Associates, Pc
Doing Business AsTidewater Gastroenterology

Secondary Practice Locations 8

Location 1661 Independence Pkwy Ste 120Chesapeake, VA 23320-5114 · Phone (757) 547-0798
Location 219455 Deerfield Ave Ste 205Lansdowne, VA 20176-8102 · Phone (703) 723-3670
Location 319455 Deerfield Ave Ste 201Lansdowne, VA 20176-8102 · Phone (703) 723-3670
Location 48640 Sudley Rd Ste 201Manassas, VA 20110-4404 · Phone (703) 368-6819
Location 5170 W Shirley Ave Ste 205Warrenton, VA 20186-3083 · Phone (540) 347-2470
Location 619455 Deerfield Ave Ste 202Lansdowne, VA 20176-8102 · Phone (703) 723-3670
Location 724430 Stone Springs Blvd Ste 250Dulles, VA 20166-2268 · Phone (703) 723-3670 ext. 33670
Location 85701 Cleveland St Ste 100Virginia Beach, VA 23462-1788 · Phone (757) 547-0798

Other Identifiers 1

Medicaid1518990472VA

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)

Gastroenterology Associates Va, Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

47

Medicare enrollment records show 47 clinicians reassign Medicare billing to Gastroenterology Associates VA, LLC, which bills Medicare for the services they deliver. Of these, 3 practice at this address and 12 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 4

Gastroenterology22
Certified Registered Nurse Anesthetist (CRNA)15
Nurse Practitioner6
Pathology4

Nearest to this location (20)

See all 47
Candace Hall, FNP-C
Nurse Practitioner
NPI 1801412242
7915 LAKE MANASSAS DR STE 302
Gainesville, VA 20155
(571) 248-0653
✔ PECOS✔ Accepts MedicareSame address
Brian Park, M.D.
Gastroenterology
NPI 1427311851
7915 LAKE MANASSAS DR STE 302
Gainesville, VA 20155
(571) 248-0653
✔ PECOS✔ Accepts MedicareSame address
Mylan Satchi, M.D.
Gastroenterology
NPI 1629269527
7915 LAKE MANASSAS DR STE 302
Gainesville, VA 20155
(571) 248-0653
✔ PECOS✔ Accepts MedicareSame address
Rizwan Ahmed, M.D.
Gastroenterology
NPI 1841469061
8640 SUDLEY RD STE 201
Manassas, VA 20110
(703) 368-6819
✔ PECOS✔ Accepts Medicare8.5 mi
Tokunbo Ajayi, M.D.
Gastroenterology
NPI 1255625307
8640 SUDLEY RD STE 201
Manassas, VA 20110
(703) 368-6819
✔ PECOS✔ Accepts Medicare8.5 mi
Paul Arnold, MD
Gastroenterology
NPI 1992828693
8640 SUDLEY RD STE 201
Manassas, VA 20110
(703) 368-6819
✔ PECOS✔ Accepts Medicare8.5 mi
Darren Baroni, MD
Gastroenterology
NPI 1154377497
8640 SUDLEY RD STE 201
Manassas, VA 20110
(703) 368-6819
✔ PECOS✔ Accepts Medicare8.5 mi
Sara Herbst, APRN
Nurse Practitioner
NPI 1790203586
8640 SUDLEY RD STE 201
Manassas, VA 20110
(703) 368-6819
✔ PECOS✔ Accepts Medicare8.5 mi
Kibbum Kang, NURSE PRACTITIONER
Nurse Practitioner
NPI 1548502347
8640 SUDLEY RD STE 201
Manassas, VA 20110
(703) 368-6819
✔ PECOS✔ Accepts Medicare8.5 mi
Edward Kim, MD
Gastroenterology
NPI 1275538076
8640 SUDLEY RD STE 201
Manassas, VA 20110
(703) 368-6819
✔ PECOS✔ Accepts Medicare8.5 mi
Tinatin O Connell, M.D.
Gastroenterology
NPI 1720253503
8640 SUDLEY RD STE 201
Manassas, VA 20110
(703) 368-6819
✔ PECOS✔ Accepts Medicare8.5 mi
Jin-Hong Park, MD
Gastroenterology
NPI 1225033038
8640 SUDLEY RD STE 201
Manassas, VA 20110
(703) 368-6819
✔ PECOS✔ Accepts Medicare8.5 mi
Fatemeh Khedmati, MD
Pathology
NPI 1164659454
3600 JOSEPH SIEWICK DR
Fairfax, VA 22033
(703) 391-3654
✔ PECOS✔ Accepts Medicare16 mi
Chandra Adhikari, APRN
Nurse Practitioner
NPI 1912754078
19455 DEERFIELD AVE STE 201
Lansdowne, VA 20176
(703) 723-3670
✔ PECOS✔ Accepts Medicare22 mi
Juan De La Ossa, DO
Gastroenterology
NPI 1700382579
19455 DEERFIELD AVE STE 201
Lansdowne, VA 20176
(703) 723-3670
✔ PECOS✔ Accepts Medicare22 mi
Hiwot Desta, MD
Gastroenterology
NPI 1558321091
19455 DEERFIELD AVE STE 201
Lansdowne, VA 20176
(703) 723-3670
✔ PECOS✔ Accepts Medicare22 mi
Satinder Gill, MD
Gastroenterology
NPI 1487614913
19455 DEERFIELD AVE STE 201
Lansdowne, VA 20176
(703) 723-3670
✔ PECOS✔ Accepts Medicare22 mi
Rahul Kataria, M.D.
Gastroenterology
NPI 1538401831
19455 DEERFIELD AVE STE 201
Lansdowne, VA 20176
(703) 723-3670
✔ PECOS✔ Accepts Medicare22 mi
Aubrey Ligon, APRN
Nurse Practitioner
NPI 1952288003
19455 DEERFIELD AVE STE 201
Lansdowne, VA 20176
(703) 723-3670
✔ PECOS✔ Accepts Medicare22 mi
Soheila Yadrandji, MD
Pathology
NPI 1033104054
19455 DEERFIELD AVE STE 202
Lansdowne, VA 20176
(703) 723-3670
✔ PECOS✔ Accepts Medicare22 mi
See all 47 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 7

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 49D0723022

Gastroenterology Associates, PC, Dba Tidewater Gastro · Chesapeake, VA
Active · expires Aug 31, 2028
CLIA Number49D0723022
Laboratory TypePhysician Office
Certificate Effective DateSeptember 1, 2026
Certificate Expiration DateAugust 31, 2028
Laboratory DirectorFelix P. Tiongco
Laboratory Phone(757) 547-0798
Laboratory LocationGastroenterology Associates, PC, Dba Tidewater Gastro661 Independence Parkway, Suite 120, Chesapeake, VA 23320
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Waiver 49D0878842

Gastroenterology Associates, PC · Manassas, VA
Active · expires Nov 7, 2027
CLIA Number49D0878842
Laboratory TypePhysician Office
Certificate Effective DateNovember 8, 2025
Certificate Expiration DateNovember 7, 2027
Laboratory DirectorEdward C. Kim
Laboratory Phone(571) 248-0653
Laboratory LocationGastroenterology Associates, PC8640 Sudley Road, Suite 201, Manassas, VA 20110
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Waiver 49D0899052

Gastroenterology Associates, PC · Warrenton, VA
Active · expires Mar 19, 2027
CLIA Number49D0899052
Laboratory TypePhysician Office
Certificate Effective DateMarch 20, 2025
Certificate Expiration DateMarch 19, 2027
Laboratory DirectorJin H. Park
Laboratory Phone(571) 248-0653
Laboratory LocationGastroenterology Associates, PC170 W Shirley Ave Suite 205, Warrenton, VA 20186
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Waiver 49D1095048

Gastroenterology Associates Pc,dba Tidewater Gastro · Virginia Beach, VA
Active · expires Feb 1, 2027
CLIA Number49D1095048
Laboratory TypePhysician Office
Certificate Effective DateFebruary 2, 2025
Certificate Expiration DateFebruary 1, 2027
Laboratory DirectorFelix P. Tiongco
Laboratory Phone(757) 547-0798
Laboratory LocationGastroenterology Associates Pc,dba Tidewater Gastro5701 Cleveland Street - Suite 100, Virginia Beach, VA 23462
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Waiver 49D1091493

Gastreonterology Associates, PC · Gainesville, VA
Active · expires Jan 10, 2028
CLIA Number49D1091493
Laboratory TypePhysician Office
Certificate Effective DateJanuary 11, 2026
Certificate Expiration DateJanuary 10, 2028
Laboratory DirectorDarren Baroni
Laboratory Phone(571) 248-0653
Laboratory LocationGastreonterology Associates, PC7915 Lake Manassas Drive, Suite 302, Gainesville, VA 20155
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Compliance 49D2021788

Gastroenterology Associates Of Tidewater · Chesapeake, VA
Active · expires Sep 11, 2027
CLIA Number49D2021788
Laboratory TypePhysician Office
Certificate Effective DateSeptember 12, 2025
Certificate Expiration DateSeptember 11, 2027
Laboratory DirectorLionel N. Jacob
Laboratory Phone(757) 547-0798
Laboratory LocationGastroenterology Associates Of Tidewater661 Independance Pkwy, Suite 120, Chesapeake, VA 23320
CLIA data matches this NPI record on: Name Phone
This certificate is issued to a laboratory after an inspection that finds the laboratory to be in compliance with all applicable CLIA requirements.

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 Gastroenterology Associates VA, LLC's NPI number?

The NPI number for Gastroenterology Associates VA, LLC is 1518990472. It was assigned to this organization in the NPPES registry on July 7, 2006. The provider is doing business as Colon Stomach & Liver Center, Gastroenterology Associates, PC and Tidewater Gastroenterology.

Where is Gastroenterology Associates VA, LLC located?

Gastroenterology Associates VA, LLC is located at 7915 Lake Manassas Dr Ste 302, Gainesville, VA 20155. The listed phone number is (571) 248-0653.

What is Gastroenterology Associates VA, LLC's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Gastroenterology Associates VA, LLC enrolled in Medicare?

Yes. Gastroenterology Associates VA, LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Gastroenterology Associates VA, LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 47 clinicians in 4 Medicare specialties reassign their Medicare billing to Gastroenterology Associates VA, LLC. 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 Gastroenterology (22), Certified Registered Nurse Anesthetist (CRNA) (15) and Nurse Practitioner (6). Of these, 3 practice at this address and 12 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Gastroenterology Associates VA, LLC hold CLIA laboratory certificates?

Yes. 7 active CLIA laboratory certificates are associated with this NPI under the federal Clinical Laboratory Improvement Amendments program. The certificates are listed in the CLIA Laboratory Certificates section above.

When was this NPI record last updated?

The NPPES record for Gastroenterology Associates VA, LLC was last updated on February 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months 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.