1. Home
  2. Directory
  3. Virginia
  4. Williamsburg
  5. Internal Medicine
  6. NPI Profile

RIVERSIDE INTERNAL MEDICINE WILLIAMSBURG
NPI 1043589252
Internal Medicine in Williamsburg, VA

Active since December 16, 2011CLIA 49D2301755 · Waiver
3700 BATTERY BLVD STE 200, WILLIAMSBURG, VA 23185(757) 782-6350(757) 808-7010 Get Directions Write a Review

NPPES record last updated: July 22, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Riverside Internal Medicine Williamsburg NPPES

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

RIVERSIDE INTERNAL MEDICINE WILLIAMSBURG (NPI 1043589252) is a healthcare organization registered as an internal medicine in Williamsburg, Virginia and active in the NPI registry since December 2011. The organization holds a CLIA Waiver certificate valid through March 31, 2028 and lists Billie Jo Brown, Credentialing Manager, as its authorized official.

NPPES Registry Identity

NPI1043589252
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameRIVERSIDE PHYSICIAN SERVICES INC
Location Address3700 BATTERY BLVD STE 200Williamsburg, VA 23185-4888
Mailing Address856 J Clyde Morris Blvd, Suite ANewport News, VA 23601-1318 · (757) 594-4006 · Fax (757) 534-5190
Phone(757) 782-6350
Fax(757) 808-7010
Organization SubpartYesParent: Riverside Healthcare Assoicates
Authorized OfficialBillie Jo BrownCredentialing Manager · (757) 316-5901
Enumeration DateDecember 16, 2011
Last NPPES UpdateJuly 22, 2024
NPPES CertifiedJuly 22, 2024
✔ NPI 1043589252 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
3700 BATTERY BLVD STE 200, Williamsburg, VA 23185
Open in Google Maps ↗

Other Names 1

Doing Business AsRiverside Internal Medicine Williamsburg

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)

Riverside Internal Medicine Williamsburg is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

1,092

Medicare enrollment records show 1,092 clinicians reassign Medicare billing to Riverside Internal Medicine Williamsburg, which bills Medicare for the services they deliver. Of these, 3 practice at this address and 85 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 55

Nurse Practitioner236
Emergency Medicine139
Hospitalist112
Family Practice71
Internal Medicine66
Neurology53
Cardiovascular Disease (Cardiology)32
Obstetrics/Gynecology32
47 other specialties351

Nearest to this location (20)

See all 1,092
Roshan Acharya, M.D.
Pulmonary Disease
NPI 1386090686
3700 BATTERY BLVD STE 204
Williamsburg, VA 23185
(757) 645-3460
✔ PECOS✔ Accepts MedicareSame address
Deborah Almeda, FNP-C
Nurse Practitioner
NPI 1831851922
3700 BATTERY BLVD # 304
Williamsburg, VA 23185
(757) 782-6450
✔ PECOS✔ Accepts MedicareSame address
Matthew Laroe, M.D.
Endocrinology
NPI 1598290454
3700 BATTERY BLVD # 202
Williamsburg, VA 23185
(757) 645-3460
✔ PECOS✔ Accepts MedicareSame address
Michael Reynolds, M.D.
Hospitalist
NPI 1588954838
1500 COMMONWEALTH AVE
Williamsburg, VA 23185
(757) 585-2250
✔ PECOS✔ Accepts Medicare0.1 mi
Emma Burch, MD
Emergency Medicine
NPI 1235667510
1500 COMMONWEALTH AVE
Williamsburg, VA 23185
(757) 585-2200
✔ PECOS✔ Accepts Medicare0.1 mi
David Johnson, MD
Emergency Medicine
NPI 1437138559
1500 COMMONWEALTH AVE
Williamsburg, VA 23185
(757) 585-2250
✔ PECOS✔ Accepts Medicare0.1 mi
Kazir Kabir, DO
Emergency Medicine
NPI 1275062200
1500 COMMONWEALTH AVE
Williamsburg, VA 23185
(757) 585-2200
✔ PECOS✔ Accepts Medicare0.1 mi
Saskia Levine, MD
Hospitalist
NPI 1225771967
1500 COMMONWEALTH AVE
Williamsburg, VA 23185
(757) 585-2250
✔ PECOS✔ Accepts Medicare0.1 mi
Samuel Tabacchi, DO
Emergency Medicine
NPI 1366905721
1500 COMMONWEALTH AVE
Williamsburg, VA 23185
(757) 585-2000
✔ PECOS✔ Accepts Medicare0.1 mi
John Long, MD
Gastroenterology
NPI 1386619393
457 MCLAWS CIR
Williamsburg, VA 23185
(757) 221-0750
✔ PECOS✔ Accepts Medicare0.4 mi
Shahwali Arezo, MD
Gastroenterology
NPI 1215975370
457 MCLAWS CIR SUITE 1
Williamsburg, VA 23185
(757) 221-0750
✔ PECOS✔ Accepts Medicare0.4 mi
Shannon Dishman, FNP
Nurse Practitioner
NPI 1396204319
457 MCLAWS CIR STE 1
Williamsburg, VA 23185
(757) 221-0750
✔ PECOS✔ Accepts Medicare0.4 mi
Tia Barr, AGNP
Nurse Practitioner
NPI 1740715549
263 MCLAWS CIR STE 105
Williamsburg, VA 23185
(757) 941-5600
✔ PECOS✔ Accepts Medicare0.7 mi
Brandy Washburn, FNP-C
Nurse Practitioner
NPI 1215599717
5700 WILLIAMSBURG LANDING DR
Williamsburg, VA 23185
(800) 554-5517
✔ PECOS✔ Accepts Medicare2.9 mi
Amy Americo, MD
Hospitalist
NPI 1437168507
240 GOOCH DRIVE
Williamsburg, VA 23185
(757) 221-4386
2.9 mi
Zachary Morie, DO
Family Practice
NPI 1730611245
301 COLLEGE ROW UNIT 9101
Williamsburg, VA 23185
(757) 782-6200
✔ PECOS✔ Accepts Medicare3.5 mi
Mark Chisam, M.D.
Radiation Oncology
NPI 1053381251
3901 TREYBURN DR SUITE B
Williamsburg, VA 23185
(757) 220-4900
✔ PECOS✔ Accepts Medicare3.7 mi
Amanda Stiteler, M.D.
Urology
NPI 1679918700
120 KINGS WAY STE 3200
Williamsburg, VA 23185
(757) 253-0051
✔ PECOS4.0 mi
Krystal Ainsley, MD
Internal Medicine
NPI 1588890545
120 KINGS WAY SUITE 1400
Williamsburg, VA 23185
(757) 345-2555
✔ PECOS✔ Accepts Medicare4.0 mi
Robert Cullom, MD
Ophthalmology
NPI 1467439042
120 KINGS WAY SUITE 1300
Williamsburg, VA 23185
(757) 345-3001
✔ PECOS4.0 mi
See all 1,092 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 49D2301755

Riverside Internal Medicine Williamsburg · Williamsburg, VA
Active · expires Mar 31, 2028
CLIA Number49D2301755
Laboratory TypePhysician Office
Certificate Effective DateApril 1, 2026
Certificate Expiration DateMarch 31, 2028
Laboratory DirectorKrystal E. Ainsley
Laboratory Phone(757) 782-6350
Laboratory LocationRiverside Internal Medicine Williamsburg3700 Battery Boulevard, Suite 200, Williamsburg, VA 23185
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 Riverside Physician Services Inc's NPI number?

The NPI number for Riverside Physician Services Inc is 1043589252. It was assigned to this organization in the NPPES registry on December 16, 2011. The provider is doing business as Riverside Internal Medicine Williamsburg.

Where is Riverside Physician Services Inc located?

Riverside Physician Services Inc is located at 3700 Battery Blvd Ste 200, Williamsburg, VA 23185. The listed phone number is (757) 782-6350.

What is Riverside Physician Services Inc's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Riverside Physician Services Inc enrolled in Medicare?

Yes. Riverside Physician Services Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Riverside Physician Services Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1,092 clinicians in 55 Medicare specialties reassign their Medicare billing to Riverside Physician Services Inc. 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 (236), Emergency Medicine (139) and Hospitalist (112). Of these, 3 practice at this address and 85 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Riverside Physician Services Inc hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 49D2301755) is associated with this NPI, valid through March 31, 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 Riverside Physician Services Inc was last updated on July 22, 2024. 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.