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GWILYM PARRY MDPC
NPI 1104352061
Internal Medicine in Reston, VA

Active since May 11, 2017CLIA 49D2247437 · Waiver
1830 TOWN CENTER DR STE 207, RESTON, VA 20190(703) 435-2227(703) 435-7856 Get Directions Write a Review

NPPES record last updated: August 13, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 13, 2023, May 11, 2017 (2 updates tracked since 2017).

About Gwilym Parry Mdpc NPPES

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

GWILYM PARRY MDPC (NPI 1104352061) is a healthcare organization registered as an internal medicine in Reston, Virginia and active in the NPI registry since May 2017. The organization holds a CLIA Waiver certificate valid through January 5, 2028 and lists Elaine Frater, Billing Manager, as its authorized official.

NPPES Registry Identity

NPI1104352061
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameGWILYM PARRY MDPC
Location Address1830 TOWN CENTER DR STE 207Reston, VA 20190-3236
Mailing Address1830 Town Center Dr Ste 207Reston, VA 20190-3236 · (703) 435-2227 · Fax (703) 435-7856
Phone(703) 435-2227
Fax(703) 435-7856
Organization SubpartNo
Authorized OfficialElaine FraterBilling Manager · (703) 435-2227
Enumeration DateMay 11, 2017
Last NPPES UpdateAugust 13, 20232 updates tracked since enumeration
NPPES CertifiedAugust 13, 2023
✔ NPI 1104352061 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in VA · 0101041163
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.
1830 TOWN CENTER DR STE 207, Reston, VA 20190
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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)

Gwilym Parry Mdpc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Gwilym Parry Mdpc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Gwilym Parry, MD
Internal Medicine
NPI 1508961962
1830 TOWN CENTER DR STE 207
Reston, VA 20190
(703) 435-2227
✔ PECOS✔ Accepts MedicareSame address

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 49D2247437

Gwilym Parry MD PC · Reston, VA
Active · expires Jan 5, 2028
CLIA Number49D2247437
Laboratory TypePhysician Office
Certificate Effective DateJanuary 6, 2026
Certificate Expiration DateJanuary 5, 2028
Laboratory DirectorGwilym Parry
Laboratory Phone(703) 435-2227
Laboratory LocationGwilym Parry MD PC1830 Town Center Dr Suite 207, Reston, VA 20190
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 Gwilym Parry Mdpc's NPI number?

The NPI number for Gwilym Parry Mdpc is 1104352061. It was assigned to this organization in the NPPES registry on May 11, 2017.

Where is Gwilym Parry Mdpc located?

Gwilym Parry Mdpc is located at 1830 Town Center Dr Ste 207, Reston, VA 20190. The listed phone number is (703) 435-2227.

What is Gwilym Parry Mdpc's specialty?

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

Is Gwilym Parry Mdpc enrolled in Medicare?

Yes. Gwilym Parry Mdpc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Gwilym Parry Mdpc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Gwilym Parry Mdpc. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Gwilym Parry Mdpc hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 49D2247437) is associated with this NPI, valid through January 5, 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 Gwilym Parry Mdpc was last updated on August 13, 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.