Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Loudoun Medical Group, PC

Organization Gynecology Physician · NPI 1558936823

Loudoun Medical Group, PC is a Gynecology Physician in Dulles, Virginia. Registered with an NPI since 2021.

In the registry since
2021
What do these letters mean?
PC — Professional corporation
A form of business registration, not a clinical qualification.

See every abbreviation used in this directory →

Practice location Address checks out

24430 Stone Springs Blvd Ste 550
Dulles, VA 20166-2267
Phone: (703) 957-1245
Fax: (703) 665-2374
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gynecology Physician (primary) Taxonomy 207VG0400X

Record details

NPI number1558936823
Entity typeOrganization (Type 2)
Organization subpartYes
Parent organizationLoudoun Medical Group, PC
Authorized official Karyn Norton — Credentialing Coordinator · (571) 707-2048
Other names Robert L. Castle, Md; Robert L. Castle, Md
NPI enumeratedMay 20, 2021
Last updated in NPPESAugust 18, 2023
Certification dateAugust 18, 2023
Mailing address224d Cornwall St Nw Ste 403, Leesburg, VA 20176-2704