Active NPI
Sophie Kaponis
- Physician Assistant
- Fairfax, VA
National Provider Identifier
1265248934
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Physician Assistant
- License
- 0110011571
- Practice address
- 8501 Arlington Blvd Ste 500
Fairfax, VA 22031-4631 - Phone
- (703) 876-0734
- NPI assigned
- Dec 9, 2024
- Sex
- Female
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Physician Assistant | 363A00000X | 0110011571 | VA | Primary |
Addresses
Primary practice location
8501 Arlington Blvd Ste 500
Fairfax, VA 22031-4631
Mailing address
8501 Arlington Blvd Ste 500
Fairfax, VA 22031-4631
Phone (703) 876-0734
Other names 1
- Sophie Newhouse
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in MD, DC
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: No
Enrollment records 2
Care Compare profile
Medicare Care Compare- Specialty
- Physician Assistant
- Education
- Other, 2024
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Telehealth
- Offers telehealth services
- Group practices
Practice addresses (Care Compare)
818 W Diamond Ave
Suite 130
Gaithersburg, MD 20878-1417
Phone (301) 762-7723
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Physician Assistant
Interoperability endpoints
- sophie.newhouse.1@22023.direct.athenahealth.com
Organizations & group practices 1
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1733702400000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1782345600000",
"number": "1265248934",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "8501 ARLINGTON BLVD STE 500",
"city": "FAIRFAX",
"state": "VA",
"postal_code": "220314631",
"telephone_number": "703-876-0734"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "8501 ARLINGTON BLVD STE 500",
"city": "FAIRFAX",
"state": "VA",
"postal_code": "220314631",
"telephone_number": "703-876-0734"
}
],
"practiceLocations": [],
"basic": {
"last_name": "KAPONIS",
"first_name": "SOPHIE",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2024-12-09",
"last_updated": "2026-06-25",
"certification_date": "2026-06-25",
"status": "A"
},
"taxonomies": [
{
"code": "363A00000X",
"taxonomy_group": "",
"desc": "Physician Assistant",
"state": "VA",
"license": "0110011571",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": [
{
"first_name": "SOPHIE",
"last_name": "NEWHOUSE",
"code": "1",
"type": "Former Name"
}
]
}Other providers in Fairfax, VA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 25, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.