Active NPI
Retina and Vitreous of Delaware Valley, PC
- Retina Specialist (Ophthalmology) Physician
- Newport, VT
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Retina Specialist (Ophthalmology) Physician
- License
- MD443007
- Legal business name
- RETINA AND VITREOUS OF DELAWARE VALLEY, PC
- Practice address
- 5452 US Route 5 Ste H
Newport, VT 05855-9037 - Phone
- (855) 250-3937
- Fax
- (855) 250-5500
- NPI assigned
- Aug 4, 2017
- Last updated
- Jan 2, 2026
- Organization subpart
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Authorized official
- Name
- Dr. William Joseph Foster, MD
- Title
- Physician
- Phone
- (855) 250-3937
Authorized official NPPES reports the official by name only. The link goes to the one practitioner connected to this organization with that name.
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Retina Specialist (Ophthalmology) Physician | 207WX0107X | MD443007 | PA | Primary |
Addresses
Primary practice location
5452 US Route 5 Ste H
Newport, VT 05855-9037
Mailing address
2207 Concord Pike # 166
Wilmington, DE 19803-2908
Phone (855) 250-3937
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in VT
Enrollment records 1
National Provider Directory
National Provider DirectoryLocations
491 Baltimore Pike
Ste 304
Springfield, PA 19064
42 E Street Rd
Ste 46
West Chester, PA 19382
Phone (855) 250-3937
5452 US Route 5
Ste H
Newport, VT 05855
Phone (802) 334-1515
Practitioners & affiliated clinicians
Practitioners 4
Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles, and the practitioner matching its NPPES authorized official.
-
- Retina Specialist (Ophthalmology) Physician
- NPI 1356390462
VT
-
- Optometrist
- Newport, VT
- NPI 1952396988
-
- Optometrist
- Davie, FL
- NPI 1154495141
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1501804800000",
"enumeration_type": "NPI-2",
"last_updated_epoch": "1767312000000",
"number": "1093230500",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "2207 CONCORD PIKE # 166",
"city": "WILMINGTON",
"state": "DE",
"postal_code": "198032908",
"telephone_number": "855-250-3937",
"fax_number": "855-250-5500"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "5452 US ROUTE 5 STE H",
"city": "NEWPORT",
"state": "VT",
"postal_code": "058559037",
"telephone_number": "855-250-3937",
"fax_number": "855-250-5500"
}
],
"practiceLocations": [],
"basic": {
"organization_name": "RETINA AND VITREOUS OF DELAWARE VALLEY, PC",
"organizational_subpart": "NO",
"enumeration_date": "2017-08-04",
"last_updated": "2026-01-02",
"certification_date": "2026-01-02",
"status": "A",
"authorized_official_last_name": "FOSTER",
"authorized_official_first_name": "WILLIAM",
"authorized_official_middle_name": "JOSEPH",
"authorized_official_title_or_position": "PHYSICIAN",
"authorized_official_telephone_number": "855-250-3937",
"authorized_official_name_prefix": "Dr.",
"authorized_official_credential": "MD"
},
"taxonomies": [
{
"code": "207WX0107X",
"taxonomy_group": "",
"desc": "Ophthalmology, Retina Specialist",
"state": "PA",
"license": "MD443007",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}
Other providers in Newport, VT
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 2, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.