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DR. WILLIAM JOSEPH FOSTER JR. M.D., PH.D.
NPI 1356390462
Ophthalmology - Retina Specialist in Montreal, QUEBEC

Active since May 08, 2006PECOS EnrolledAccepts Medicare Assignment
1100 AVENUE BEAUMONT, SUITE 305, MONTREAL, QUEBEC H3P 3 Get Directions Write a Review

NPPES record last updated: December 16, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 16, 2025, Mar 21, 2017, Feb 21, 2017 (3 updates tracked since 2017).

About Dr. William Joseph Foster Jr. M.d., Ph.d. NPPES

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

DR. WILLIAM JOSEPH FOSTER JR. M.D., PH.D. (NPI 1356390462) is an individual retina specialist in Montreal, QUEBEC, licensed in Vermont (042.0016623) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Newport, and is a graduate of Duke University School Of Medicine (1999).

NPPES Registry Identity

NPI1356390462
Entity TypeIndividualMale
Primary Taxonomy207WX0107X
Provider Legal NameDR. WILLIAM JOSEPH FOSTER JR.Credential: M.D., PH.D.
Location Address1100 AVENUE BEAUMONT, SUITE 305Montreal, QUEBEC H3P 3H5
Mailing Address2207 Concord Pike # 166Wilmington, DE 19803-2908 · (855) 250-3937 · Fax (855) 250-5500
Sole ProprietorNo
Medical School CMSDuke University School Of MedicineGraduated 1999
Enumeration DateMay 8, 2006
Last NPPES UpdateDecember 16, 20253 updates tracked since enumeration
NPPES CertifiedDecember 16, 2025
✔ NPI 1356390462 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOphthalmology · Retina SpecialistAllopathic & Osteopathic Physicians
Taxonomy Code207WX0107X
Licenses✔ Licensed in VT · 042.0016623✔ Licensed in MD · D72604✔ Licensed in PA · MD443007✔ Licensed in CA · A83251✔ Licensed in NY · 239580✔ Licensed in MI · 4301093303✔ Licensed in DE · C1-0009712
Definition
An ophthalmologist who specializes in the diagnosis and treatment of vitreoretinal diseases.
1100 AVENUE BEAUMONT, Montreal, QUEBEC H3P 3
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Secondary Practice Location 1

Location 15452 US-5, Suite HNewport, VT 05855 · Phone (855) 250-3937 · Fax (855) 250-5500

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. William Joseph Foster Jr. M.d., Ph.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9335100932
PECOS Enrollment IDI20260202000322
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show William Foster reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Retina And Vitreous Of Delaware Valley, PC
858 mi
Retina Specialist
5452 US ROUTE 5 STE H
Newport, VT 05855
  • Reassigned Medicare billing, Vermont enrollment
NPI 1093230500 (855) 250-3937

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 William Foster's NPI number?

The NPI number for William Foster is 1356390462. It was assigned to this individual provider in the NPPES registry on May 8, 2006.

Where is William Foster located?

William Foster practices at 1100 Avenue Beaumont Suite 305, Montreal, QUEBEC H3P 3.

What is William Foster's specialty?

The primary specialty registered for this NPI is Ophthalmology, specializing in Retina Specialist, with taxonomy code 207WX0107X.

Is William Foster enrolled in Medicare?

Yes. William Foster is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for William Foster's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Foster reassigns Medicare benefits to Retina And Vitreous Of Delaware Valley, PC (Newport, VT). The 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 William Foster's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Foster accept?

Health plans from Anthem Blue Cross and Blue Shield list William Foster as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for William Foster was last updated on December 16, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months 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.