DR. WILLIAM N SCHREIBER MD
NPI 1366441826
Internal Medicine in Woodbridge, CT
About Dr. William N Schreiber Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM N SCHREIBER MD (NPI 1366441826) is an individual internal medicine provider in Woodbridge, Connecticut, licensed in Connecticut (023066) and active in the NPI registry since July 2005. He is enrolled in Medicare PECOS and is a graduate of State University Of New York At Buffalo School Of Medicine (1976).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 8
Accepted 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 N Schreiber Md 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.
Medicare Billing Reassignment
Medicare enrollment records show William Schreiber reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
New Haven, CT 06519
- Reassigned Medicare billing, Connecticut enrollment
- Medicare enrollment name: Northeast Medical Group Inc
- 1,824 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 11
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06525 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims 5
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WOODBRIDGE, CT 06525
WOODBRIDGE, CT 06525
WOODBRIDGE, CT 06525
WOODBRIDGE, CT 06525
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 Schreiber's NPI number?
The NPI number for William Schreiber is 1366441826. It was assigned to this individual provider in the NPPES registry on July 18, 2005.
Where is William Schreiber located?
William Schreiber practices at 1 Bradley Rd Suite 709, Woodbridge, CT 06525. The listed phone number is (203) 397-3950.
What is William Schreiber's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is William Schreiber enrolled in Medicare?
Yes. William Schreiber 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 Schreiber's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Schreiber reassigns Medicare benefits to Mill Hill Medical Consultants Inc (New Haven, CT). 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 Schreiber's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Schreiber accept?
Health plans from Anthem Blue Cross and Blue Shield list William Schreiber 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 Schreiber was last updated on October 17, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Dr. William N Schreiber, MD · NPI 1366441826
Internal Medicine physician in Woodbridge, Connecticut. Individual provider, active in the CMS NPPES registry since July 18, 2005.
## Identity
- **NPI:** 1366441826 (Entity type: Individual)
- **Enumerated:** July 18, 2005
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 023066 (Connecticut)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1 BRADLEY RD, SUITE 709, Woodbridge, CT 06525-2285
- **Phone:** (203) 397-3950
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Mill Hill Medical Consultants Inc (NPI 1891019675, New Haven, CT), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** State University Of New York At Buffalo School Of Medicine, class of 1976
## Record status
- **NPPES last updated:** October 17, 2011
- **Other identifiers:** Other 0Q2056 (CT); Medicare UPIN B16082 (CT); Other 2047266 (CT); and 5 more
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Source: [NPI Profile](https://npiprofile.com/npi/1366441826) · Data from the CMS NPPES public registry.