DR. WILLIAM E ROSNER M.D.
NPI 1114961083
Internal Medicine in West Haven, CT
About Dr. William E Rosner M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM E ROSNER M.D. (NPI 1114961083) is an individual internal medicine provider in West Haven, Connecticut, licensed in Connecticut (21674) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. William E Rosner M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show William Rosner reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
West Haven, CT 06516
- Reassigned Medicare billing, Connecticut enrollment
- 21 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06516 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.
Reported Quality Measures
Other Providers at the Same Location NPPES 10
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WEST HAVEN, CT 06516
WEST HAVEN, CT 06516
WEST HAVEN, CT 06516
WEST HAVEN, CT 06516
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 Rosner's NPI number?
The NPI number for William Rosner is 1114961083. It was assigned to this individual provider in the NPPES registry on June 15, 2006.
Where is William Rosner located?
William Rosner practices at 755 Campbell Ave, West Haven, CT 06516. The listed phone number is (203) 931-2828.
What is William Rosner's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is William Rosner enrolled in Medicare?
Yes. William Rosner is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for William Rosner's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Rosner reassigns Medicare benefits to Campbell Medical Services, LLC (West 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 Rosner's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for William Rosner was last updated on March 13, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.