DR. RUTH ELLEN WEISSBERGER MD
NPI 1255365326
Internal Medicine in New Haven, CT
About Dr. Ruth Ellen Weissberger Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. RUTH ELLEN WEISSBERGER MD (NPI 1255365326) is an individual internal medicine provider in New Haven, Connecticut, licensed in Connecticut (033172) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Ruth Ellen Weissberger Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Ruth Weissberger reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Waterbury, CT 06702
- Reassigned Medicare billing, Connecticut enrollment
- 97 clinicians in this Medicare group
Manchester, CT 06040
- Reassigned Medicare billing, Connecticut enrollment
- 422 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
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 06511 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
NEW HAVEN, CT 06511
NEW HAVEN, CT 06511
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 Ruth Weissberger's NPI number?
The NPI number for Ruth Weissberger is 1255365326. It was assigned to this individual provider in the NPPES registry on July 11, 2006.
Where is Ruth Weissberger located?
Ruth Weissberger practices at 1450 Chapel St, New Haven, CT 06511. The listed phone number is (203) 789-3203.
What is Ruth Weissberger's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Ruth Weissberger enrolled in Medicare?
Yes. Ruth Weissberger is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Ruth Weissberger's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ruth Weissberger reassigns Medicare benefits to 2 organizations: Staywell Health Care, Inc. (Waterbury, CT) and Prospect Ct Medical Foundation, Inc. (Manchester, CT). Each 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 Ruth Weissberger'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 Ruth Weissberger was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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. Ruth Ellen Weissberger, MD · NPI 1255365326
Internal Medicine physician in New Haven, Connecticut. Individual provider, active in the CMS NPPES registry since July 11, 2006.
## Identity
- **NPI:** 1255365326 (Entity type: Individual)
- **Enumerated:** July 11, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 033172 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 1450 CHAPEL ST, New Haven, CT 06511
- **Phone:** (203) 789-3203 · **Fax:** (203) 789-3222
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Staywell Health Care, Inc. (NPI 1154342335, Waterbury, CT); Prospect Ct Medical Foundation, Inc. (NPI 1144677568, Manchester, CT) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 8, 2007
- **Other identifiers:** Medicare UPIN F26198
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Source: [NPI Profile](https://npiprofile.com/npi/1255365326) · Data from the CMS NPPES public registry.