KATHERINE RUDDY MD
NPI 1447887955
Internal Medicine - Rheumatology in Summit, NJ
About Katherine Ruddy Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KATHERINE RUDDY MD (NPI 1447887955) is an individual rheumatology provider in Summit, New Jersey, licensed in New Jersey (25MA12731700) and active in the NPI registry since March 2020. She is enrolled in Medicare PECOS, is affiliated with Hunterdon Medical Center, and is a graduate of Columbia University College Of Physicians And Surgeons (2020).
NPPES Registry Identity
Specialties & Licenses
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
Katherine Ruddy 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 Katherine Ruddy reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Morristown, NJ 07960
- Reassigned Medicare billing, New Jersey enrollment
- 1,699 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.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Hunterdon Medical Center
Acute Care Hospitals · Flemington, NJMorristown Medical Center
Acute Care Hospitals · Morristown, NJOverlook Medical Center
Acute Care Hospitals · Summit, NJPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 07901 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 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Katherine Ruddy's NPI number?
The NPI number for Katherine Ruddy is 1447887955. It was assigned to this individual provider in the NPPES registry on March 25, 2020.
Where is Katherine Ruddy located?
Katherine Ruddy practices at 33 Overlook Rd Ste L01, Summit, NJ 07901. The listed phone number is (908) 598-7940.
What is Katherine Ruddy's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.
Is Katherine Ruddy enrolled in Medicare?
Yes. Katherine Ruddy 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 Katherine Ruddy's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Katherine Ruddy reassigns Medicare benefits to Practice Associates Medical Group (Morristown, NJ). 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 Katherine Ruddy's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Katherine Ruddy accept?
Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list Katherine Ruddy 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.
Is Katherine Ruddy affiliated with any hospitals?
According to CMS data, Katherine Ruddy is affiliated with Hunterdon Medical Center, Morristown Medical Center and Overlook Medical Center.
When was this NPI record last updated?
The NPPES record for Katherine Ruddy was last updated on August 22, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Katherine Ruddy, MD · NPI 1447887955
Rheumatology physician in Summit, New Jersey. Individual provider, active in the CMS NPPES registry since March 25, 2020.
## Identity
- **NPI:** 1447887955 (Entity type: Individual)
- **Enumerated:** March 25, 2020
- **Primary specialty:** Internal Medicine - Rheumatology · taxonomy 207RR0500X
- **State license:** 25MA12731700 (New Jersey)
- **Sole proprietor:** No
## Practice location
- **Address:** 33 OVERLOOK RD STE L01, Summit, NJ 07901-3561
- **Phone:** (908) 598-7940 · **Fax:** (908) 598-5447
## 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:** Practice Associates Medical Group (NPI 1427016385, Morristown, NJ), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Columbia University College Of Physicians And Surgeons, class of 2020
## Record status
- **NPPES last updated:** August 22, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1447887955) · Data from the CMS NPPES public registry.