Katherine Ruddy, MD
NPI 1447887955 · Rheumatology Physician · Summit, NJ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Ruddy, MD is a Rheumatology Physician provider in Summit, NJ (NPI 1447887955).
Provider details
- NPI number
- 1447887955
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 25MA12731700 (NJ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
6 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Methotrexate Sodiumbrand: Methotrexate | 41 | 14 |
| Gabapentin | 32 | — |
| Hydroxychloroquine Sulfate | 30 | 13 |
| Prednisone | 29 | 11 |
| Duloxetine Hcl | 15 | — |
| Diclofenac Sodium | 15 | — |
| Etanerceptbrand: Enbrel Sureclick |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$155 across 7 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-03-25
- Last updated
- 2025-08-22
- Certified
- 2025-08-22
Frequently asked questions
- What is Katherine Ruddy's NPI number?
- Katherine Ruddy's National Provider Identifier (NPI) is 1447887955, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Ruddy's specialty?
- Katherine Ruddy is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Katherine Ruddy located?
- Katherine Ruddy's practice location on file with NPPES is 33 Overlook Rd Ste L01, Summit, NJ 07901-3561.
- What is Katherine Ruddy's phone number?
- The practice phone number listed in the NPPES registry for Katherine Ruddy is (908) 598-7940.
- Does Katherine Ruddy accept Medicare?
- Katherine Ruddy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Ruddy's NPI active?
- Yes — Katherine Ruddy's NPI (1447887955) is active in the NPPES registry as of the last update on 2025-08-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.