Katherine Ruddy, MD
Rheumatology Physician · Summit, NJ
Katherine Ruddy, MD is a rheumatology physician with a practice address in Summit, New Jersey, and NPI 1447887955, issued on Mar 25, 2020. Check the license (New Jersey 25MA12731700, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Katherine Ruddy
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 25MA12731700 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 33 Overlook RD Ste L01, Summit, NJ 07901
- Phone
- (908) 598-7940
- Enumerated
- Mar 25, 2020
- Record last updated
- Aug 22, 2025
- Fax
- (908) 598-5447
- Medicare enrollment
- Enrolled (PECOS I20250918000104); accepts Medicare assignment
- Medical or professional school
- Columbia University College Of Physicians And Surgeons, 2020
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 253 in New Jersey → Look up another NPI →
Also registered at 33 Overlook RD Ste L01
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Krissy Choi, DORheumatology Physician1871864371
- Arathi Setty, MD, MPHRheumatology Physician1528035938
Verify Katherine Ruddy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license 25MA12731700Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average rheumatology physician in 2024
391 Medicare Part D claims for 70 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Methotrexate41 claims
- Gabapentin32 claims
- Hydroxychloroquine Sulfate30 claims
- Prednisone29 claims
- Diclofenac Sodium15 claims
- Duloxetine Hcl15 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $154.88
7 payments; by number, the most common kind was food and beverage; the largest payer was Aurinia Pharma U.S., Inc. The 4,486 providers of this specialty with any payment received $8,538.33 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Practice Associates Medical GroupSummit, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine Ruddy among 253 rheumatology physician records in New Jersey
Katherine Ruddy, MD is one of 253 rheumatology physician records with a practice address in New Jersey. 86% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 94% of them.
- NPI issued2020 · 94% of these records are older, 3% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated2020 · median 2003 among the 190 with a school on file
- Record last updated2025 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in New Jersey
There are 253 rheumatology physician records in New Jersey.
All 253 in New Jersey → Every provider in Summit → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Krissy Choi, DOSummit, NJ 079011871864371
- Jeffrey Greenberg, MDSummit, NJ 079011982783981
- Neil Kramer, MDSummit, NJ 079011306808746
- Sheetal Patel, M.D.Summit, NJ 079011316258122
- Elliot Rosenstein, M.D.Summit, NJ 079011174585145
- Arathi Setty, MD, MPHSummit, NJ 079011528035938
- John Sharkey, MDSummit, NJ 079011477131571
- Andrea Gaito, MDBasking Ridge, NJ 079201487781787
Common questions
What is Katherine Ruddy, MD's NPI number?
Katherine Ruddy, MD's National Provider Identifier (NPI) is 1447887955, issued on Mar 25, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Ruddy, MD located?
The NPPES record lists a practice address at 33 Overlook RD Ste L01, Summit, NJ, 07901. Phone: (908) 598-7940. Providers update this record themselves, so call before visiting.
How can I verify Katherine Ruddy, MD's license?
NPPES lists New Jersey license number 25MA12731700, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Katherine Ruddy, MD prescribe under Medicare Part D?
In 2024, Katherine Ruddy, MD had 391 Medicare Part D claims for 70 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.