Michael Ruddy, M.D.
NPI 1831138015 · Specialist · Princeton Junction, NJ
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Ruddy, M.D. is a Specialist provider in Princeton Junction, NJ (NPI 1831138015).
Provider details
- NPI number
- 1831138015
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- License
- MA31313 (NJ)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,137 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 353 | $18 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 332 | $198 |
| Collection and Interpretation of Physical Parameters Stored in Computers And/Or Transmitted By the Patient And/Or Caregiver to Qualified Health Care Professional, Requiring 30 Minutes Or More, Per 30 Days99091 | 214 | $58 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 182 | $139 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 19 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 37 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 291 | 85 |
| Chlorthalidone | 280 | 81 |
| Irbesartan | 148 | 47 |
| Atorvastatin Calcium | 146 | 42 |
| Bisoprolol Fumarate | 144 | 41 |
| Allopurinol | 113 | 34 |
| Losartan Potassium | 103 | 30 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$298 across 13 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
- 2006-06-05
- Last updated
- 2007-07-08
Frequently asked questions
- What is Michael Ruddy's NPI number?
- Michael Ruddy's National Provider Identifier (NPI) is 1831138015, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Ruddy's specialty?
- Michael Ruddy is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Michael Ruddy located?
- Michael Ruddy's practice location on file with NPPES is 88 Princeton Hightstown Rd, Princeton Junction, NJ 08550-1100.
- What is Michael Ruddy's phone number?
- The practice phone number listed in the NPPES registry for Michael Ruddy is (609) 750-7330.
- Does Michael Ruddy accept Medicare?
- Michael Ruddy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Ruddy's NPI active?
- Yes — Michael Ruddy's NPI (1831138015) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.