NPI registry status
Active
2026 NPPES data Nuclear Cardiology Physician NPI 1679506208 M.D.
Verify on CMS → Michael Ruder, M.D.
Nuclear Cardiology Physician in E Palo Alto, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 374 in Nuclear Cardiology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
729
Medicare Part D claims · 210 beneficiaries · Nuclear Cardiology Physician avg: 4K
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Michael Ruder, M.D. filed 729 Medicare Part D claims in 2023 as a Nuclear Cardiology Physician in E Palo Alto, California, prescribing 86% generic.
- 729
- Part D claims, 2023
- 86%
- generic prescribing
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Michael Ruder, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
729 Top 29% higher than 71% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Michael Ruder, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Michael Ruder, M.D.?
Quality data not reportedPrimary specialty
Nuclear Cardiology Physician
Medicare Part D claims
729 82% vs specialty avg
Specialty distribution in California
How Nuclear Cardiology Physician compares to other specialties among California providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Nuclear Cardiology Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Michael Ruder, M.D. appears in the CMS NPPES registry as a Nuclear Cardiology Physician provider holding M.D. credentials at 1950 UNIVERSITY AVE, E Palo Alto, CA, 94303, with a listed phone of (650) 617-8100. NPI 1679506208 was issued on 07/08/2006.
Medicare Part D records for calendar year 2023 show 729 prescription claims written by this provider, covering 210 Medicare beneficiaries and totaling roughly $147K in drug spend, split 14% brand-name and 86% generic by claim count.
Nuclear Cardiology Physician is a narrow specialty nationwide, with 374 enrolled providers across 37 states and an average of 4,019 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1679506208 |
|---|---|
| Specialty | Nuclear Cardiology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/08/2006 |
License & disciplinary context - California MBC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Michael Ruder, M.D.. To verify Michael Ruder, M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Michael Ruder, M.D. - brand share 14.0%
Nuclear Cardiology Physician average
14% brand-name claims vs 86% generic, on 729 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
729
Total Claims
$147K
Total Drug Cost
210
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,997
- Total Day Supply
- 59,651
- Brand vs Generic
- 14% brand / 86% generic
- Brand Drug Cost
- $126K
- Generic Drug Cost
- $22K
Patient Demographics
- Average Patient Age
- 80.4 years
- Avg HCC Risk Score
- 1.45
- Gender Split
- 50% female / 50% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Michael Ruder, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
72 claims
- Metoprolol Succinate
Metoprolol Succinate
62 claims
- Eliquis
Eliquis
49 claims
- Amlodipine Besylate
Amlodipine Besylate
42 claims
- Carvedilol
Carvedilol
37 claims
- Xarelto
Xarelto
29 claims
- Diltiazem 24hr Er … 25
Diltiazem 24hr Er (Cd)
25 claims
- Losartan Potassium 24
Losartan Potassium
24 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 72 |
| Metoprolol Succinate | 62 |
| Eliquis Apixaban | 49 |
| Amlodipine Besylate | 42 |
| Carvedilol | 37 |
| Xarelto Rivaroxaban | 29 |
| Diltiazem 24hr Er (Cd) Diltiazem Hcl | 25 |
| Losartan Potassium | 24 |
| Furosemide | 22 |
| Nebivolol Hcl | 22 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nuclear Cardiology Physician Overview
How Michael Ruder, M.D. fits within the Nuclear Cardiology Physician landscape nationally.
374
Nuclear Cardiology Physician Providers in US
37
States with Nuclear Cardiology Physician
4,019
Avg Claims per Provider
Michael Ruder, M.D.'s 729 claims are below the specialty average of 4,019.
Nearby Nuclear Cardiology Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Ruder.
Dr. Riaz Ahmed
M.D.
Encinitas, CA
Dr. Siva Arunasalam
M D
Victorville, CA
Dr. Shadfar Bahri
M.D.
Los Angeles, CA
Dr. Leslie Baluyot
MD
Modesto, CA
Dr. Raye Bellinger
MD
Sacramento, CA
Compare Nuclear Cardiology Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Nuclear Cardiology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Michael Ruder, M.D.'s specialty? ▼
Michael Ruder, M.D. specializes in Nuclear Cardiology Physician and practices in E Palo Alto, California. Credentials: M.D..
How much does Michael Ruder, M.D. prescribe under Medicare Part D? ▼
In 2023, Michael Ruder, M.D. wrote 729 Medicare Part D claims totaling $147K in drug costs for 210 beneficiaries.
Where is Michael Ruder, M.D. located? ▼
Michael Ruder, M.D. is located at 1950 UNIVERSITY AVE, E Palo Alto, CA, 94303. Phone: (650) 617-8100.
What is Michael Ruder, M.D.'s NPI number? ▼
Michael Ruder, M.D.'s National Provider Identifier (NPI) is 1679506208, issued on 07/08/2006.
Does Michael Ruder, M.D. prescribe more brand-name or generic drugs? ▼
Michael Ruder, M.D.'s prescribing is 14% brand-name and 86% generic drugs by claim count, with $126K in brand drug costs.
How many Nuclear Cardiology Physician providers are there in the US? ▼
There are 374 Nuclear Cardiology Physician providers across 37 states in the US. The average Nuclear Cardiology Physician provider writes 4,019 Medicare Part D claims per year.
What drugs does Michael Ruder, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Michael Ruder, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Metoprolol Succinate, Eliquis. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Michael Ruder, M.D. accept Medicare? ▼
Michael Ruder, M.D. appears in CMS Medicare data with 729 Part D claims and 210 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michael Ruder, M.D.'s credentials? ▼
Michael Ruder, M.D.'s NPI is 1679506208 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.