NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1134200058 M.D.
Verify on CMS → Ron Kastner, M.D.
Internal Medicine Physician in Plainview, New York.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,737 in Internal Medicine 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
5K
Medicare Part D claims · 542 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
90%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
84.1/100
▲ 1 pts above national avg 83.5 · Above neutral
Industry payments
$685.67
31 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Ron Kastner, M.D. reported a CMS MIPS final score of 84.1/100 - above the 83.5 national average - and filed 5,427 Medicare Part D claims in 2023.
- 84.1/100
- MIPS score · +1 vs avg
- 5K
- Part D claims, 2023
- 90%
- generic prescribing
- Likely
- board-certified (heuristic)
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.
Ron Kastner, M.D.'s MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
84 ≥ 42nd percentile 42% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Ron Kastner, M.D. sits
This provider among internal medicine physician peers
Across the 34,612 internal medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Ron Kastner, M.D. writes more Part D claims than 83% of them and scores higher on MIPS quality than 41% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one internal medicine physician peer from a representative sample of 60; the gold marker is Ron Kastner, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Ron Kastner, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Ron Kastner, M.D.?
Near national averagePrimary specialty
Internal Medicine Physician
Medicare Part D claims
5,427 100% vs specialty avg
MIPS final score
84.1/100 0.6 pts vs avg
Specialty distribution in New York
How Internal Medicine Physician compares to other specialties among New York providers
Medicare quality performance, MIPS
Ron Kastner, M.D.'s 2023 MIPS final score plotted against the Internal Medicine Physician national average
- MIPS Final Score
- 84.1/100
- vs 83.5 national avg · 2023 performance year
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).
Ron Kastner, M.D. appears in the CMS NPPES registry as an Internal Medicine Physician provider holding M.D. credentials at 789 OLD COUNTRY RD, Plainview, NY, 11803, with a listed phone of (516) 433-3600. NPI 1134200058 was issued on 10/18/2006.
Medicare Part D records for calendar year 2023 show 5,427 prescription claims written by this provider, covering 542 Medicare beneficiaries and totaling roughly $379K in drug spend, split 9% brand-name and 90% generic by claim count, with an opioid prescribing rate of 0.9%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 84.1/100 for the 2023 performance year (Quality 78.1, Cost 69.1), compared with the 83.5 average among clinicians with a measured score.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,737 enrolled providers across 56 states and an average of 2,716 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 | 1134200058 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 10/18/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
84.1496
Final Score
Measured-score avg: 83.5
78.1119
Quality
69.0533
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Ron Kastner, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Optum Medical Care PC
Mount Kisco, NY
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Ron Kastner, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$686
Largest payer
Novo Nordisk Inc
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - New York NYSBPMC 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 ~100K New York medical licensees in 2023 - they are NOT specific to Ron Kastner, M.D.. To verify Ron Kastner, M.D.'s current license status, search the NYSBPMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
312
Total board actions, New York 2023
Across 302 cases
3.12
Actions per 1,000 licensees
New York statewide rate
probation
Most common action type
89 cases
NYSBPMC 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 New York disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Ron Kastner, M.D. - brand share 9.0%
Internal Medicine Physician average
9% brand-name claims vs 90% generic, on 5,427 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.
5,427
Total Claims
$379K
Total Drug Cost
542
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 13,087
- Total Day Supply
- 385,320
- Brand vs Generic
- 9% brand / 90% generic
- Brand Drug Cost
- $292K
- Generic Drug Cost
- $86K
- Opioid Claims
- 51 (0.9% rate)
- Antibiotic Claims
- 150
Patient Demographics
- Average Patient Age
- 76.7 years
- Avg HCC Risk Score
- 1.04
- Gender Split
- 51% female / 49% male
- Age Distribution
- <65: 17, 65-74: 234, 75-84: 167, 85+: 124
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Ron Kastner, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
415 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
346 claims
- Amlodipine Besylate
Amlodipine Besylate
298 claims
- Levothyroxine Sodium
Levothyroxine Sodium
283 claims
- Losartan Potassium
Losartan Potassium
184 claims
- Metoprolol Succinate
Metoprolol Succinate
183 claims
- Pravastatin Sodium
Pravastatin Sodium
166 claims
- Simvastatin 159
Simvastatin
159 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 415 |
| Rosuvastatin Calcium | 346 |
| Amlodipine Besylate | 298 |
| Levothyroxine Sodium | 283 |
| Losartan Potassium | 184 |
| Metoprolol Succinate | 183 |
| Pravastatin Sodium | 166 |
| Simvastatin | 159 |
| Pantoprazole Sodium | 156 |
| Sertraline Hcl | 139 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How Ron Kastner, M.D. fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Ron Kastner, M.D.'s 5,427 claims are above the specialty average of 2,716.
Nationwide Internal Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Kastner, both outside New York so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (84.1 here).
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Internal Medicine Physician Providers in New York
Other clinicians with the same primary specialty enrolled in New York, drawn from the same CMS NPPES roster as Kastner.
One of 13,660 Internal Medicine Physician providers enrolled in New York, 5 are shown here.
Dr. Deborah Aanonsen
D.O.
Staten Island, NY
Dr. Nivedita Aanur
M.D.
New York, NY
Dr. Jay Aaron
MD
Great Neck, NY
Dr. Justin Aaron
MD
New York, NY
Ahmad Abadi
Poughkeepsie, NY
Compare Internal Medicine 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 New York medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Internal Medicine 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 Ron Kastner, M.D.'s specialty? ▼
Ron Kastner, M.D. specializes in Internal Medicine Physician and practices in Plainview, New York. Credentials: M.D..
How much does Ron Kastner, M.D. prescribe under Medicare Part D? ▼
In 2023, Ron Kastner, M.D. wrote 5,427 Medicare Part D claims totaling $379K in drug costs for 542 beneficiaries.
What is Ron Kastner, M.D.'s Medicare quality score? ▼
Ron Kastner, M.D. has a CMS MIPS Final Score of 84.1/100 (Quality: 78.1, Cost: 69.1). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Ron Kastner, M.D. located? ▼
Ron Kastner, M.D. is located at 789 OLD COUNTRY RD, Plainview, NY, 11803. Phone: (516) 433-3600.
What is Ron Kastner, M.D.'s NPI number? ▼
Ron Kastner, M.D.'s National Provider Identifier (NPI) is 1134200058, issued on 10/18/2006.
Does Ron Kastner, M.D. prescribe more brand-name or generic drugs? ▼
Ron Kastner, M.D.'s prescribing is 9% brand-name and 90% generic drugs by claim count, with $292K in brand drug costs.
Does Ron Kastner, M.D. prescribe opioids? ▼
Yes, Ron Kastner, M.D. had 51 opioid claims in 2023 with an opioid prescribing rate of 0.9%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does Ron Kastner, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Ron Kastner, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Rosuvastatin Calcium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ron Kastner, M.D. accept Medicare? ▼
Ron Kastner, M.D. appears in CMS Medicare data with 5,427 Part D claims and 542 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ron Kastner, M.D.'s credentials? ▼
Ron Kastner, M.D.'s NPI is 1134200058 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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
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.