NPI registry status
Active
2026 NPPES data Clinical Neurophysiology Physician NPI 1962666545 MD, PHD
Verify on CMS → Mason Leeman-Markowski, MD, PHD
Clinical Neurophysiology Physician in Farmington, Connecticut.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 639 in Clinical Neurophysiology 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
387
Medicare Part D claims · 91 beneficiaries · Clinical Neurophysiology Physician avg: 2K
MIPS score
79.3/100
▼ 4 pts below national avg 83.1 · Above neutral
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Mason Leeman-Markowski, MD, PHD reported a CMS MIPS final score of 79.3/100 - below the 83.1 national average - and filed 387 Medicare Part D claims in 2023.
- 79.3/100
- MIPS score · -4 vs avg
- 387
- Part D claims, 2023
- 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.
Mason Leeman-Markowski, MD, PHD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
79 30th percentile higher than 30% of 477,587 scored providers
Each bar is a band; taller bars hold more scored 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.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Mason Leeman-Markowski, MD, PHD sits
This provider among clinical neurophysiology physician peers
Across the 187 clinical neurophysiology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Mason Leeman-Markowski, MD, PHD writes more Part D claims than 27% of them and scores higher on MIPS quality than 36% - placing this provider in the lower-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one clinical neurophysiology physician peer from a representative sample of 60; the gold marker is Mason Leeman-Markowski, MD, PHD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Mason Leeman-Markowski, MD, PHD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 2 hospital affiliations - 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 Mason Leeman-Markowski, MD, PHD?
Near national averagePrimary specialty
Clinical Neurophysiology Physician
Medicare Part D claims
387 75% vs specialty avg
MIPS final score
79.3/100 3.8 pts vs avg
Specialty distribution in Connecticut
How Clinical Neurophysiology Physician compares to other specialties among Connecticut providers
Medicare quality performance, MIPS
Mason Leeman-Markowski, MD, PHD's 2023 MIPS final score plotted against the Clinical Neurophysiology Physician national average
- MIPS Final Score
- 79.3/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Clinical Neurophysiology Physician) - 79.3/100 vs national avg 83.1
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).
Mason Leeman-Markowski, MD, PHD appears in the CMS NPPES registry as a Clinical Neurophysiology Physician provider holding MD, PHD credentials at 263 FARMINGTON AVE, Farmington, CT, 06030, with a listed phone of (860) 679-4888. NPI 1962666545 was issued on 07/14/2008.
Medicare Part D records for calendar year 2023 show 387 prescription claims written by this provider, covering 91 Medicare beneficiaries and totaling roughly $52K in drug spend. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 79.3/100 for the 2023 performance year (Quality 69.2, Cost 48.1), compared with the national average of 83.1.
Clinical Neurophysiology Physician is a narrow specialty nationwide, with 639 enrolled providers across 50 states and an average of 1,523 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 | 1962666545 |
|---|---|
| Specialty | Clinical Neurophysiology Physician |
| Credentials | MD, PHD |
| Gender | Male |
| NPI Issued | 07/14/2008 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
79.3496
Final Score
Avg: 83.1
69.2231
Quality
48.0871
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Mason Leeman-Markowski, MD, PHD 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.
Bristol Hospital Multi Specialty Group, Inc.
Bristol, CT
University OF Connecticut Health Center
Farmington, CT
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
387
Total Claims
$52K
Total Drug Cost
91
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 753
- Total Day Supply
- 22,151
- Generic Drug Cost
- $32K
Patient Demographics
- Average Patient Age
- 67.4 years
- Avg HCC Risk Score
- 1.92
- Gender Split
- 51% female / 49% male
- Age Distribution
- <65: 25, 65-74: 35, 75-84: 20, 85+: 11
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mason Leeman-Markowski, MD, PHD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levetiracetam
Levetiracetam
88 claims
- Atorvastatin Calcium
Atorvastatin Calcium
36 claims
- Topiramate 27
Topiramate
27 claims
- Divalproex Sodium Er 22
Divalproex Sodium Er
22 claims
- Gabapentin 21
Gabapentin
21 claims
- Clobazam 20
Clobazam
20 claims
- Phenytoin Sodium E… 17
Phenytoin Sodium Extended
17 claims
- Eliquis 15
Eliquis
15 claims
| Drug | Claims |
|---|---|
| Levetiracetam | 88 |
| Atorvastatin Calcium | 36 |
| Topiramate | 27 |
| Divalproex Sodium Er Divalproex Sodium | 22 |
| Gabapentin | 21 |
| Clobazam | 20 |
| Phenytoin Sodium Extended | 17 |
| Eliquis Apixaban | 15 |
| Oxcarbazepine | 15 |
| Divalproex Sodium | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Clinical Neurophysiology Physician in CT →
All providers in Connecticut →
Compare specialties →
Clinical Neurophysiology Physician Overview
How Mason Leeman-Markowski, MD, PHD fits within the Clinical Neurophysiology Physician landscape nationally.
639
Clinical Neurophysiology Physician Providers in US
50
States with Clinical Neurophysiology Physician
1,523
Avg Claims per Provider
Mason Leeman-Markowski, MD, PHD's 387 claims are below the specialty average of 1,523.
Nearby Clinical Neurophysiology Physician Providers in Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Leeman-Markowski.
Dr. Hamada Altalib
D.O.,M.P.H.
West Haven, CT
Dr. Charles Guardia
M.D.
Danbury, CT
Dr. Joseph Haddad
DHSC
Glastonbury, CT
Dr. Mayer Hasbani
MD
New Haven, CT
Dr. Moshe Hasbani
MD
New Haven, CT
Compare Clinical Neurophysiology 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 Connecticut medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Clinical Neurophysiology 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 Mason Leeman-Markowski, MD, PHD's specialty? ▼
Mason Leeman-Markowski, MD, PHD specializes in Clinical Neurophysiology Physician and practices in Farmington, Connecticut. Credentials: MD, PHD.
How much does Mason Leeman-Markowski, MD, PHD prescribe under Medicare Part D? ▼
In 2023, Mason Leeman-Markowski, MD, PHD wrote 387 Medicare Part D claims totaling $52K in drug costs for 91 beneficiaries.
What is Mason Leeman-Markowski, MD, PHD's Medicare quality score? ▼
Mason Leeman-Markowski, MD, PHD has a CMS MIPS Final Score of 79.3/100 (Quality: 69.2, Cost: 48.1). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Mason Leeman-Markowski, MD, PHD located? ▼
Mason Leeman-Markowski, MD, PHD is located at 263 FARMINGTON AVE, Farmington, CT, 06030. Phone: (860) 679-4888.
What is Mason Leeman-Markowski, MD, PHD's NPI number? ▼
Mason Leeman-Markowski, MD, PHD's National Provider Identifier (NPI) is 1962666545, issued on 07/14/2008.
How many Clinical Neurophysiology Physician providers are there in the US? ▼
There are 639 Clinical Neurophysiology Physician providers across 50 states in the US. The average Clinical Neurophysiology Physician provider writes 1,523 Medicare Part D claims per year.
What drugs does Mason Leeman-Markowski, MD, PHD prescribe most often? ▼
Based on 2023 Medicare Part D data, Mason Leeman-Markowski, MD, PHD's most frequently prescribed drugs include Levetiracetam, Atorvastatin Calcium, Topiramate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mason Leeman-Markowski, MD, PHD accept Medicare? ▼
Mason Leeman-Markowski, MD, PHD appears in CMS Medicare data with 387 Part D claims and 91 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mason Leeman-Markowski, MD, PHD's credentials? ▼
Mason Leeman-Markowski, MD, PHD's NPI is 1962666545 with credentials MD, PHD. 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
Compiled from official public sources by the PlainDoctor editorial team.