Mason Leeman-Markowski, MD, PHD
NPI 1962666545 · Vascular Neurology Physician · Farmington, CT
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mason Leeman-Markowski, MD, PHD is a Vascular Neurology Physician provider in Farmington, CT (NPI 1962666545).
Provider details
- NPI number
- 1962666545
- Entity type
- Individual
- Primary specialty
- Vascular Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 60-275372 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
212 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 52 | $188 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 41 | $173 |
| Measurement of Brain Wave Activity With Video (veeg), 12-26 Hours With Review and Report By Health Care Professional95720 | 22 | $211 |
| Prolonged Office Or Other Outpatient Evaluation and Management Service(s) Beyond the Maximum Required Time of the Primary Procedure Which Has Been Selected Using Total Time on the Date of the Primary Service; Each Additional 15 Minutes By the Physician OrG2212 | 21 | $34 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 18 | $95 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levetiracetam | 123 | 38 |
| Lacosamide | 56 | — |
| Atorvastatin Calcium | 56 | 20 |
| Topiramate | 36 | — |
| Apixabanbrand: Eliquis | 28 | — |
| Divalproex Sodiumbrand: Divalproex Sodium Er | 27 | — |
| Clopidogrel Bisulfatebrand: Clopidogrel |
Practice location
Mailing address
Additional practice locations (1)
- Hsc T12-020Stony Brook UniversityStony Brook, NY 11794-0001Phone: (202) 687-2184
Registry dates
- Enumerated
- 2008-07-14
- Last updated
- 2022-09-30
Frequently asked questions
- What is Mason Leeman-Markowski's NPI number?
- Mason Leeman-Markowski's National Provider Identifier (NPI) is 1962666545, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mason Leeman-Markowski's specialty?
- Mason Leeman-Markowski is listed in the NPPES registry with a primary specialty of Vascular Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Mason Leeman-Markowski located?
- Mason Leeman-Markowski's practice location on file with NPPES is 263 Farmington Ave, Farmington, CT 06030-0001.
- What is Mason Leeman-Markowski's phone number?
- The practice phone number listed in the NPPES registry for Mason Leeman-Markowski is (860) 679-4888.
- Does Mason Leeman-Markowski accept Medicare?
- Mason Leeman-Markowski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mason Leeman-Markowski's NPI active?
- Yes — Mason Leeman-Markowski's NPI (1962666545) is active in the NPPES registry as of the last update on 2022-09-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.