DR. MASON PETER LEEMAN-MARKOWSKI MD, PHD
NPI 1962666545
Psychiatry & Neurology - Vascular Neurology in Farmington, CT
About Dr. Mason Peter Leeman-markowski Md, Phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MASON PETER LEEMAN-MARKOWSKI MD, PHD (NPI 1962666545) is an individual vascular neurology provider in Farmington, Connecticut, licensed in Connecticut (061354) and active in the NPI registry since July 2008. He is enrolled in Medicare PECOS, maintains a secondary practice location in Stony Brook, and is a graduate of Other (1998).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Mason Peter Leeman-markowski Md, Phd is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Mason Leeman-markowski reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Farmington, CT 06030
- Reassigned Medicare billing, Connecticut enrollment
- 788 clinicians in this Medicare group
Bristol, CT 06010
- Reassigned Medicare billing, Connecticut enrollment
- 222 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 9
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06030 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FARMINGTON, CT 06030
FARMINGTON, CT 06030
FARMINGTON, CT 06030
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Mason Leeman-markowski's NPI number?
The NPI number for Mason Leeman-markowski is 1962666545. It was assigned to this individual provider in the NPPES registry on July 14, 2008.
Where is Mason Leeman-markowski located?
Mason Leeman-markowski practices at 263 Farmington Ave, Farmington, CT 06030. The listed phone number is (860) 679-4888.
What is Mason Leeman-markowski's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Vascular Neurology, with taxonomy code 2084V0102X.
Is Mason Leeman-markowski enrolled in Medicare?
Yes. Mason Leeman-markowski is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Mason Leeman-markowski's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mason Leeman-markowski reassigns Medicare benefits to 2 organizations: University Of Connecticut Health Center (Farmington, CT) and Bristol Hospital Multi Specialty Group, Inc (Bristol, CT). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mason Leeman-markowski's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mason Leeman-markowski accept?
Health plans from Anthem Blue Cross and Blue Shield list Mason Leeman-markowski as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Mason Leeman-markowski was last updated on September 30, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Mason Peter Leeman-Markowski, MD, PHD · NPI 1962666545
Vascular Neurology physician in Farmington, Connecticut. Individual provider, active in the CMS NPPES registry since July 14, 2008.
## Identity
- **NPI:** 1962666545 (Entity type: Individual)
- **Enumerated:** July 14, 2008
- **Primary specialty:** Psychiatry & Neurology - Vascular Neurology · taxonomy 2084V0102X
- **State license:** 061354 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 263 FARMINGTON AVE, Farmington, CT 06030-0001
- **Phone:** (860) 679-4888 · **Fax:** (860) 679-0131
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): University Of Connecticut Health Center (NPI 1720083769, Farmington, CT); Bristol Hospital Multi Specialty Group, Inc (NPI 1649265679, Bristol, CT) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1998
## Record status
- **NPPES last updated:** September 30, 2022
---
Source: [NPI Profile](https://npiprofile.com/npi/1962666545) · Data from the CMS NPPES public registry.