DR. MASON PETER LEEMAN-MARKOWSKI (MD, PHD) – Vascular Neurology Physician, NPI 1962666545
Vascular Neurology Physician
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Profile Insights
NPPES metrics only — not quality of care.
509 NEUROLOGY in CT
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Provider Addresses for DR. MASON PETER LEEMAN-MARKOWSKI (MD, PHD)
University of Connecticut Health Center, 263, Farmington Avenue, Farmington, Hartford County, Connecticut, 06030, United States
FARMINGTON, CT 06030
Phone: (860) 679-4888
Fax: (860) 679-0131
Type: Location
Hsc T12-020
Stony Brook University
Stony Brook, NY 117940001
Phone: (202) 687-2184
Type: Location
263 FARMINGTON AVE
FARMINGTON, CT 060300001
Phone: (860) 679-4888
Fax: (860) 679-0131
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2018-11-01
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20181101002633 | I | Neurology | CT | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 51 | 45 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 31 | 29 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 21 | 19 | $0 |
| 99442 | Telephone medical discussion with physician, 11-20 minutes | 18 | 16 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 18 | 14 | $0 |
Insurance plans in this area (ZIP 06030)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | CT | |
| - | CT | |
| Orthopedic Surgery | MA | |
| Sleep Medicine | CT | |
| - | CT | |
| Physician Assistant | CT | |
| Nurse Practitioner | CT | |
| - | CT | |
| P S Y C H I A T R Y | CT | |
| Internal Medicine | NY |
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