Jon Tessler
Pharmacist • New Haven, CT
Notice of NPI Deactivation & Inactive Practice Status
According to official public domain records published by CMS (Centers for Medicare & Medicaid Services) in the National Provider Identifier (NPPES) Registry, Jon Tessler has officially deactivated this NPI record and ceased active healthcare practice.
Professional Overview & Biography Verified Profile Summary
Jon Tessler was a registered Pharmacist practicing in New Haven, CT. Throughout an active medical career spanning 7 years, Jon Tessler provided care at the practice location at 20 YORK ST until profile deactivation on 2026-01-22.
Practice Location & Contact Primary Location
20 York St
New Haven, CT 065103220
Specialty Benchmarks & Practice Insights
Comparative analytics for Pharmacist in New Haven, CT
Practicing in New Haven, CT (3300 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Medical Specialties & State Licenses
NUCC Taxonomy Code: 183500000X
An individual licensed by the appropriate state regulatory agency to engage in the practice of pharmacy. The practice of pharmacy includes, but is not limited to, assessment, interpretation, evaluation, and implementation, initiation, monitoring or modification of medication and or medical orders; the compounding or dispensing of medication and or medical orders; participation in drug and device procurement, storage, and selection; drug administration; drug regimen reviews; drug or drug-related research; provision of patient education and the provision of those acts or services necessary to provide medication therapy management services in all areas of patient care.
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Pharmacist - Oncology
Pharmacist - Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist
Pharmacist - Oncology
Pharmacist - Oncology
Pharmacist - Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist
Pharmacist - Oncology
Doctor of Pharmacy (Pharm.D.)
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Record deactivated on January 22, 2026
NPI status registered as active in NPPES database
Registered at 20 YORK ST, NEW HAVEN, CT 065103220 (Tel: 2032004444)
Registered at 1240 LILAC CT, CHESHIRE, CT 064103659 (Tel: 2032711552)
Recorded as JON TESSLER
Pharmacist (License #PCT.0005309 in CT)
First registered as active Individual Practitioner in NPPES Database.
Patient & Community Reviews
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NPI Administrative Meta
Mailing Address
1240 Lilac Ct
Cheshire, CT 064103659
Phone: 2032711552
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