Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Jonathan Austin Deassis, MD

Individual provider Student in an Organized Health Care Education/Training Program · NPI 1689178980

Dr. Jonathan Austin Deassis, MD is an Emergency Medicine in Stony Brook, New York. Qualified in 2018, 8 years ago. Practices with Icahn School of Medicine at Mount Sinai, a 2,791-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
8
Licensed in
NY
In the registry since
2018
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

101 Nicolls Rd Rm 80
Stony Brook, NY 11794-0001
Phone: (631) 444-3880
Fax: (631) 444-3919
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 308087 (NY)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1689178980
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 21, 2018
Last updated in NPPESMay 20, 2021
Certification dateMay 20, 2021
Mailing address289 Kramer Ave, Staten Island, NY 10309-4275

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyEMERGENCY MEDICINE
Medical schoolOTHER
Graduated 2018 (8 years in practice)
Group practice Icahn School Of Medicine At Mount Sinai — 2791 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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