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

Dr. Bernard Jay Nash, MD

Individual provider Internal Medicine Physician · NPI 1831196187

Dr. Bernard Jay Nash, MD is an Infectious Disease in West Islip, New York. Graduated from Georgetown University School of Medicine in 1975, 51 years ago. Practices with North Shore-Lij Medical PC, a 6,350-clinician group, accepts Medicare assignment and offers telehealth. Licensed in New York.

Years since qualifying
51
Trained at
Georgetown University School of Medicine
Licensed in
NY
In the registry since
2005
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

500 Montauk Hwy Ste S
West Islip, NY 11795-4420
Phone: (631) 587-7733
Fax: (631) 587-7798
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 145915 (NY)

Record details

NPI number1831196187
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 1, 2005
Last updated in NPPESMarch 15, 2013
Mailing address500 Montauk Hwy, Ste S, West Islip, NY 11795-4420

Medicare enrollment

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

Medicare specialtyINFECTIOUS DISEASE
Also practisesINTERNAL MEDICINE
Medical schoolGEORGETOWN UNIVERSITY SCHOOL OF MEDICINE
Graduated 1975 (51 years in practice)
Group practice North Shore-Lij Medical Pc — 6350 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations6 on file with Medicare

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