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Dr. Jack Greenwood, MD

Dr. Jack Greenwood, MD

Age 73 Neurology M
(11) 11 reviews

Telehealth available

Accepting New Patients


Dr. Jack Greenwood, MD is a Neurology Specialist in Port Jefferson, NY. Dr. Greenwood completed a residency at New York University. They currently practice at Dan M Kass, MD and are affiliated with Stony Brook University Hospital, Mather Hospital and Saint Charles Hospital. Dr. Greenwood is board certified in Neurology with Special Qualification in Child Neurology and accepts accepts multiple insurance plans.


  • New York University, Residency Hospital — 1979
  • NEW YORK UNIV SCH OF MED, Medical School — 1974
  • Bucknell, Undergraduate School
  • NYU, Residency Hospital

Insurance Accepted

  • Aetna
  • Anthem
  • Blue Cross Blue Shield
  • CareFirst Blue Cross Blue Shield
  • Cigna
  • Commercial Insurance Company
  • EmblemHealth
  • Empire Blue Cross Blue Shield
  • Fidelis Care
  • Government Employees Health Association (GEHA)
  • Healthfirst
  • Locals (any local)
  • MagnaCare
  • MultiPlan
  • National Elevator
  • Oxford Health Plans
  • POMCO Group
  • UnitedHealthCare

* Please verify this information when scheduling an appointment.



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Jun 14, 2019
Very thorough Dr. Takes notes throughout your initial interview.. Very calm manner which works well with someone as nervous as I am. Secretary is very accommodating and sweet.
Carolyn Duquen Higgins in Smithtown, NY — Jun 14, 2019
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Frequently Asked Questions

Find contact information here to make an appointment.

A list of accepted insurance providers is available on the Sharecare insurance check. It is always a good idea to verify your insurance when making an appointment.

New patients are generally accepted by Dr. Jack Greenwood, MD. To arrange an appointment, call the number on Dr. Greenwood's profile.

Dr. Greenwood frequently treats the following conditions: Peripheral Nerve Disorders, Vertigo and Complex Regional Pain Syndrome (CRPS). See more on Sharecare.

Dr. Jack Greenwood, MD is affiliated with Stony Brook University Hospital, Mather Hospital and Saint Charles Hospital.

Yes, Dr. Jack Greenwood, MD holds board certification in Neurology with Special Qualification in Child Neurology.

Hospital Affiliations

  • Stony Brook University Hospital
  • Mather Hospital
  • Saint Charles Hospital


  1. Dan M Kass, MD

    1. 1
      Port Jefferson Office
      120 N Country Rd, Port Jefferson, NY 11777 (631) 474-0444
Telehealth Options
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(631) 474-0444