Dr. William Klein, MD

Dr. William Klein, MD

Internal Medicine  ·  
Male  ·  
Age 52
Dr. William Klein, MD is an internal medicine specialist in Great Neck, NY and has been practicing for 21 years. He graduated from Mount Sinai School Of Medicine Of New York University in 1994 and specializes in internal medicine.

1000 Northern Blvd Ste 230

Great Neck, NY 11021

Contact Information

(516) 627-4433

Insurance Accepted

  • Aetna
  • Blue Cross Blue Shield
  • Cigna
  • EmblemHealth
  • Empire Blue Cross Blue Shield
  • Health Net
  • MultiPlan
  • Oxford Health Plans
  • UnitedHealthCare
  • 2 More

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Learn about Dr. Klein

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Care Philosophy

This content was provided by Dr. Klein "Dr. Klein joined HealthBridge after many years as a full time faculty physician at Mt. Sinai School of Medicine. He is Board Certified in Internal Medicine, and is accepting a limited number of new patients in his Concierge Medicine practice. He has been voted by his fellow physicians "Top Regional Doctor" in the prestigious Castle Connelly ratings, awarded to only 1% of practicing physicians in the tri-state area."

1  Specialties

  • Internal Medicine

1  Board Certifications

  • Internal Medicine
    Accredited by: American Board of Internal Medicine*

80  Conditions Treated

Read Less

22  Procedures

Background Check

0 Malpractice Claims

No malpractice history found for New York.

0 Sanctions

No sanctions history found for the years that Healthgrades collects data.

0 Board Actions

No board actions found for the years that Healthgrades collects data.


  • Mount Sinai School Of Medicine Of New York University
    Medical School | Graduated 1994
  • Mt Sinai Hospital
    Internship Hospital | Completed 1995
  • Mt Sinai Hospital
    Residency Hospital | Completed 1997

Awards & Recognition

Awards & Honors
  • Healthgrades Honor Roll
Media & Publications

Dr. Klein has no media or publications listed.

Languages Spoken

  • English
  • Spanish

Memberships & Professional Affiliations

Dr. Klein does not have any memberships or affiliations listed. If you are Dr. Klein and would like to add memberships or affiliations, please update your profile.

Dr. Klein's Reviews

Likelihood of recommending Dr. Klein to family and friends
27 total reviews (3 have comments)

Likelihood to Recommend (27)

  • 5
  • 4
  • 3
  • 2
  • 1

Dr. Klein's Performance

  • Trustworthiness

  • Explains condition(s) well

  • Answers questions

  • Time well spent


Office & Staff Performance

  • Scheduling

  • Office environment

  • Staff friendliness

  • Average wait time

    16 to 30 minutes

Patient Comments (3)

Consierge practice and worth it. Dr. Klein is the brightest, most well-connected physician I know.. He thinks outside the box to figure out the symptom/cause relationship. He has close relationships with other top doctors in their field both on LI and in Manhattan.
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Was one of Klein's 1st patients when he joined Healthbridge. He was ok until I "dared" to express my dissatisfaction at having to wait 2+ hrs for a previously scheduled appt, including the time my appendix almost burst! After many years of his blatant disregard for his patient's time, when I...more
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I became a concierge patient of Dr. Klein's because he is my point person for all of the other health care professionals I see. I needed a doctor who is going to take the time to discuss my health issues, which most doctors do not have time for given the direction that medical care is going. He is...more
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