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Dr. William Lemaster Is this you?

About Dr. William Lemaster

Dr. William Lemaster, DO is a Doctor primarily located in Mount Sinai, NY, with another office in Port Jefferson, NY. He has 31 years of experience. His specialties include Psychiatry and Neurology. Dr. Lemaster is affiliated with John T Mather Memorial Hospital and John T Mather Memorial Hospital of Port Jefferson New York I. He speaks English.

Rating Overview

9 Ratings with 3 Comments

The overall average patient rating of Dr. William Lemaster is Great. Dr. William Lemaster has been rated by 9 patients. From those 9 patients 3 of those left a comment along with their rating. The overall rating for Dr. William Lemaster is 3.9 of 5.0 stars.

Mapbox Map of Dr. William Lemaster

Primary Address

5505 Nesconset Hwy
Mount Sinai, NY 11766
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Mapbox Map of Dr. William Lemaster

125 Oakland Ave
Port Jefferson, NY 11777
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Specialties

Dr. William Lemaster has the following 2 specialties

  • Psychiatry

    A psychiatrist is a doctor with specific training in the diagnosis and treatment of mental illness.
    He or she can not only provide the counseling necessary to both diagnose and treat a patient, but can also prescribe medication when needed. In some cases, a psychiatrist will only provide the medication and the counseling will be provided by another healthcare specialist, like a certified counselor or psychologist.
    Like other doctors, psychiatrists employ diagnostic tools like CT scans and MRI in order to observe the structure and function of a patient's brain.
    Once a diagnosis is made, these specialists may use behavior or cognitive therapy in order to address the patient's condition, or a multitude of other types of therapy, in conjunction with or in place of medication.

  • Neurology

    A neurologist is a physician who diagnoses and treats disorders of the nervous system which is comprised of the brain, spinal cord and nerves. These doctors do not perform surgery, but refer patients to neurological surgeons when they determine that surgical intervention is necessary.
    Some of the conditions that neurologists diagnose and treat are epilepsy, aneurysms, hydrocephalus, Parkinson's disease, multiple sclerosis, stroke, spinal disc herniation, and spinal disease.
    In addition to using diagnostic tests like MRI, CT scans, EEG and EMG, neurologists also employ neurological testing to gauge muscle strength and movement, balance, reflexes, sensation, memory, speech, and other cognitive abilities.

  • Expertise

    7 Expertise

  • Attention Deficit Disorder (ADD) / Attention Deficit Hyperactivity Disorder (ADHD)
  • Bipolar Disorder / Manic Depressive Disorder
  • Depression
  • Depressive Disorder
  • Insomnia
  • Schizophrenia
  • Sleep Disorders

Reviews

Showing 5 of 9

Five Stars

Excellent psychiatrist. Really takes his time with me, waiting time is brief compared to others. Very courteous and caring.

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Five Stars

I saw Dr. Lemaster for several years. He is a wonderful psychiastrist. I work in the health care firld, and have also referred a number of people to him. Everyone I have referred to him has also been very pleased with him.

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15 minutes
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One Star

Was one of the Psychiatrists while my son was in the in patient psychiatric unit at Mather hospital. Not only did he hardly speak to my adult son while he was admitted in the hospital; but he prescribed medication without giving my (adult) son any information on the medication or why it was being administered. Further more he completely misdiagnosed my son with bipolar II when two outside Psychiatrists he chose to follow up with diagnosed him with an anxiety disorder which they said could not even be closely considered bipolar II. Personally after dealing with my son's mental illness I have a much deeper understanding for mental illnesses and have to say that William G. Lemaster is not only an unethical practitioner but also an irresponsible one. From speaking to families of other patients I learned that he heavily medicated many of his patients and his primary diagnosis for many of them was (yup you guessed it) bipolar II. This man should not be allowed to practice in NYS anymore. Hopefully some other families and patients speak up about this man.

Wait time
56 minutes
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Five Stars
Five Stars
  • Hospital Affiliations

    Dr. Lemaster is affiliated (can practice and admit patients) with the following hospital(s).

  • John T Mather Memorial Hospital
  • John T Mather Memorial Hospital of Port Jefferson New York I
  • Education

    31 Years Experience

  • Kirksville College Of Osteopathic Medicine

    Graduated in 1982

  • Kirksville Osteo Medical Center

    Residency

  • Accepted Insurance

    Dr. William Lemaster accepts the following insurance providers.

  • Humana
    • Humana Choice POS
    • Humana ChoiceCare Network PPO
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Locations & Directions

Video

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  • Nearby Doctors

    Dr. William Lemaster is similar to the following 3 Doctors near Mount Sinai, NY.