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38 years of experience
Accepting new patients
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. Marianne Hendrix:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (28)

The overall average patient rating of Dr. Marianne Hendrix is Average. Dr. Hendrix has been reviewed by 71 patients who have provided 28 comments. The rating is 3 out of 5 stars.

Patient Ratings
Ease of Appointment 3.4
Promptness 2.6
Courteous Staff 3.2
Accurate Diagnosis 2.7
Bedside Manner 2.3
Spends Time with Me 2.5
Follows Up After Visit 2.5

Specialties & Research

  • She has special expertise in 7 areas:
  • Attention Deficit Disorder (ADD) / Attention Deficit Hyperactivity Disorder (ADHD)
  • Bipolar Disorder / Manic Depressive Disorder
  • Depression
  • Depressive Disorder
  • Insomnia
  • Schizophrenia
  • Sleep Disorders

Education & Awards

Dr. Hendrix graduated from Vrije Universiteit Brussels.


Dr. Hendrix has 2 hospital affiliations:

  • St Catherine Of Siena Medical Center 
  • St Catherine Of Siena Hospital 


  • Finnish
  • Spanish
  • Italian
  • German
  • Dutch
  • French
  • Afrikaans

> > > > Dr. Marianne Hendrix, MD

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Additional Information
Dr. Marianne P Hendrix MD is a female Psychiatrist, has 38 years of experience and practices in Psychiatry.
Where does Dr. Marianne P. Hendrix practice?
Dr. Marianne Hendrix has 1 office location.
Dr. Marianne Hendrix practices Psychiatry near Smithtown, NY.
See Smithtown Psychiatrists.