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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. Daniel Greenfield:

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Specialties & Research

Dr. Daniel Greenfield, MD, MPH, MS is board certified in Preventive Medicine and Psychiatry.

  • He 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. Greenfield graduated from University of North Carolina, Chapel Hill.


Dr. Greenfield has 1 hospital affiliations:

  • John F Kennedy Medical Center 


  • English

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Additional Information
Dr. Daniel P Greenfield MD, MPH, and MS is a male Preventative Medicine Specialist, has 41 years of experience and practices in Preventive Medicine and Psychiatry.
Where does Dr. Daniel P. Greenfield practice?
Dr. Daniel Greenfield has 1 office location.
Dr. Daniel Greenfield practices Preventive Medicine and Psychiatry near Millburn, NJ.
See Millburn Preventive Medicine Specialists and Millburn Psychiatrists.