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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. Dennis Spencer:

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  1. Qualifications
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Patient Reviews

Patient comments (7)

The overall average patient rating of Dr. Dennis Spencer is Excellent. Dr. Spencer has been reviewed by 18 patients who have provided 7 comments. The rating is 5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.1
Promptness 4.3
Courteous Staff 4.9
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 4.9
Follows Up After Visit 5.0

Specialties & Research

Dr. Dennis Spencer, MD is board certified in Neurological Surgery.

  • He has special expertise in 12 areas:
  • Brain Arteriovenous Malformation (Intracranial Arteriovenous Malformations)
  • Brain Cancer
  • Brain Disorder
  • Cancer
  • Complex Partial Epilepsy
  • Craniotomy (Brain Surgery)
  • Epilepsy
  • Glial Cancer (Glioma)
  • Gliosis
  • Memory Disorders
  • Parkinson Disease
  • Temporal Lobe Epilepsy

Education & Awards

Dr. Spencer graduated from Washington University at St. Louis, Saint Louis. He has 13 awards.

One of America's Leading Experts on:
Brain Cancer (Brain Neoplasm)
Brain Diseases
Complex Partial Epilepsy
Memory Disorders
Temporal Lobe Epilepsy
Castle Connolly America's Top Doctors® (2002 - 2008, 2010 - 2015)
Patients' Choice 5th Anniversary Award (2012 - 2014)
Patients' Choice Award (2008 - 2014)
Compassionate Doctor Recognition (2009 - 2010, 2012 - 2014)
Top 10 Doctor - State (2014)
Neurological Surgeon
On-Time Doctor Award (2009)


Dr. Spencer has 11 hospital affiliations:

  • William W Backus Hospital 
  • Hospital Of St Raphael 


  • Italian
  • Spanish

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Additional Information
Dr. Dennis D Spencer MD is a male Neurosurgeon, has 40 years of experience and practices in Neurological Surgery.
Where does Dr. Dennis D. Spencer practice?
Dr. Dennis Spencer has 1 office location.
Dr. Dennis Spencer practices Neurological Surgery near New Haven, CT.
See New Haven Neurological Surgeons.