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Internist, Sleep Medicine Specialist
35 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. Dennis Nicholson:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (4)

The overall average patient rating of Dr. Dennis Nicholson is Good. Dr. Nicholson has been reviewed by 7 patients who have provided 4 comments. The rating is 4 out of 5 stars.

Patient Ratings
Ease of Appointment 4.7
Promptness 4.5
Courteous Staff 4.5
Accurate Diagnosis 5.0
Bedside Manner 4.2
Spends Time with Me 4.5
Follows Up After Visit 2.8

Specialties & Research

Dr. Dennis Nicholson, MD is board certified in Internal Medicine and Sleep Medicine.

  • He has special expertise in 1 area:
  • Insomnia

Education & Awards

Dr. Nicholson graduated from Case Western Reserve University , Cleveland. He has 1 awards.

Castle Connolly's Top Doctors™ (2012 - 2013)


Dr. Nicholson has 3 hospital affiliations:

  • Santa Barbara Cottage Hospital 
  • Pomona Valley Hospital Medical Center 
  • Goleta Valley Cottage Hospital 


  • English

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Additional Information
Dr. Dennis H Nicholson MD is a male Internist, has 35 years of experience and practices in Internal Medicine and Sleep Medicine.
Where does Dr. Dennis H. Nicholson practice?
Dr. Dennis Nicholson has 8 office locations.
Dr. Dennis Nicholson practices Internal Medicine and Sleep Medicine near Pomona, CA.
Additional practice locations include: Ventura, CA and Los Angeles, CA.
See Pomona Internists and Pomona Sleep Medicine Doctors.