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Internist, Family Practitioner
21 years of experience
Video profile
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).

Patient Reviews

Patient comments (1)

The overall average patient rating of Dr. Steven Marks, Internist, Family Practitioner is Good. Dr. Marks has been reviewed by 5 patients who have provided 1 comments. The rating is 3.5 out of 5 stars.

Patient Ratings
Ease of Appointment 2.1
Promptness 3.1
Courteous Staff 3.3
Accurate Diagnosis 2.8
Bedside Manner 3.1
Spends Time with Me 3.4
Follows Up After Visit 3.1

Specialties & Research

Dr. Steven Marks, DO is board certified in Internal Medicine and Sleep Medicine.

  • He has special expertise in 11 areas:
  • Asthma
  • Bronchoscopy
  • Chronic Obstructive Pulmonary Disease (COPD)
  • Emphysema
  • Insomnia
  • Narcolepsy
  • Pulmonary Function Test
  • REM Sleep Behavior Disorder
  • Restless Legs Syndrome
  • Sleep Apnea (Sleep Apnea Syndromes)
  • Sleep Disorders

Education & Awards

Dr. Marks graduated from Western University of Health Sciences, Pomona.


Dr. Marks has 2 hospital affiliations:

  • Banner Desert Medical Center 
  • Mountain Vista Hospital 


  • Spanish

> > > > Dr. Steven Marks, DO

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Additional Information
Dr. Steven Alan Marks DO is a male Internist, has 21 years of experience and practices in Internal Medicine, Critical Care Medicine, and Sleep Medicine.
Where does Dr. Steven A. Marks practice?
Dr. Steven Marks has 4 office locations.
Dr. Steven Marks practices Internal Medicine, Critical Care Medicine, and Sleep Medicine near Flagstaff, AZ.
Additional practice locations include: Mesa, AZ and Phoenix, AZ.
See Flagstaff Internists, Flagstaff Critical Care Practitioners, and Flagstaff Sleep Medicine Doctors.