Pediatric Specialist, Cardiologist (heart)
27 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).

Patient Reviews

Patient comments (3)

The overall average patient rating of Dr. Mark Cocalis is Excellent. Dr. Cocalis has been reviewed by 8 patients who have provided 3 comments. The rating is 5 out of 5 stars.

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

Specialties & Research

Dr. Mark Cocalis, MD is board certified in Pediatric Cardiology.

Education & Awards

Dr. Cocalis graduated from University of California at Los Angeles. He has 4 awards.

Castle Connolly's Top Doctors™ (2012 - 2013)
Patients' Choice Award (2013)
Compassionate Doctor Recognition (2013)
Top 10 Doctor - State (2014)
Pediatric Cardiologist


Dr. Cocalis has 8 hospital affiliations:

  • San Joaquin General Hospital 
  • John Muir Medical Center, Walnut Creek Campus 


  • Spanish
  • French
  • English

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Additional Information
Dr. Mark Williams Cocalis MD is a male Pediatric Cardiologist, has 27 years of experience and practices in Pediatric Cardiology.
Where does Dr. Mark W. Cocalis practice?
Dr. Mark Cocalis has 5 office locations.
Dr. Mark Cocalis practices Pediatric Cardiology near Modesto, CA.
Additional practice locations include: San Diego, CA and Vista, CA.
See Modesto Pediatric Specialists.