Summary

Dr. John Zak specializes in gastroenterology, focusing on digestive health and disorders of the gastrointestinal tract. He earned his medical degree from Ross University School of Medicine and brings over four decades of clinical experience to his practice. Dr. Zak is fluent in English, French, and Spanish, allowing him to communicate effectively with a diverse patient population.

Dr. Zak practices at multiple AdventHealth locations across central Florida, including facilities in Daytona Beach, Palm Coast, and DeLand, as well as Halifax Health Medical Center in Daytona Beach. He specializes in treating conditions such as gastritis and diverticular disease. His procedural expertise includes performing colonoscopies and both upper and lower gastrointestinal endoscopies to diagnose and monitor digestive health issues. Patients have given him an average rating of 3.1 on Vitals.

Overview based on verified provider data

Quick Facts

  • 3.1
  • 42 years of experience
  • speaks English, French, Spanish
  • Ross University School Of Medicine
  • 7 written reviews
  • 1 specialty
  • 7 areas of expertise
  • 5 hospital affiliations
  • 5 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. John M Zak has 5 locations

Adventhealth Daytona Beach

301 Memorial Medical PkwyDaytona Beach, FL 32117

Adventhealth Palm Coast

60 Memorial Medical PkwyPalm Coast, FL 32164

Adventhealth Deland

701 W Plymouth AveDeland, FL 32720

Advent Health Palm Coast Parkway

1 Adventhealth WayPalm Coast, FL 32137

Halifax Health Medical Center

303 N Clyde Morris BlvdDaytona Beach, FL 32114

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Dr. John M Zak III, MDLynn Collette-Zachar, APRNWhitney Morgan, APRNAlexandra Morgan, APRN
GastroenterologyGastroenterologyGastroenterologyGastroenterology
Accepts New Patients Accepts New Patients Accepts New Patients
3.1 
42 Years of Experience
No Virtual Visit Option Virtual Visit Available Virtual Visit Available Virtual Visit Available
Speaks English, French, Spanish Speaks English Speaks English Speaks English
Daytona Beach , FLTallahassee , FLTallahassee , FLLittleton , CO
Med School: Ross University School Of Medicine Med School: Regis College Med School: Chamberlain University Med School: Chamberlain University
Current Profile
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Insurance Plans Accepted by Dr. John M Zak

Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.

Medical Specialties

Dr. John M Zak has the following specialty

Specialty Expertise

Dr. John M Zak has the following 7 areas of expertise

  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Constipation
  • Gastrointestinal Hemorrhage
  • Hemochromatosis
  • Hepatitis C
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Certifications, License, & Education

42 Years Experience

Dr. John M Zak holds an expired medical license in the state of Florida.

Medical License

Medical Doctor with an expired medical license in the state of Florida that expired in 2026.

Education & Training

Medical School

Graduated from Ross University School Of Medicine in 1984.

NPI Number

Dr. Zak's NPI number is 1548210594.

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Frequently Asked Questions

How can I make an appointment with Dr. John Zak?
You can find contact information for Dr. John Zak here on Vitals.
What languages does Dr. John Zak speak?
Dr. John Zak speaks English, French, and Spanish.
Which hospitals is Dr. John Zak affiliated with?
Dr. John Zak is affiliated with Adventhealth Daytona Beach, Halifax Health Medical Center, Adventhealth Deland, Adventhealth Palm Coast, and ADVENT HEALTH PALM COAST PARKWAY.
Does Dr. John Zak accept my insurance?
You can see the insurance plans that Dr. John Zak accepts on their Vitals profile.
Where is Dr. John Zak's office located?
Dr. John Zak's office is located at 301 Memorial Medical Pkwy, Daytona Beach, FL, 32117.

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