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Mark D.  Weissig MD
Practice accepting new patients.

Mark D. Weissig MD

(714) 626-8650
Primary Specialties
  • Pulmonology
    (Board Certified)
Secondary Specialties
  • Internal Medicine
    (Board Certified)
Medical Groups & Affiliations
  • St. Jude Heritage Medical Group

Primary Office

2141 N. Harbor Blvd.
Suite 2500
Fullerton, CA 92835
(714) 626-8650
(714) 626-8670
Web Page:
Recommend this Physician Request an Update for this Physician
4.9 out of 5 (146 Ratings | 26 Comments)


Excellent doctor.
A visit with *Dr Weissig is always an informative adventure... hearing about new stories & changing medicines or therapies.
Please thank this doctor for evaluating and providing care for my health conditions.
very good doctor.
Dr. Weissig is a gem. Even though it is difficult to get an appointment or get the staff to call back, he is so thorough and good I will always come back to him as my physician.
26 Total Comments Page 1 2 3 4 5 6   Next


  • Medical School:
    Duke University School of Medicine - Durham, NC
  • Internship:
    Duke University Medical Center - Durham, NC
  • Residency:
    Duke University Medical Center - Durham, NC
  • Fellowship:
    UCLA School of Medicine - Los Angeles, CA
  • Board Certified in Internal Medicine
  • Board Certified in Pulmonology

Areas of Interest

  • Asthma
  • Sleep disorders
  • COPD
  • Smoking Cessation
  • Pulmonary Fibrosis