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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) 626-8696
Web Page:
Recommend this Physician
4.7 out of 5 (147 Ratings | 12 Comments)


The doctor provided me the concerns about my health situation and explained in depth how to take my new medications.
Dr. Weissig is one of the best doctors I have ever seen. He has very good interaction with me. He is extremely good at diagnosing problems. I specifically asked him for clarification on how loss of weight might improve my health. His explanation was realistic, but encouraging, and showed thoughtfulness and care. I admire him greatly.
the best.
Always good experience.
I have had talk with doctor & hoping things better. I do respect doctor or would not continue. Too many patients!
12 Total Comments Page 1 2 3   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

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