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Dr. Mark Sugar, MD
Allergist & Immunologist, Pediatrician, Internist
42 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 (8)

The overall average patient rating of Dr. Mark Sugar, Allergist & Immunologist, Pediatrician, Internist is Average. Dr. Sugar has been reviewed by 14 patients who have provided 8 comments. The rating is 3 out of 5 stars.

Patient Ratings
Ease of Appointment 3.9
Promptness 4.0
Courteous Staff 3.7
Accurate Diagnosis 4.5
Bedside Manner 3.4
Spends Time with Me 3.7
Follows Up After Visit 3.4

Specialties & Research

Dr. Mark Sugar, MD is board certified in Allergy & Immunology and Pediatrics.

  • He has special expertise in 11 areas:
  • Anaphylaxis
  • Asthma
  • Atopic Dermatitis
  • Drug Allergy
  • Eczema
  • Food Allergy (Hypersensitivity)
  • Hay Fever (Seasonal Allergic Rhinitis)
  • Hives (Urticaria)
  • Immunotherapy
  • Nasal Allergy (Rhinitis)
  • Sinus Infection (Sinusitis)

Education & Awards

Dr. Sugar graduated from Univ. Of Maryland School Of Medicine.


Dr. Sugar has 4 hospital affiliations:

  • Mission Hospital 
  • Saddleback Memorial Medical Center-Laguna Hills 


  • Spanish
  • French
  • English

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Additional Information
Dr. Mark Steven Sugar MD is a male Allergist & Immunologist, has 42 years of experience and practices in Allergy & Immunology, Allergy, and Pediatrics.
Where does Dr. Mark S. Sugar practice?
Dr. Mark Sugar has 1 office location.
Dr. Mark Sugar practices Allergy & Immunology, Allergy, and Pediatrics near Mission Viejo, CA.
See Mission Viejo Allergists and Mission Viejo Pediatricians.