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Dr. William Chang, DO
Internist, Critical Care Specialist, Pulmonologist (lungs)
12 years of experience
Accepting new patients
Video profile
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

4.5
  •  
(9)
Patient comments (4)

The overall average patient rating of Dr. William Chang is Excellent. Dr. Chang has been reviewed by 9 patients who have provided 4 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 5.0
  •  
Promptness 5.0
  •  
Courteous Staff 4.8
  •  
Accurate Diagnosis 5.0
  •  
Bedside Manner 4.8
  •  
Spends Time with Me 5.0
  •  
Follows Up After Visit 5.0
  •  

Specialties & Research

Dr. William Chang, DO, MD is board certified in Internal Medicine, Critical Care Medicine, and Pulmonary Disease.

  • He has special expertise in 5 areas:
  • Asthma
  • Central Sleep Apnea
  • Disorders of Excessive Sleepiness (Hypersomnia)
  • Obstructive Sleep Apnea
  • REM Sleep Behavior Disorder

Education & Awards

Dr. Chang graduated from Michigan State University College of Osteopathic Medicine, East Lansing. He has 3 awards.

Awards  
Patients' Choice Award (2014 - 2015)
Compassionate Doctor Recognition (2014)
On-Time Doctor Award (2014 - 2015)

Affiliations

Dr. Chang has 13 hospital affiliations:

  • Saddleback Memorial Medical Center-Laguna Hills 
  • South Coast Medical Center/Adventist Health 

Languages

  • Taiwanese
  • Mandarin
  • Chinese
  • English

> > > > Dr. William Chang, DO, MD

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Additional Information
Dr. William Wei-Ming Chang DO and MD is a male Internist, has 12 years of experience and practices in Internal Medicine, Critical Care Medicine, and Pulmonary Disease.
Where does Dr. William W. Chang practice?
Dr. William Chang has 1 office location.
Dr. William Chang practices Internal Medicine, Critical Care Medicine, and Pulmonary Disease near San Juan Capistrano, CA.
See San Juan Capistrano Internists, San Juan Capistrano Critical Care Practitioners, and San Juan Capistrano Pulmonologists.