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Dr. William Chang, DO
Internist, Critical Care Specialist, Pulmonologist (lungs)
11 years of experience
Video profile
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

4.5
  •  
(7)
Patient comments (4)

The overall average patient rating of Dr. William Chang is Excellent. Dr. Chang has been reviewed by 7 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 4.7
  •  
Accurate Diagnosis 5.0
  •  
Bedside Manner 4.7
  •  
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)
Compassionate Doctor Recognition (2014)
On-Time Doctor Award (2014)

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 11 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 3 office locations.
Dr. William Chang practices Internal Medicine, Critical Care Medicine, and Pulmonary Disease near Mission Viejo, CA.
Additional practice locations include: San Juan Capistrano, CA and Tustin, CA.
See Mission Viejo Internists, Mission Viejo Critical Care Practitioners, and Mission Viejo Pulmonologists.