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Critical Care Specialist, Pulmonologist (lungs)
25 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).

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Specialties & Research

Dr. Alexander Sy, MD is board certified in Critical Care Medicine and Pulmonary Disease.

  • He has special expertise in 7 areas:
  • Asthma
  • Chronic Obstructive Pulmonary Disease (COPD)
  • Critical Care
  • Nutritional Support
  • Sepsis (Blood Poisoning)
  • Sleep Apnea (Sleep Apnea Syndromes)
  • Sleep Disorders

Education & Awards

Dr. Sy graduated from University Of The Philippines Manila.


Dr. Sy has 8 hospital affiliations:

  • Palmetto Health Baptist 
  • Palmetto Health Richland 


  • Spanish
  • Chinese
  • Tagalog
  • Mandarin

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Additional Information
Dr. Alexander Ong Sy MD is a male Internist, has 25 years of experience and practices in Critical Care Medicine and Pulmonary Disease.
Where does Dr. Alexander O. Sy practice?
Dr. Alexander Sy has 5 office locations.
Dr. Alexander Sy practices Critical Care Medicine and Pulmonary Disease near Durham, NC.
Additional practice locations include: Columbia, SC and Raleigh, NC.
See Durham Critical Care Practitioners and Durham Pulmonologists.