> > > > Dr. Alexander Sy, MD
Dr. Alexander Ong Sy MD is a male Allergist, has 24 years of experience and practices in Internal Medicine, Critical Care Medicine, Pulmonary Disease, and Allergy.
Dr. Alexander Sy has 2 office locations.
2 Medical Park Rd
Columbia, SC 29203

Phone Number
Locations and availability (2)
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 9 areas:
  • Asthma
  • Chronic Obstructive Pulmonary Disease (COPD)
  • Critical Care
  • Food Allergy (Hypersensitivity)
  • Nasal Allergy (Rhinitis)
  • 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 11 hospital affiliations:

  • Palmetto Health Baptist 
  • North Carolina Baptist Hospitals 

Accepted Insurance Plans

Dr. Sy accepts these health insurances in at least one office:

  • Harvard Pilgrim Health Care - 3 plans
  • AMERIGROUP - 2 plans
  • Humana - 2 plans
  • Great-West Healthcare - 2 plans


  • Chinese
  • Mandarin
  • Spanish
  • Tagalog

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Additional Information
Where does Dr. Alexander O. Sy practice?
Dr. Alexander Sy practices Internal Medicine, Critical Care Medicine, Pulmonary Disease, and Allergy near Columbia, SC.
Additional practice locations include: Winston Salem, NC.
See Columbia Internists, Columbia Critical Care Practitioners, Columbia Pulmonologists, and Columbia Allergists.