Dr. Nizar P. Hallak, MD

Dr. Hallak practices at HCA Healthcare Trident Hospital in Charleston, South Carolina, part of HCA Healthcare.

Dr. Hallak's NPI, 1861627697, was assigned on May 22, 2009. Dr. Hallak holds South Carolina license 51592.

Dr. Hallak's primary practice is HCA Healthcare Trident Hospital, at 9330 Medical Plaza Dr, Charleston, SC 29406 in Charleston County. The practice phone is (843) 847-4100.

Dr. Hallak's primary practice is HCA Healthcare Trident Hospital in Charleston, South Carolina, part of HCA Healthcare. Dr. Hallak is also affiliated with MaineHealth Maine Medical Center. The medical group on file is Coastal Carolina Surgical Specialists. Dmand AI also links Dr. Hallak to 2 more hospitals and 4 medical groups, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hallak practices, 4 sites in all. Vendor and product names are available with a free account.

Gastroenterology is Dr. Hallak's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dmand AI has Dr. Hallak's licenses on file in 4 states: South Carolina, Florida, Maine and Wisconsin.

CMS data shows 524 Medicare services from Dr. Hallak across 13 procedure codes in 2024, for 333 Medicare patients. Medicare paid $53,598 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 333 Medicare patients who saw Dr. Hallak in 2024. The largest group is 65 to 74, with 118 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 22% are also on Medicaid. Their average risk score is 2.73, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Hallak's median patient age at 70, with 55% women.

In 2024, Dr. Hallak wrote 83 Medicare Part D claims for 54 patients. 69% of them were for generic drugs. CMS names the drug for 56 of them, across 3 drugs with 11 or more claims each, at $10,692 in total drug cost. In 2023, CMS named 137 claims across 4 drugs.

Dr. Hallak accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 124 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Hallak, more than 81% of the clinicians it reports for that procedure.

CMS Open Payments shows 34 general payments to Dr. Hallak from 14 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $593.