Dr. William T. Halligan, MD

Dr. Halligan practices at Prisma Health Greenville Memorial Hospital in Greenville, South Carolina, part of Prisma Health.

Dr. Halligan's NPI, 1255698163, was assigned on April 16, 2012. Dr. Halligan graduated from Medical University of South Carolina College of Medicine in 2012. Dr. Halligan holds South Carolina license 39407.

Dr. Halligan's primary practice is Prisma Health Greenville Memorial Hospital, at 701 Grove Road, Greenville, SC 29605 in Greenville County. The practice phone is (864) 455-7000.

Dr. Halligan's primary practice is Prisma Health Greenville Memorial Hospital in Greenville, South Carolina, part of Prisma Health. Dr. Halligan is also affiliated with Prisma Health Patewood Hospital. The medical group on file is Prisma Health Medical Group. Dmand AI also links Dr. Halligan to 3 more hospitals and 1 group practice or clinic, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Halligan practices, 6 sites in all. Vendor and product names are available with a free account.

Cardiovascular disease is Dr. Halligan's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Halligan is licensed in South Carolina.

CMS data shows 2,624 Medicare services from Dr. Halligan across 17 procedure codes in 2024, for 1,353 Medicare patients. Medicare paid $119,515 for them.

CMS counts 1,353 Medicare patients who saw Dr. Halligan in 2024. The largest group is 65 to 74, with 538 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 6% are also on Medicaid. Their average risk score is 1.53, 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. Halligan's median patient age at 61, with 56% women.

In 2024, Dr. Halligan wrote 3,712 Medicare Part D claims for 616 patients. 76% of them were for generic drugs. CMS names the drug for 3,516 of them, across 36 drugs with 11 or more claims each, at $790,898 in total drug cost. In 2023, CMS named 2,807 claims across 36 drugs.

Dr. Halligan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

CMS Open Payments shows 233 general payments to Dr. Halligan from 26 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 98% of the total. Novartis Pharmaceuticals Corporation paid the most, $822.

Dr. Halligan graduated from Medical University of South Carolina College of Medicine in 2012.