Dr. Alyson McGhan Johnson, MD

Dr. Johnson practices at Duke University Hospital in Durham, North Carolina, part of Duke University.

Dr. Johnson's NPI, 1962778118, was assigned on March 31, 2012. Dr. Johnson graduated from Perelman School of Med at the University of Pennsylvania in 2012. Dr. Johnson holds North Carolina license 201600412.

Dr. Johnson's primary practice is Duke University Hospital, at 2301 Erwin Rd, Durham, NC 27705 in Durham County. The practice phone is (919) 684-8111.

Dr. Johnson's primary practice is Duke University Hospital in Durham, North Carolina, part of Duke University. The medical group on file is Duke Health Integrated Practice. Dmand AI also links Dr. Johnson to 2 more group practices and clinics and 1 medical group, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johnson practices, 3 sites in all. Vendor and product names are available with a free account.

Gastroenterology is Dr. Johnson's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Johnson is licensed in North Carolina.

CMS data shows 305 Medicare services from Dr. Johnson across 13 procedure codes in 2024, for 212 Medicare patients. Medicare paid $31,197 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 212 Medicare patients who saw Dr. Johnson in 2024. The largest group is 65 to 74, with 112 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 10% are also on Medicaid. Their average risk score is 1.83, 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. Johnson's median patient age at 71, with 62% women.

In 2024, Dr. Johnson wrote 98 Medicare Part D claims for 66 patients. 86% of them were for generic drugs. CMS names the drug for 47 of them, across 3 drugs with 11 or more claims each, at $518 in total drug cost. In 2023, CMS named 66 claims across 3 drugs.

Dr. Johnson accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 166 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Johnson, more than 87% of the clinicians it reports for that procedure.

CMS Open Payments shows 17 general payments to Dr. Johnson from 3 drug and device companies from 2019 to 2025. Grants make up the largest share, 96% of the total. Boston Scientific Corporation paid the most, $51,245.

Dr. Johnson graduated from Perelman School of Med at the University of Pennsylvania in 2012.