Dr. Isla Mariann McKerrow Johnson, MD

Dr. Johnson practices at Mayo Clinic Hospital, Saint Marys Campus in Rochester, Minnesota, part of Mayo Clinic.

Dr. Johnson's NPI, 1417585571, was assigned on April 1, 2020. Dr. Johnson graduated from Oregon Health Sciences University School of Medicine in 2020. Dr. Johnson holds Minnesota license 70741.

Dr. Johnson's primary practice is Mayo Clinic Hospital, Saint Marys Campus, at 1216 Second Street Southwest, Rochester, MN 55902 in Olmsted County. The practice phone is (507) 255-5123.

Dr. Johnson's primary practice is Mayo Clinic Hospital, Saint Marys Campus in Rochester, Minnesota, part of Mayo Clinic. The medical group on file is Mayo Clinic. Dmand AI also links Dr. Johnson to 1 more hospice, named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johnson practices, 2 sites in all. Vendor and product names are available with a free account.

Hematology and oncology is Dr. Johnson's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Johnson is licensed in Minnesota.

CMS data shows 130 Medicare services from Dr. Johnson across 3 procedure codes in 2024, all of them office visits, for 98 Medicare patients. Medicare paid $16,576 for them. Every service was in an office.

CMS counts 98 Medicare patients who saw Dr. Johnson in 2024. The largest group is 65 to 74, with 47 patients. 75% of them have high blood pressure, and 70% have high cholesterol. Their average risk score is 2.48, 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 70, with 40% women.

In 2024, Dr. Johnson wrote 128 Medicare Part D claims for 42 patients. 91% of them were for generic drugs. CMS names the drug for 24 of them, across 2 drugs with 11 or more claims each, at $295 in total drug cost. In 2023, CMS named 19 claims across 1 drug.

Dr. Johnson accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Johnson as offering telehealth.

Dmand AI links 11 papers to Dr. Johnson, published from 2021 to 2025. 2023 was the busiest year, with 5. The most frequent topics are Bridged Bicyclo Compounds, Heterocyclic, Sulfonamides and Antineoplastic Combined Chemotherapy Protocols. Dr. Johnson has published most often in Am J Hematol. Dr. Johnson's most frequent co-authors are Hassan B. Alkhateeb, MD, Ayalew Tefferi, MD and Kebede H. Begna, MD.

Dr. Johnson graduated from Oregon Health Sciences University School of Medicine in 2020.