Mary Elizabeth Callsen

Mary Callsen practices at Johns Hopkins Community Physicians, Inc in Bethesda, Maryland.

Mary Callsen's NPI, 1639137573, was assigned on May 2, 2006. Mary Callsen graduated from Ohio State University College of Medicine in 1981. Mary Callsen holds Maryland license D0059499.

Mary Callsen's primary practice is Johns Hopkins Community Physicians, Inc, at 7315 Wisconsin Ave, Bethesda, MD 20814 in Montgomery County. The practice phone is (410) 955-5000.

Mary Callsen's primary practice is Johns Hopkins Community Physicians, Inc in Bethesda, Maryland. Mary Callsen is also affiliated with The Johns Hopkins Hospital. The medical group on file is Johns Hopkins Community Physicians. Dmand AI also links Mary Callsen to 2 more hospitals, 2 home health agencies 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 Mary Callsen practices, 6 sites in all. Vendor and product names are available with a free account.

Internal medicine is Mary Callsen's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Mary Callsen is licensed in Maryland.

CMS data shows 2,052 Medicare services from Mary Callsen across 17 procedure codes in 2024, for 506 Medicare patients. Medicare paid $151,509 for them. Every service was in an office.

CMS counts 506 Medicare patients who saw Mary Callsen in 2024. The largest group is 65 to 74, with 227 patients. 75% of them have high cholesterol, and 66% have high blood pressure. 5% are also on Medicaid. Their average risk score is 0.79, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Mary Callsen's median patient age at 72, with 69% women.

In 2024, Mary Callsen wrote 4,561 Medicare Part D claims for 487 patients. 88% of them were for generic drugs. CMS names the drug for 3,880 of them, across 65 drugs with 11 or more claims each, at $318,899 in total drug cost. In 2023, CMS named 3,334 claims across 65 drugs.

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

CMS Open Payments shows 1 general payment to Mary Callsen from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Novo Nordisk Inc paid the most, $113.

Mary Callsen graduated from Ohio State University College of Medicine in 1981.