Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.

Timothy Mark McMahon

Individual provider Diagnostic Radiology Physician · NPI 1467913442

Timothy Mark McMahon practises Diagnostic Radiology in Baltimore, Maryland. Qualified in 2019, 7 years ago. Practices with Johns Hopkins University, a 2,855-clinician group and works from 2 locations. Licensed in Maryland.

Years since qualifying
7
Licensed in
MD
In the registry since
2019

Practice location Address checks out

1800 Orleans St
Baltimore, MD 21264-5502
Phone: (410) 955-5000
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 16 Guion Pl, New Rochelle, NY 10801-5502 — (914) 632-5000

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence D0100466 (MD)

Record details

NPI number1467913442
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedMarch 30, 2019
Last updated in NPPESJuly 19, 2024
Certification dateJuly 19, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolOTHER
Graduated 2019 (7 years in practice)
Group practice Johns Hopkins University — 2855 clinicians
Accepts Medicare assignment Not indicated
Practice locations12 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients316
Services billed 438 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Johns Hopkins University

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2855 clinicians in the practice; 12 are shown here.

Other providers in Baltimore