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

Stephen Shepherd Johnston, MD

Individual provider Diagnostic Radiology Physician · NPI 1730525841

Stephen Shepherd Johnston, MD practises Diagnostic Radiology in Tucson, Arizona. Graduated from University of Arizona College of Medicine in 2013, 13 years ago. Practices with UNC Physicians Network LLC, a 986-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Arizona, Florida and Louisiana.

Years since qualifying
13
Trained at
University of Arizona College of Medicine
Licensed in
AZ, FL, LA
In the registry since
2013
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2492 E River Rd
Tucson, AZ 85718-9552
Phone: (520) 722-8994
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 4250 Hospital Dr, Marianna, FL 32446-1917 — (850) 526-2200

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence R73777 (AZ)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence 330999 (LA)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence ME170763 (FL)

Record details

NPI number1730525841
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 15, 2013
Last updated in NPPESFebruary 6, 2026
Certification dateFebruary 6, 2026

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolUNIVERSITY OF ARIZONA COLLEGE OF MEDICINE
Graduated 2013 (13 years in practice)
Group practice Unc Physicians Network Llc — 986 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations21 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 patients2,500
Services billed 3,624 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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. Those with a page here are linked.

  • Ascension Saint Thomas Hospital Hospital · Nashville, TN · listed as Saint Thomas West Hospital
  • Fmol Health St Francis Hospital · Monroe, LA · listed as St Francis School Based Health
  • Richardson Medical Center Hospital · Rayville, LA · listed as Richardson Medical Center Homecare
  • Our Lady Of The Lake Regional Medical Center Hospital · Baton Rouge, LA
  • Unc Health Nash Hospital · Rocky Mount, NC

Colleagues at UNC Physicians Network LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 986 clinicians in the practice; 12 are shown here.

Other providers in Tucson