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

Dr. Mark Vincent Johnson, MD

Individual provider Diagnostic Radiology Physician · NPI 1740222587

Dr. Mark Vincent Johnson, MD practises Diagnostic Radiology in Mobile, Alabama. Graduated from University of Tennessee, Hsc, College of Medicine in 1990, 36 years ago. Practices with Oxford Pre Op and Imaging Center LLC, a 20-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Alabama.

Years since qualifying
36
Trained at
University of Tennessee, Hsc, College of Medicine
Licensed in
AL
In the registry since
2006
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

3719 Dauphin St
Mobile, AL 36608-1753
Phone: (251) 340-7786
Fax: (251) 461-2030
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 140 Burke Calhoun City Rd, Calhoun City, MS 38916-9690 — (662) 628-6622

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence 21483 (AL)

Record details

NPI number1740222587
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 12, 2006
Last updated in NPPESNovember 15, 2023
Certification dateNovember 15, 2023

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolUNIVERSITY OF TENNESSEE, HSC, COLLEGE OF MEDICINE
Graduated 1990 (36 years in practice)
Group practice Oxford Pre Op And Imaging Center Llc — 20 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations8 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 patients1,922
Services billed 3,660 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.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $18 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • North Mississippi Medical Center Hospital · Tupelo, MS
  • Tishomingo Health Services Inc Hospital · Iuka, MS · listed as Tishomingo Health Services, Inc
  • Mobile Infirmary Medical Center Hospital · Mobile, AL
  • Springhill Medical Center Hospital · Mobile, AL
  • Webster General Hospital/ Swing Bed Hospital · Eupora, MS

Colleagues at Oxford Pre Op and Imaging Center LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 20 clinicians in the practice; 12 are shown here.

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