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

Dr. Christopher Mark John, DO

Individual provider Diagnostic Radiology Physician · NPI 1669679569

Dr. Christopher Mark John, DO practises Diagnostic Radiology in Orlando, Florida. Graduated from Midwestern University, Chicago College of Osteopathic Med in 2006, 20 years ago. Practices with Appalachian Regional Healthcare Inc, a 293-clinician group. Licensed in California, Florida and Texas.

Years since qualifying
20
Trained at
Midwestern University, Chicago College of Osteopathic Med
Licensed in
CA, FL, TX
In the registry since
2007
Specialties on file
3
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

52 Underwood St
Orlando, FL 32806-1110
Phone: (407) 481-7174
Fax: (321) 843-6080
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence OS15940 (FL)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence 20A20771 (CA)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence P0069 (TX)

Record details

NPI number1669679569
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJuly 3, 2007
Last updated in NPPESSeptember 25, 2025
Certification dateSeptember 25, 2025

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Also practisesINTERVENTIONAL RADIOLOGY
Medical schoolMIDWESTERN UNIVERSITY, CHICAGO COLLEGE OF OSTEOPATHIC MED
Graduated 2006 (20 years in practice)
Group practice Appalachian Regional Healthcare Inc — 293 clinicians
Accepts Medicare assignment Not indicated
Practice locations20 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 patients1,556
Services billed 2,521 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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.

Colleagues at Appalachian Regional Healthcare Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 293 clinicians in the practice; 12 are shown here.

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