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

Individual provider General Practice Physician · NPI 1437157203

John Joseph Oconnor, MD practises Neurology in Prescott, Arizona. Graduated from University of Chicago, Pritzker School of Medicine in 1986, 40 years ago. Practices as a sole proprietor. Licensed in Arizona.

Years since qualifying
40
Trained at
University of Chicago, Pritzker School of Medicine
Licensed in
AZ
In the registry since
2005
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

3109 Clearwater Dr Ste A
Prescott, AZ 86305 Not confirmed with CMS for 13 years — call before visiting
Phone: (928) 778-1066
Fax: (928) 778-7270
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

General Practice Physician (primary) Taxonomy 208D00000X · Licence 25148 (AZ)

Record details

NPI number1437157203
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 14, 2005
Last updated in NPPESSeptember 3, 2013

Medicare enrollment

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

Medicare specialtyNEUROLOGY
Medical schoolUNIVERSITY OF CHICAGO, PRITZKER SCHOOL OF MEDICINE
Graduated 1986 (40 years in practice)
Accepts Medicare assignment Not indicated
Practice locations2 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 patients572
Services billed 1,488 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.

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