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

Mark E. Gregory, MD

Individual provider Emergency Medicine Physician · NPI 1659346963

Mark E. Gregory, MD is an Emergency Medicine Physician in Guthrie, Oklahoma. Licensed in Oklahoma. Registered with an NPI since 2006.

Licensed in
OK
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

200 S Academy Rd
Guthrie, OK 73044-8727 Not confirmed with CMS for 12 years — call before visiting
Phone: (405) 282-5125
Show map & directions

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

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 16492 (OK)

Record details

NPI number1659346963
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 21, 2006
Last updated in NPPESMay 20, 2014

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 patients494
Services billed 645 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.