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

John Gemma

Individual provider Internal Medicine Physician · NPI 1750791760

John Gemma practises Internal Medicine in Tulsa, Oklahoma. Qualified in 2014, 12 years ago. Practices with Tulsa Hospital Medicine Physicians Group, LLC, a 132-clinician group and accepts Medicare assignment. Licensed in Oklahoma.

Years since qualifying
12
Licensed in
OK
In the registry since
2014
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Practice location Address checks out

4502 E 41st St
Tulsa, OK 74135-2536
Phone: (918) 619-4400
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 5744 (OK)

Record details

NPI number1750791760
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorYes
NPI enumeratedApril 29, 2014
Last updated in NPPESJune 27, 2017

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2014 (12 years in practice)
Group practice Tulsa Hospital Medicine Physicians Group, Llc — 132 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
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 patients142
Services billed 361 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.

Colleagues at Tulsa Hospital Medicine Physicians Group, LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 132 clinicians in the practice; 12 are shown here.

Other providers in Tulsa