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

Individual provider Emergency Medicine Physician · NPI 1104405869

Nathan Klammer, MD practises Emergency Medicine in Tulsa, Oklahoma. Graduated from University of Arkansas College of Medicine in 2021, 5 years ago. Practices with Creek Nation Hospital and Clinics, a 390-clinician group and accepts Medicare assignment. Licensed in Oklahoma.

Years since qualifying
5
Trained at
University of Arkansas College of Medicine
Licensed in
OK
In the registry since
2021
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

1145 S Utica Ave Ste 365
Tulsa, OK 74104-4004
Phone: (918) 728-3354
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 42931 (OK)

Record details

NPI number1104405869
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 7, 2021
Last updated in NPPESApril 9, 2025
Certification dateApril 9, 2025

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolUNIVERSITY OF ARKANSAS COLLEGE OF MEDICINE
Graduated 2021 (5 years in practice)
Group practice Creek Nation Hospital And Clinics — 390 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 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 patients161
Services billed 251 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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 Creek Nation Hospital and Clinics

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 390 clinicians in the practice; 12 are shown here.

Other providers in Tulsa