Isaac Ray Dennis, D.O.

NPI 1477999514ActiveIndividual· Hospitalist· Tulsa, OK

Hospitalist (D.O.) in Tulsa, Oklahoma, trained at Oklahoma State University College of Osteopathic Medicine (class of 2013). In 2024 Medicare paid $71,666 for 317 patients, and Part D covered 481 of their prescriptions, 88% of them generic. Penumbra, Inc. was the largest of 2 companies reporting payments in 2025, $186.36 in all, mostly food and beverage.

Overview

NPI	1477999514
Status	Active
Entity type	Individual
Credential	D.O.
Sole proprietor	No
NPI issued	May 16, 2013
Last updated in NPPES	Jul 31, 2017

Specialties and licenses

Taxonomy	Code	License	State
Hospitalist Primary	208M00000X	5548	OK
Internal Medicine	207R00000X	5548	OK

About license numbers in NPPES

Exclusion screening

List	Result	Details
HHS-OIG LEIE · Nov 10, 2026	No match	Checked by NPI and by name + state
North Carolina Medicaid · Nov 11, 2026	No match	—
New York OMIG · Nov 11, 2026	No match	—
Ohio Medicaid · Nov 11, 2026	No match	—
Pennsylvania Medicheck · Nov 11, 2026	No match	—
Washington HCA · Nov 11, 2026	No match	—

Official OIG search · How matching works ·Bulk check a roster

Medicare

Enrollment (PECOS)	Enrolled Practitioner - Hospitalist (OK)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	317
Services billed	866 across 11 procedure codes
Paid by Medicare	$71,666

Part D prescriptions in 2024

Prescriptions (claims)	481 · 579 30-day fills
Patients	242
Total drug cost	$28,658
Generic share	88% of claims

Medicare sources and data years

Education and affiliations

Medical school	Oklahoma State University College of Osteopathic Medicine
Graduation year	2013
Medicare specialty	Hospitalist
Secondary specialties	Internal Medicine