Steven C. Kaiser, MD

NPI 1346219433ActiveIndividual· Internal Medicine, Gastroenterology· Mesa, AZ

Internal Medicine, Gastroenterology (MD) in Mesa, Arizona, trained at Wright State University Boonshoft School of Medicine (class of 1984). Their prescriptions cost Medicare Part D more than their services did: $816,979 for 1,847 claims, against $76,406 paid for services in 2024. Janssen Biotech, Inc. was the largest of 8 companies reporting payments in 2025, $372.21 in all, mostly food and beverage.

Overview

NPI	1346219433
Status	Active
Entity type	Individual
Credential	MD
Sole proprietor	Yes
NPI issued	Mar 14, 2006
Last updated in NPPES	Oct 31, 2011

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Gastroenterology Primary	207RG0100X	36236	AZ

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 - Gastroenterology (AZ)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	359
Services billed	762 across 25 procedure codes
Paid by Medicare	$76,406

Part D prescriptions in 2024

Prescriptions (claims)	1,847 · 3,194 30-day fills
Patients	532
Total drug cost	$816,979
Generic share	82% of claims

Medicare sources and data years

Education and affiliations

Medical school	Wright State University Boonshoft School of Medicine
Graduation year	1984
Medicare specialty	Gastroenterology
Secondary specialties	Internal Medicine