Ernie Riffer, MD

NPI 1134284268ActiveIndividual· Internal Medicine· Phoenix, AZ

Internal Medicine (MD) in Phoenix, Arizona, trained at University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) (class of 1986). Their prescriptions cost Medicare Part D more than their services did: $764,749 for 8,762 claims, against $79,355 paid for services in 2024. Ucb, Inc. reported $124.38 in payments in 2025, mostly food and beverage.

Overview

NPI	1134284268
Status	Active
Entity type	Individual
Credential	MD
Sole proprietor	No
NPI issued	Dec 27, 2006
Last updated in NPPES	Dec 5, 2023
Certified by provider	Dec 5, 2023

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine Primary	207R00000X	17480	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 - Internal Medicine (AZ)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	345
Services billed	993 across 35 procedure codes
Paid by Medicare	$79,355

Part D prescriptions in 2024

Prescriptions (claims)	8,762 · 21,654 30-day fills
Patients	753
Total drug cost	$764,749
Generic share	87% of claims

Medicare sources and data years

Education and affiliations

Medical school	University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb)
Graduation year	1986
Medicare specialty	Internal Medicine
Telehealth	Offers telehealth