Ronald Arnold Pacis, DO

NPI 1316039936ActiveIndividual· Internal Medicine, Cardiovascular Disease· Lansing, MI

Internal Medicine, Cardiovascular Disease (DO) in Lansing, Michigan, trained at At Still University of Health Sciences, College of Osteo Med, Kirksville (class of 2001). Their prescriptions cost Medicare Part D more than their services did: $1,150,971 for 4,024 claims, against $70,819 paid for services in 2024. Medtronic, Inc. reported $83.46 in payments in 2025, mostly food and beverage.

Overview

NPI	1316039936
Status	Active
Entity type	Individual
Credential	DO
Sole proprietor	No
NPI issued	Sep 29, 2006
Last updated in NPPES	Jul 21, 2014

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Cardiovascular Disease Primary	207RC0000X	5101015144	MI

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 - Cardiovascular Disease (Cardiology) (MI)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	1,299
Services billed	2,401 across 46 procedure codes
Paid by Medicare	$70,819

Part D prescriptions in 2024

Prescriptions (claims)	4,024 · 9,978 30-day fills
Patients	691
Total drug cost	$1,150,971
Generic share	74% of claims

Medicare sources and data years

Education and affiliations

Medical school	At Still University of Health Sciences, College of Osteo Med, Kirksville
Graduation year	2001
Medicare specialty	Cardiovascular Disease (Cardiology)
Secondary specialties	Internal Medicine