Adam Klugman, MD

NPI 1588630669ActiveIndividual· Internal Medicine, Gastroenterology· Naperville, IL

Internal Medicine, Gastroenterology (MD) in Naperville, Illinois, trained at University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $791,583 for 1,354 claims, against $133,373 paid for services in 2024. Abbvie Inc. was the largest of 2 companies reporting payments in 2025, $266.98 in all, mostly food and beverage.

Overview

NPI	1588630669
Status	Active
Entity type	Individual
Credential	MD
Sole proprietor	No
NPI issued	Feb 27, 2006
Last updated in NPPES	Aug 9, 2023
Certified by provider	Aug 9, 2023

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Gastroenterology Primary	207RG0100X	036083302	IL

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 (IL)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	553
Services billed	1,310 across 72 procedure codes
Paid by Medicare	$133,373

Part D prescriptions in 2024

Prescriptions (claims)	1,354 · 2,842 30-day fills
Patients	608
Total drug cost	$791,583
Generic share	81% 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	1989
Medicare specialty	Gastroenterology
Telehealth	Offers telehealth