James J. Herdegen, MD

NPI 1184737793ActiveIndividual· Internal Medicine· Chicago, IL

Internal Medicine (MD) in Chicago, Illinois, trained at University of Chicago, Pritzker School of Medicine (class of 1986). 355 Medicare patients in 2024, $36,906 paid; nearly all of their 68 Part D prescriptions were generic (97%). Verathon Inc. was the largest of 2 companies reporting payments in 2025, $1,019 in all, mostly consulting fees.

Overview

NPI	1184737793
Status	Active
Entity type	Individual
Credential	MD
Sole proprietor	No
NPI issued	Aug 16, 2006
Last updated in NPPES	Jul 29, 2025
Certified by provider	Jul 29, 2025

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine Primary	207R00000X	036078423	IL
Internal Medicine, Critical Care Medicine	207RC0200X	75092	WI

About license numbers in NPPES

Exclusion screening

List	Result	Details
HHS-OIG LEIE · Oct 9, 2026	No match	Checked by NPI and by name + state
North Carolina Medicaid · Nov 10, 2026	No match	—
New York OMIG · Nov 10, 2026	No match	—
Ohio Medicaid · Nov 10, 2026	No match	—
Pennsylvania Medicheck · Nov 10, 2026	No match	—
Washington HCA · Nov 10, 2026	No match	—

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

Medicare

Enrollment (PECOS)	Enrolled Practitioner - Pulmonary Disease (IL); Practitioner - Critical Care (Intensivists) (WI)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	355
Services billed	605 across 14 procedure codes
Paid by Medicare	$36,906

Part D prescriptions in 2024

Prescriptions (claims)	68 · 108 30-day fills
Patients	20
Total drug cost	$1,495
Generic share	97% of claims

Medicare sources and data years

Education and affiliations

Medical school	University of Chicago, Pritzker School of Medicine
Graduation year	1986
Medicare specialty	Pulmonary Disease
Secondary specialties	Critical Care (Intensivists)
Telehealth	Offers telehealth