Jack Chen, DO

NPI 1821400367ActiveIndividual· Internal Medicine, Rheumatology· Corvallis, OR

Internal Medicine, Rheumatology (DO) in Corvallis, Oregon, trained at Philadelphia College of Osteopathic Medicine (class of 2014). Their prescriptions cost Medicare Part D more than their services did: $1,516,518 for 761 claims, against $45,859 paid for services in 2024. Amgen Inc. reported $99.26 in payments in 2025, mostly food and beverage.

Overview

NPI	1821400367
Status	Active
Entity type	Individual
Credential	DO
Sole proprietor	No
NPI issued	Jun 2, 2014
Last updated in NPPES	Nov 6, 2020
Certified by provider	Nov 6, 2020

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Rheumatology Primary	207RR0500X	DO195700	OR

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 4, 2026	No match	—
New York OMIG · Nov 4, 2026	No match	—
Ohio Medicaid · Nov 4, 2026	No match	—
Pennsylvania Medicheck · Nov 4, 2026	No match	—
Washington HCA · Nov 4, 2026	No match	—

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

Medicare

Enrollment (PECOS)	Enrolled Practitioner - Rheumatology (WA)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	160
Services billed	402 across 9 procedure codes
Paid by Medicare	$45,859

Part D prescriptions in 2024

Prescriptions (claims)	761 · 1,102 30-day fills
Patients	173
Total drug cost	$1,516,518
Generic share	69% of claims

Medicare sources and data years

Education and affiliations

Medical school	Philadelphia College of Osteopathic Medicine
Graduation year	2014
Medicare specialty	Rheumatology
Secondary specialties	Internal Medicine
Telehealth	Offers telehealth