Josephine Jui-Yu Chiu, MD

NPI 1003983982ActiveIndividual· Internal Medicine, Nephrology· Los Angeles, CA

Internal Medicine, Nephrology (MD) in Los Angeles, California, trained at Tufts University School of Medicine (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $103,116 for 1,573 claims, against $7,078 paid for services in 2024. Ardelyx, Inc. reported $71.81 in payments in 2025, mostly food and beverage.

Overview

NPI	1003983982
Status	Active
Entity type	Individual
Credential	MD
Sole proprietor	No
NPI issued	Nov 29, 2006
Last updated in NPPES	Nov 30, 2021

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Nephrology Primary	207RN0300X	A67272	CA

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 - Internal Medicine (CA)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	38
Services billed	92 across 8 procedure codes
Paid by Medicare	$7,078

Part D prescriptions in 2024

Prescriptions (claims)	1,573 · 4,457 30-day fills
Patients	265
Total drug cost	$103,116
Generic share	93% of claims

Medicare sources and data years

Education and affiliations

Medical school	Tufts University School of Medicine
Graduation year	1997
Medicare specialty	Internal Medicine
Secondary specialties	Nephrology
Telehealth	Offers telehealth