Hien Huy Nguyen, MD

NPI 1811974843ActiveIndividual· Internal Medicine, Infectious Disease· Sacramento, CA

Internal Medicine, Infectious Disease (MD) in Sacramento, California, trained at University of California, Geffen School of Medicine (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $151,597 for 238 claims, against $21,228 paid for services in 2024. La Jolla Pharmaceutical Company reported $131.58 in payments in 2025, mostly food and beverage.

Overview

NPI	1811974843
Status	Active
Entity type	Individual
Credential	MD
Sole proprietor	Yes
NPI issued	Dec 30, 2005
Last updated in NPPES	Apr 14, 2008

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Infectious Disease Primary	207RI0200X	A66151	CA
Internal Medicine	207R00000X	A66151	CA
Hospitalist	208M00000X	A66151	CA

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 - Infectious Disease (CA)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	163
Services billed	305 across 23 procedure codes
Paid by Medicare	$21,228

Part D prescriptions in 2024

Prescriptions (claims)	238 · 369 30-day fills
Patients	50
Total drug cost	$151,597
Generic share	74% of claims

Medicare sources and data years

Education and affiliations

Medical school	University of California, Geffen School of Medicine
Graduation year	1997
Medicare specialty	Infectious Disease
Secondary specialties	Internal Medicine
Telehealth	Offers telehealth