Steven Young Ko, MD

NPI 1194135780ActiveIndividual· Internal Medicine· Fontana, CA

Internal Medicine (MD) in Fontana, California, trained at Virginia Commonwealth University, School of Medicine (class of 2014). Mostly services rather than prescriptions: Medicare paid $36,553 for 125 patients in 2024, with only 23 Part D claims. Intuitive Surgical, Inc. was the largest of 2 companies reporting payments in 2025, $2,151 in all, mostly education.

Overview

NPI	1194135780
Status	Active
Entity type	Individual
Credential	MD
Sole proprietor	No
NPI issued	May 5, 2014
Last updated in NPPES	Mar 24, 2016

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine Primary	207R00000X	141088	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 - Pulmonary Disease (CA)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	125
Services billed	220 across 7 procedure codes
Paid by Medicare	$36,553

Part D prescriptions in 2024

Prescriptions (claims)	23 · 54 30-day fills
Total drug cost	$213.54
Generic share	96% of claims

Medicare sources and data years

Education and affiliations

Medical school	Virginia Commonwealth University, School of Medicine
Graduation year	2014
Medicare specialty	Pulmonary Disease
Secondary specialties	Critical Care (Intensivists), Internal Medicine