Grace Y. Ryu, MD

NPI 1215907480ActiveIndividual· Allergy & Immunology· Columbus, OH

Allergy & Immunology (MD) in Columbus, Ohio, trained at University of Cincinnati College of Medicine (class of 1990). Their prescriptions cost Medicare Part D more than their services did: $221,429 for 1,002 claims, against $139,656 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 20 companies reporting payments in 2025, $2,247 in all, mostly food and beverage.

Overview

NPI	1215907480
Status	Active
Entity type	Individual
Credential	MD
Sole proprietor	No
NPI issued	Jan 23, 2006
Last updated in NPPES	Nov 10, 2020
Certified by provider	Nov 10, 2020

Specialties and licenses

Taxonomy	Code	License	State
Allergy & Immunology Primary	207K00000X	35-06-1986	OH

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 - Allergy/Immunology (OH)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	207
Services billed	8,793 across 25 procedure codes
Paid by Medicare	$139,656

Part D prescriptions in 2024

Prescriptions (claims)	1,002 · 1,579 30-day fills
Patients	176
Total drug cost	$221,429
Generic share	78% of claims

Medicare sources and data years

Education and affiliations

Medical school	University of Cincinnati College of Medicine
Graduation year	1990
Medicare specialty	Allergy/Immunology
Secondary specialties	Pediatric Medicine