Ryan Matthew Casper, MD

NPI 1306898846ActiveIndividual· Allergy & Immunology· Peoria, AZ

Allergy & Immunology (MD) in Peoria, Arizona, trained at Medical College of Wisconsin (class of 2001). Their prescriptions cost Medicare Part D more than their services did: $1,622,950 for 2,059 claims, against $445,147 paid for services in 2024. Csl Behring was the largest of 27 companies reporting payments in 2025, $4,036 in all, mostly food and beverage.

Overview

NPI	1306898846
Status	Active
Entity type	Individual
Credential	MD
Sole proprietor	No
NPI issued	May 16, 2006
Last updated in NPPES	Jul 1, 2019

Specialties and licenses

Taxonomy	Code	License	State
Allergy & Immunology Primary	207K00000X	36886	AZ
Pediatrics, Pediatric Allergy/Immunology	2080P0201X	46975	WI

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

Medicare services in 2024

Medicare patients	778
Services billed	29,219 across 39 procedure codes
Paid by Medicare	$445,147

Part D prescriptions in 2024

Prescriptions (claims)	2,059 · 3,043 30-day fills
Patients	392
Total drug cost	$1,622,950
Generic share	59% of claims

Medicare sources and data years

Education and affiliations

Medical school	Medical College of Wisconsin
Graduation year	2001
Medicare specialty	Allergy/Immunology
Secondary specialties	Pediatric Medicine
Telehealth	Offers telehealth