Aaron Timothy Althaus, MD

NPI 1518195619ActiveIndividual· Orthopaedic Surgery· Dakota Dunes, SD

Orthopaedic Surgery (MD) in Dakota Dunes, South Dakota, trained at University of Iowa, Rj & L Carver College of Medicine (class of 2009). 564 Medicare patients in 2024, $221,115 paid; nearly all of their 546 Part D prescriptions were generic (99%). Stryker Corporation reported $99.34 in payments in 2024, mostly food and beverage.

Overview

NPI	1518195619
Status	Active
Entity type	Individual
Credential	MD
Sole proprietor	No
NPI issued	Jun 26, 2009
Last updated in NPPES	Dec 10, 2025
Certified by provider	Dec 10, 2025

Specialties and licenses

Taxonomy	Code	License	State
Orthopaedic Surgery Primary	207X00000X	11279	SD
Orthopaedic Surgery	207X00000X	31149	NE
Orthopaedic Surgery	207X00000X	94-07232	KS
Orthopaedic Surgery	207X00000X	MD-42778	IA

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 - Orthopedic Surgery (IA); Practitioner - Orthopedic Surgery (NE); Practitioner - Orthopedic Surgery (SD)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	564
Services billed	5,368 across 64 procedure codes
Paid by Medicare	$221,115

Part D prescriptions in 2024

Prescriptions (claims)	546 · 561 30-day fills
Patients	213
Total drug cost	$4,560
Generic share	99% of claims

Medicare sources and data years

Education and affiliations

Medical school	University of Iowa, Rj & L Carver College of Medicine
Graduation year	2009
Medicare specialty	Orthopedic Surgery
Secondary specialties	Sports Medicine