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Michael Keith Ackerman, D.O.

NPI 1174687917ActiveIndividual· Internal Medicine· Warrenton, VA

Internal Medicine (D.O.) in Warrenton, Virginia, trained at University of New England, College of Osteo Medicine (class of 1996). Their prescriptions cost Medicare Part D more than their services did: $829,571 for 7,534 claims, against $95,657 paid for services in 2024. Argenx US, Inc. was the largest of 4 companies reporting payments in 2025, $15,069 in all, mostly consulting fees.

Overview

NPI1174687917
StatusActive
Entity typeIndividual
CredentialD.O.
Sole proprietorNo
NPI issuedDec 19, 2006
Last updated in NPPESMar 18, 2014

Specialties and licenses

TaxonomyCodeLicenseState
Internal Medicine Primary207R00000X0102050260VA

About license numbers in NPPES

Exclusion screening

ListResultDetails
HHS-OIG LEIE · Oct 9, 2026No matchChecked by NPI and by name + state
North Carolina Medicaid · Nov 10, 2026No match—
New York OMIG · Nov 10, 2026No match—
Ohio Medicaid · Nov 10, 2026No match—
Pennsylvania Medicheck · Nov 10, 2026No match—
Washington HCA · Nov 10, 2026No match—

Official OIG search · How matching works ·Bulk check a roster

Medicare

Enrollment (PECOS)Enrolled Practitioner - Internal Medicine (VA)
Accepts assignmentYes (participating)

Medicare services in 2024

Medicare patients412
Services billed1,329 across 37 procedure codes
Paid by Medicare$95,657

Part D prescriptions in 2024

Prescriptions (claims)7,534 · 15,905 30-day fills
Patients500
Total drug cost$829,571
Generic share86% of claims

Medicare sources and data years

Education and affiliations

Medical schoolUniversity of New England, College of Osteo Medicine
Graduation year1996
Medicare specialtyInternal Medicine

Medical group

Hospital affiliations

Other facilities

Source: CMS Care Compare

Industry payments (Open Payments)

  • 2025$15,069 · 29 payments from 4 companies
  • 2024$37.19 · 2 payments from 2 companies

Top paying companies in 2025

CompanyAmountPayments
Argenx US, Inc.$13,73315
Abbott Laboratories$1,25310
Amgen Inc.$54.123
Pfizer Inc.$28.671

What the 2025 payments were for

  • Consulting Fee$11,813 · 2 payments
  • Travel and Lodging$2,501 · 13 payments
  • Food and Beverage$755.49 · 14 payments

Receiving payments does not imply wrongdoing. What Open Payments covers ·original records

Other Internal Medicine providers in Warrenton

All Internal Medicine providers in Virginia →