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Melissa A. Hager, D.O.

NPI 1033590732ActiveIndividual· Internal Medicine, Rheumatology· Saint Louis, MO

Internal Medicine, Rheumatology (D.O.) in Saint Louis, Missouri, trained at Kansas City University of Med & Biosciences, College of Osteo Med (class of 2015). Their prescriptions cost Medicare Part D more than their services did: $3,142,434 for 4,053 claims, against $52,566 paid for services in 2024. Abbvie Inc. was the largest of 4 companies reporting payments in 2025, $167.54 in all, mostly food and beverage.

Overview

NPI1033590732
StatusActive
Entity typeIndividual
CredentialD.O.
Sole proprietorNo
NPI issuedJun 18, 2015
Last updated in NPPESOct 31, 2023
Certified by providerOct 31, 2023

Specialties and licenses

TaxonomyCodeLicenseState
Internal Medicine, Rheumatology Primary207RR0500X2018033547MO
Internal Medicine207R00000X2018033547MO

About license numbers in NPPES

Exclusion screening

ListResultDetails
HHS-OIG LEIE · Nov 10, 2026No matchChecked by NPI and by name + state
North Carolina Medicaid · Nov 11, 2026No match—
New York OMIG · Nov 11, 2026No match—
Ohio Medicaid · Nov 11, 2026No match—
Pennsylvania Medicheck · Nov 11, 2026No match—
Washington HCA · Nov 11, 2026No match—

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

Medicare

Enrollment (PECOS)Enrolled Practitioner - Rheumatology (MO)
Accepts assignmentYes (participating)

Medicare services in 2024

Medicare patients255
Services billed1,033 across 20 procedure codes
Paid by Medicare$52,566

Part D prescriptions in 2024

Prescriptions (claims)4,053 · 7,919 30-day fills
Patients588
Total drug cost$3,142,434
Generic share88% of claims

Medicare sources and data years

Education and affiliations

Medical schoolKansas City University of Med & Biosciences, College of Osteo Med
Graduation year2015
Medicare specialtyRheumatology
TelehealthOffers telehealth

Medical group

Hospital affiliations

Source: CMS Care Compare

Industry payments (Open Payments)

  • 2025$167.54 · 7 payments from 4 companies
  • 2024$99.34 · 6 payments from 2 companies

Top paying companies in 2025

CompanyAmountPayments
Abbvie Inc.$83.693
Novartis Pharmaceuticals Corporation$44.282
Lilly USA, LLC$20.901
Amgen Inc.$18.671

What the 2025 payments were for

  • Food and Beverage$167.54 · 7 payments

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

Other rheumatologists in Saint Louis

All 66 rheumatologists in Saint Louis · All rheumatologists in Missouri