Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Rheumatology

Melissa A. Hager, DO

Works at hospitals in Saint Louis, MO · Saint Peters, MO · Belleville, IL … · Missouri, Illinois

Summary

Melissa A. Hager, DO (Rheumatology) is listed by Medicare at 5 hospitals in Saint Louis, MO, Saint Peters, MO and Belleville, IL and other places. NPI 1033590732. Medicare data says the clinician accepts Medicare assignment. Source: CMS Facility Affiliation Data, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about Melissa A. Hager, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

RheumatologyPrimary specialty
YesAccepts Medicare assignment
YesOffers telehealth
11Years since medical school (graduated 2015)
Kansas City University Of Med & Biosciences, College Of Osteo MedMedical school
FemaleGender (as listed)
Physician Groups LCGroup practice

Quick answers

Which hospitals does Melissa A. Hager work at?
Medicare's official clinician data lists Melissa A. Hager at 5 hospitals: Barnes Jewish Hospital, Barnes-Jewish St Peters Hospital, Memorial Hospital, Missouri Baptist Medical Center and Parkland Health Center. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Melissa A. Hager see patients?
Medicare's clinician data lists 3 practice locations, including Saint Louis, MO and O Fallon, MO. Call before your visit to confirm the address.
What is Melissa A. Hager's specialty?
Medicare lists Rheumatology as the primary specialty.
Does Melissa A. Hager accept Medicare assignment?
Yes. Medicare's clinician data says Melissa A. Hager accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
Does Melissa A. Hager offer telehealth?
Medicare's clinician data says Melissa A. Hager offers telehealth services. Ask the office which visits can be done by video or phone.
What is the phone number for Melissa A. Hager?
(314) 273-0195, as listed in official Medicare / NPI Registry data.
What is Melissa A. Hager's NPI number?
1033590732. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Melissa A. Hager works

Medicare's Facility Affiliation Data lists Melissa A. Hager at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.

Practice locations

Addresses where Melissa A. Hager is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Melissa A. Hager as a member of this group (CMS data updated 2026-10-02).

  • Physician Groups LC521 clinicians in the group

Specialties

Find other Rheumatology doctors in Missouri →

Other rheumatologists in Saint Louis

Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.

All rheumatologists in Saint Louis →

Clinician information

CredentialDO
Medical schoolKansas City University Of Med & Biosciences, College Of Osteo Med
Graduation year2015
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1033590732
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
  2. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians