DR. MELISSA A HAGER D.O.
NPI 1033590732
Internal Medicine - Rheumatology in Saint Louis, MO
About Dr. Melissa A Hager D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MELISSA A HAGER D.O. (NPI 1033590732) is an individual rheumatology provider in Saint Louis, Missouri, licensed in Missouri (2018033547) and active in the NPI registry since June 2015. She is enrolled in Medicare PECOS, is affiliated with Memorial Hospital, and maintains a secondary practice location in Saint Louis.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Melissa A Hager D.o. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Melissa Hager reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 611 clinicians in this Medicare group
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 8 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 8
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Memorial Hospital
Acute Care Hospitals · Belleville, ILBarnes Jewish Hospital
Acute Care Hospitals · Saint Louis, MOMissouri Baptist Medical Center
Acute Care Hospitals · Town And Country, MOParkland Health Center
Acute Care Hospitals · Farmington, MOBarnes-Jewish St Peters Hospital
Acute Care Hospitals · Saint Peters, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63131 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Melissa Hager's NPI number?
The NPI number for Melissa Hager is 1033590732. It was assigned to this individual provider in the NPPES registry on June 18, 2015.
Where is Melissa Hager located?
Melissa Hager practices at 3023 N Ballas Rd Ste 500D, Saint Louis, MO 63131. The listed phone number is (314) 996-7930.
What is Melissa Hager's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.
Is Melissa Hager enrolled in Medicare?
Yes. Melissa Hager is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Melissa Hager's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Melissa Hager reassigns Medicare benefits to 2 organizations: Physician Groups Lc (Saint Louis, MO) and Arthritis Consultants Inc. (Saint Louis, MO). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Melissa Hager's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Melissa Hager accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 2 other insurers list Melissa Hager as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Melissa Hager affiliated with any hospitals?
According to CMS data, Melissa Hager is affiliated with Memorial Hospital, Barnes Jewish Hospital, Missouri Baptist Medical Center, Parkland Health Center and Barnes-Jewish St Peters Hospital.
When was this NPI record last updated?
The NPPES record for Melissa Hager was last updated on October 31, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Melissa A Hager, D.O. · NPI 1033590732
Rheumatology physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since June 18, 2015.
## Identity
- **NPI:** 1033590732 (Entity type: Individual)
- **Enumerated:** June 18, 2015
- **Primary specialty:** Internal Medicine - Rheumatology · taxonomy 207RR0500X
- **State license:** 2018033547 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 3023 N BALLAS RD STE 500D, Saint Louis, MO 63131-2359
- **Phone:** (314) 996-7930
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Physician Groups Lc (NPI 1285664268, Saint Louis, MO); Arthritis Consultants Inc. (NPI 1770544066, Saint Louis, MO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Kansas City University Of Med & Biosciences, College Of Osteo Med, class of 2015
## Record status
- **NPPES last updated:** October 31, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1033590732) · Data from the CMS NPPES public registry.