DR. MATTHEW TREASTER M.D.
NPI 1447456215
Emergency Medicine in Saint Louis, MO
About Dr. Matthew Treaster M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MATTHEW TREASTER M.D. (NPI 1447456215) is an individual emergency medicine provider in Saint Louis, Missouri, licensed in Missouri (2009036610) and active in the NPI registry since June 2007. He is enrolled in Medicare PECOS, is affiliated with Ssm Health St Mary's Hospital -centralia, and is a graduate of University Of Missouri, Kansas City, School Of Medicine (2007).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
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. Matthew Treaster M.d. 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
9Medicare enrollment records show Matthew Treaster reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Louis, MO 63110
- Reassigned Medicare billing, Missouri enrollment
- 194 clinicians in this Medicare group
Saint Louis, MO 63104
- Reassigned Medicare billing, Missouri enrollment
- 1,294 clinicians in this Medicare group
Cahokia Heights, IL 62207
- Reassigned Medicare billing, Illinois enrollment
- 68 clinicians in this Medicare group
Chesterfield, MO 63017
- Reassigned Medicare billing, Missouri enrollment
- Medicare enrollment name: Emergency Physicians Of St Lukes LLC
- 124 clinicians in this Medicare group
Staunton, IL 62088
- Reassigned Medicare billing, Illinois enrollment
- 121 clinicians in this Medicare group
Sparta, IL 62286
- Reassigned Medicare billing, Illinois enrollment
- 67 clinicians in this Medicare group
Centralia, IL 62801
- Reassigned Medicare billing, Illinois enrollment
- 69 clinicians in this Medicare group
Mount Vernon, IL 62864
- Reassigned Medicare billing, Illinois enrollment
- 81 clinicians in this Medicare group
Grand Island, NE 68803
- Reassigned Medicare billing, Nebraska enrollment
- 58 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 6
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.
Ssm Health St Mary's Hospital -Centralia
Acute Care Hospitals · Centralia, ILGood Samaritan Regional Hlth Center
Acute Care Hospitals · Mount Vernon, ILCommunity Hospital Of Staunton
Critical Access Hospitals · Staunton, ILSparta Community Hospital
Critical Access Hospitals · Sparta, ILSsm Health Saint Louis University Hospital
Acute Care Hospitals · Saint Louis, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63110 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
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 Matthew Treaster's NPI number?
The NPI number for Matthew Treaster is 1447456215. It was assigned to this individual provider in the NPPES registry on June 26, 2007.
Where is Matthew Treaster located?
Matthew Treaster practices at 660 S Euclid Ave Campus Box 8072, Saint Louis, MO 63110. The listed phone number is (314) 362-9177.
What is Matthew Treaster's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Matthew Treaster enrolled in Medicare?
Yes. Matthew Treaster 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 Matthew Treaster's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Matthew Treaster reassigns Medicare benefits to 9 organizations: Slh Physicians LLC (Saint Louis, MO), Ssm Health Care Group (Saint Louis, MO), Touchette Regional Hospital Inc (Cahokia Heights, IL), Emergency Physicians Of St. Luke's, LLC (Chesterfield, MO), Midwest Emergency Anderson Health, Inc (Staunton, IL) and 4 more organizations, listed in the Medicare section above. 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 Matthew Treaster's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Matthew Treaster accept?
Health plans from Oscar Insurance Company list Matthew Treaster 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 Matthew Treaster affiliated with any hospitals?
According to CMS data, Matthew Treaster is affiliated with Ssm Health St Mary's Hospital -Centralia, Good Samaritan Regional Hlth Center, Community Hospital Of Staunton, Sparta Community Hospital and Ssm Health Saint Louis University Hospital.
When was this NPI record last updated?
The NPPES record for Matthew Treaster was last updated on July 6, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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. Matthew Treaster, M.D. · NPI 1447456215
Emergency Medicine physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since June 26, 2007.
## Identity
- **NPI:** 1447456215 (Entity type: Individual)
- **Enumerated:** June 26, 2007
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 2009036610 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 660 S EUCLID AVE, CAMPUS BOX 8072, Saint Louis, MO 63110-1010
- **Phone:** (314) 362-9177 · **Fax:** (314) 362-0478
## 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:** 9 organizations under Medicare reassignment (form CMS-855R): Slh Physicians LLC (NPI 1881668051, Saint Louis, MO); Ssm Health Care Group (NPI 1306589544, Saint Louis, MO); Touchette Regional Hospital Inc (NPI 1922019926, Cahokia Heights, IL); Emergency Physicians Of St. Luke's, LLC (NPI 1215359815, Chesterfield, MO); Midwest Emergency Anderson Health, Inc (NPI 1710647615, Staunton, IL); and 4 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Missouri, Kansas City, School Of Medicine, class of 2007
## Record status
- **NPPES last updated:** July 6, 2010
- **Other identifiers:** Medicare PIN 132100017 (MO); Medicaid 1447456215 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1447456215) · Data from the CMS NPPES public registry.