DORRIE C TREDWAY MD
NPI 1891787040
Family Medicine in O Fallon, IL
About Dorrie C Tredway Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DORRIE C TREDWAY MD (NPI 1891787040) is an individual family medicine provider in O Fallon, Illinois, licensed in Illinois (036108951) and active in the NPI registry since August 2005. She is enrolled in Medicare PECOS, is affiliated with St Johns Hospital, and is a graduate of Rush Medical College Of Rush University (2000).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 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
Dorrie C Tredway Md 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 Reassignment
Medicare enrollment records show Dorrie Tredway reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Pana, IL 62557
- Reassigned Medicare billing, Illinois enrollment
- Medicare enrollment name: Hshs Medical Group Inc
- 317 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 9
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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
St Johns Hospital
Acute Care Hospitals · Springfield, ILMemorial Hospital
Acute Care Hospitals · Belleville, ILHshs St Elizabeth's Hospital
Acute Care Hospitals · O Fallon, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 62269 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 18
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
O FALLON, IL 62269
O FALLON, IL 62269
O FALLON, IL 62269
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 Dorrie Tredway's NPI number?
The NPI number for Dorrie Tredway is 1891787040. It was assigned to this individual provider in the NPPES registry on August 15, 2005. The provider is also known as Dorrie C Cappelletti MD.
Where is Dorrie Tredway located?
Dorrie Tredway practices at 1512 N Green Mount Rd Suite 108, O Fallon, IL 62269. The listed phone number is (618) 624-5510.
What is Dorrie Tredway's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Dorrie Tredway enrolled in Medicare?
Yes. Dorrie Tredway 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 organization bills Medicare for Dorrie Tredway's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Dorrie Tredway reassigns Medicare benefits to Sjl Health Systems Inc (Pana, IL). The 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 Dorrie Tredway's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Dorrie Tredway accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Medica and UnitedHealthcare list Dorrie Tredway 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 Dorrie Tredway affiliated with any hospitals?
According to CMS data, Dorrie Tredway is affiliated with St Johns Hospital, Memorial Hospital and Hshs St Elizabeth's Hospital.
When was this NPI record last updated?
The NPPES record for Dorrie Tredway was last updated on December 20, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Dorrie C Tredway, MD · NPI 1891787040
Family Medicine physician in O Fallon, Illinois. Individual provider, active in the CMS NPPES registry since August 15, 2005.
## Identity
- **NPI:** 1891787040 (Entity type: Individual)
- **Enumerated:** August 15, 2005
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 036108951 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 1512 N GREEN MOUNT RD, SUITE 108, O Fallon, IL 62269-2083
- **Phone:** (618) 624-5510 · **Fax:** (618) 624-5529
## 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:** Sjl Health Systems Inc (NPI 1215037353, Pana, IL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Rush Medical College Of Rush University, class of 2000
## Record status
- **NPPES last updated:** December 20, 2021
- **Other identifiers:** Other 156490007 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1891787040) · Data from the CMS NPPES public registry.