THERESA M. REGAN PH.D.
NPI 1598785644
Psychologist - Clinical in Peoria, IL
About Theresa M. Regan Ph.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
THERESA M. REGAN PH.D. (NPI 1598785644) is an individual clinical provider in Peoria, Illinois and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS, is affiliated with Saint Francis Medical Center, and is a graduate of Other (1997).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
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
Theresa M. Regan Ph.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
2Medicare enrollment records show Theresa Regan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Peoria, IL 61637
- Reassigned Medicare billing, Illinois enrollment
- 157 clinicians in this Medicare group
Peoria, IL 61615
- Reassigned Medicare billing, Illinois enrollment
- 2,944 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 3
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Saint Francis Medical Center
Acute Care Hospitals · Peoria, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 61637 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
PEORIA, IL 61637
PEORIA, IL 61637
PEORIA, IL 61637
PEORIA, IL 61637
PEORIA, IL 61637
PEORIA, IL 61637
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 Theresa Regan's NPI number?
The NPI number for Theresa Regan is 1598785644. It was assigned to this individual provider in the NPPES registry on July 20, 2006.
Where is Theresa Regan located?
Theresa Regan practices at 530 NE Glen Oak Ave, Peoria, IL 61637. The listed phone number is (309) 655-7378.
What is Theresa Regan's specialty?
The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.
Is Theresa Regan enrolled in Medicare?
Yes. Theresa Regan 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 Theresa Regan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Theresa Regan reassigns Medicare benefits to 2 organizations: Saint Francis Medical Center (Peoria, IL) and Osf Multi-Specialty Group (Peoria, IL). 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 Theresa Regan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Theresa Regan accept?
Health plans from Oscar Health list Theresa Regan 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 Theresa Regan affiliated with any hospitals?
According to CMS data, Theresa Regan is affiliated with Saint Francis Medical Center.
When was this NPI record last updated?
The NPPES record for Theresa Regan was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Theresa M. Regan, PH.D. · NPI 1598785644
Clinical provider in Peoria, Illinois. Individual provider, active in the CMS NPPES registry since July 20, 2006.
## Identity
- **NPI:** 1598785644 (Entity type: Individual)
- **Enumerated:** July 20, 2006
- **Primary specialty:** Psychologist - Clinical · taxonomy 103TC0700X
- **Sole proprietor:** No
## Practice location
- **Address:** 530 NE GLEN OAK AVE, Peoria, IL 61637-0001
- **Phone:** (309) 655-7378 · **Fax:** (309) 655-4609
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Saint Francis Medical Center (NPI 1154370195, Peoria, IL); Osf Multi-Specialty Group (NPI 1922445527, Peoria, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1997
## Record status
- **NPPES last updated:** July 8, 2007
- **Other identifiers:** Medicare UPIN S84301; Medicare ID-Type Unspecified K13113; Other 207414
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Source: [NPI Profile](https://npiprofile.com/npi/1598785644) · Data from the CMS NPPES public registry.