JULIANNE TOMAC DNP, FNP-C
NPI 1245018944
Nurse Practitioner - Family in O Fallon, IL
About Julianne Tomac Dnp, Fnp-c NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JULIANNE TOMAC DNP, FNP-C (NPI 1245018944) is an individual family provider in O Fallon, Illinois, licensed in Missouri (2023037611) and active in the NPI registry since September 2023. She is enrolled in Medicare PECOS, is affiliated with St Josephs Hospital, and maintains a secondary practice location in Maryville.
NPPES Registry Identity
Specialties & Licenses
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
Julianne Tomac Dnp, Fnp-c 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 Julianne Tomac reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Maryville, IL 62062
- Reassigned Medicare billing, Illinois enrollment
- 13 clinicians in this Medicare group
Decatur, IL 62526
- Reassigned Medicare billing, Illinois enrollment
- Medicare enrollment name: Cancer Care Specialists Of Central Illinois Sc
- 36 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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
St Josephs Hospital
Acute Care Hospitals · Breese, ILHshs St Elizabeth's Hospital
Acute Care Hospitals · O Fallon, ILAnderson Hospital
Acute Care Hospitals · Maryville, ILSt Joseph's Hospital
Critical Access Hospitals · Highland, ILSparta Community Hospital
Critical Access Hospitals · Sparta, 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.
Other Providers at the Same Location NPPES 8
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
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 Julianne Tomac's NPI number?
The NPI number for Julianne Tomac is 1245018944. It was assigned to this individual provider in the NPPES registry on September 15, 2023.
Where is Julianne Tomac located?
Julianne Tomac practices at 321 Regency Park Ste 100, O Fallon, IL 62269. The listed phone number is (618) 416-7970.
What is Julianne Tomac's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Julianne Tomac enrolled in Medicare?
Yes. Julianne Tomac 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 Julianne Tomac's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Julianne Tomac reassigns Medicare benefits to 2 organizations: Mercy Clinic Specialists Services-Illinois LLC (Maryville, IL) and Cancer Care Specialists Of Central Illinois, S.C. (Decatur, 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 Julianne Tomac's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Julianne Tomac accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Anthem Blue Cross and Blue Shield and Blue Cross Blue Shield of Wyoming list Julianne Tomac 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 Julianne Tomac affiliated with any hospitals?
According to CMS data, Julianne Tomac is affiliated with St Josephs Hospital, Hshs St Elizabeth's Hospital, Anderson Hospital, St Joseph's Hospital and Sparta Community Hospital.
When was this NPI record last updated?
The NPPES record for Julianne Tomac was last updated on September 13, 2024. 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.
# Julianne Tomac, DNP, FNP-C · NPI 1245018944
Family physician in O Fallon, Illinois. Individual provider, active in the CMS NPPES registry since September 15, 2023.
## Identity
- **NPI:** 1245018944 (Entity type: Individual)
- **Enumerated:** September 15, 2023
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 2023037611 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 321 REGENCY PARK STE 100, O Fallon, IL 62269-1887
- **Phone:** (618) 416-7970 · **Fax:** (618) 416-7971
## 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): Mercy Clinic Specialists Services-Illinois LLC (NPI 1578017596, Maryville, IL); Cancer Care Specialists Of Central Illinois, S.C. (NPI 1871580142, Decatur, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2023
## Record status
- **NPPES last updated:** September 13, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1245018944) · Data from the CMS NPPES public registry.