Doctor profile · Federal record

Dr. Julianne Tomac, DNP, FNP-C

Family Nurse Practitioner (CMS: Nurse Practitioner) · O Fallon, IL

  • NPI 1245018944
  • Accepts Medicare
  • 3 yrs in practice
  • Female
  • Group practice
  • No sanctions

Practice & contact

Operates at 2 locations .

NPPES Updated May 11, 2026
Primary practice
321 Regency Park Ste 100
O Fallon, IL 622691887
(618) 416-7970
fax (618) 416-7971
Additional location
2227 Vadalabene Dr
Maryville, IL 620625823
(618) 288-1140
Mailing address
Po Box 25228
Decatur, IL 625255228

Credentials & registration

NPPES · NUCC
NPI registered
September 2023 — 3 yrs on file
Profile last updated
September 13, 2024
Year of graduation
2023 — 3 yrs since
Specialty taxonomy
363LF0000X — NUCC code
State license (1)
Missouri #2023037611

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1245018944. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
31
Distinct HCPCS
2
Medicare allowed
$4,340
HCPCS Description Services Patients Avg allowed
99214 Established patient office or other outpatient visit, 30-39 minutes 18 18 $107
99205 New patient office or other outpatient visit, 60-74 minutes 13 13 $186

In context: peer comparison

Among 12 peers in O Fallon Family Nurse Practitioner, average services per provider: 51. This provider delivers 0.6× the peer median.

Open Payments

Industry payments received

CMS Open Payments
All-time total
$1,326
Transactions
57
Manufacturers
15
Payer (manufacturer) Industry Txns Amount
Janssen Biotech, INC. 14 $268.44
Novartis Pharmaceuticals Corporation 8 $141.79
Incyte Corporation 6 $105.07
Daiichi Sankyo INC. 4 $94.67
Regeneron Healthcare Solutions, INC. 3 $71.02
Celgene Corporation 4 $64.71
Sobi, INC 3 $64.19
Jazz Pharmaceuticals INC. 2 $63.01
Abbvie INC. 2 $48.06
Merck Sharp & Dohme LLC 3 $47.39
Pfizer INC. 2 $43.93
Tempus Ai, INC 2 $40.54
AstraZeneca Pharmaceuticals Lp 2 $33.82
Genentech USA, INC. 1 $31.67
Genmab U.S., INC. 1 $27.51

By nature of payment

Food and Beverage
$1,326

Frequently asked questions

Auto-generated from federal data
What is Dr. Julianne Tomac's medical specialty?
Dr. Julianne Tomac practices Family Nurse Practitioner in O Fallon, IL.
Where does Dr. Julianne Tomac practice?
Dr. Julianne Tomac practices at 321 Regency Park Ste 100, O Fallon, IL 622691887. Office phone: 6184167970.
What is Dr. Julianne Tomac's NPI?
Dr. Julianne Tomac's National Provider Identifier (NPI) is 1245018944, issued by NPPES.
Does Dr. Julianne Tomac accept Medicare assignment?
Yes. Dr. Julianne Tomac accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Julianne Tomac commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); New patient office or other outpatient visit (HCPCS 99205). Source: CMS Medicare Physician & Other Practitioners file.