Deborah E. Treacy, M.D.
Emergency Medicine Physician · O Fallon, IL
Deborah E. Treacy, M.D. is an emergency medicine physician with a practice address in O Fallon, Illinois, and NPI 1558391524, issued on Jul 4, 2006. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Deborah E. Treacy
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- Practice location
- 103 N Oak St, O Fallon, IL 62269
- Phone
- (618) 624-3368
- Enumerated
- Jul 4, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (618) 624-3387
- Medicare enrollment
- Enrolled (PECOS I20120321000483); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1992
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,291 in Illinois → Look up another NPI →
Also registered at 103 N Oak St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Salvador ChavezEmergency Medicine Physician1548365729
- Kathryn ClaytonEmergency Medicine Physician1952592586
- Kevin CorriganEmergency Medicine Physician1841385531
- Faron Fox, M.D.Emergency Medicine Physician1215968649
- Maria GalanosEmergency Medicine Physician1073609814
- Gregory LawsonEmergency Medicine Physician1639275977
Verify Deborah E. Treacy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional RegulationCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% more Medicare Part D claims than the average emergency medicine physician in 2024
381 Medicare Part D claims for 209 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 48 claims were for opioids.
Most prescribed
- Ondansetron Odt40 claims
- Cephalexin36 claims
- Hydrocodone-Acetaminophen32 claims
- Prednisone23 claims
- Amoxicillin-Clavulanate Potass17 claims
- Naproxen17 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Cepamerica Illinois LLPBreese, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Deborah E. Treacy among 3,291 emergency medicine physician records in Illinois
Deborah E. Treacy, M.D. is one of 3,291 emergency medicine physician records with a practice address in Illinois. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 68% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1992 · median 2012 among the 1,867 with a school on file
- Record last updated2007 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
22 emergency medicine physician records list a practice address in O Fallon
They are 22 of the 1,077 NPPES records with a practice address in O Fallon, and 3,291 emergency medicine physician records in Illinois.
All 3,291 in Illinois → Every provider in O Fallon → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Salvador ChavezO Fallon, IL 622691548365729
- Kevin CorriganO Fallon, IL 622691841385531
- Faron Fox, M.D.O Fallon, IL 622691215968649
- Maria GalanosO Fallon, IL 622691073609814
- Gregory LawsonO Fallon, IL 622691639275977
- Brian LitlandO Fallon, IL 622691225129968
- Dale Long, D.OO Fallon, IL 622691275567612
- Armand Miranda, D.O.O Fallon, IL 622691780618074
Common questions
What is Deborah E. Treacy, M.D.'s NPI number?
Deborah E. Treacy, M.D.'s National Provider Identifier (NPI) is 1558391524, issued on Jul 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Deborah E. Treacy, M.D. located?
The NPPES record lists a practice address at 103 N Oak St, O Fallon, IL, 62269. Phone: (618) 624-3368. Providers update this record themselves, so call before visiting.
How can I verify Deborah E. Treacy, M.D.'s license?
Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Deborah E. Treacy, M.D. prescribe under Medicare Part D?
In 2024, Deborah E. Treacy, M.D. had 381 Medicare Part D claims for 209 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Deborah E. Treacy, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.