Clay Demattei, MD
Surgery Physician · Marion, IL
Clay Demattei, MD is a surgery physician with a practice address in Marion, Illinois, and NPI 1881621910, issued on Jun 26, 2006. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Clay Demattei
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- Practice location
- 3402 Office Park Dr., Marion, IL 62959
- Phone
- (618) 993-3221
- Enumerated
- Jun 26, 2006
- Entity
- Type 1 · individual
Verify Clay Demattei 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
11% more Medicare Part D claims than the average surgery physician in 2024
193 Medicare Part D claims for 90 beneficiaries, against an average of 174 among the 21,427 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 19 claims were for opioids.
Most prescribed
- Sucralfate29 claims
- Omeprazole25 claims
- Metoclopramide Hcl21 claims
- Hydrocodone-Acetaminophen17 claims
- Famotidine15 claims
- Cholestyramine12 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.
Surgery Physician providers in Illinois
There are 1,572 surgery physician records in Illinois.
Other surgery physician records in Illinois
- Douglas Aach, MDShiloh, IL1508817040
- John Abad, M.D.Warrenville, IL1578722336
- Andrew Abadier, DOChicago, IL1124657473
- Shabirhusain Abadin, M.D.Chicago, IL1467712596
- Mohammad Ali Abbass, MDChicago, IL1730508052
- Iftikharul Abbasy, MDOak Brook, IL1104814755
- Ariane Abcarian, M.D.Chicago, IL1831364272
- Mahmoud Abd-El-Hafez, MDSpringfield, IL1710516943
- Khaled Abdelhady, M.D.Chicago, IL1811173156
- Zaid Abdelsattar, MD, MSCMaywood, IL1760793293
Common questions
What is Clay Demattei, MD's NPI number?
Clay Demattei, MD's National Provider Identifier (NPI) is 1881621910, issued on Jun 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Clay Demattei, MD located?
The NPPES record lists a practice address at 3402 Office Park Dr., Marion, IL, 62959. Phone: (618) 993-3221. Providers update this record themselves, so call before visiting.
How can I verify Clay Demattei, MD'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 Clay Demattei, MD prescribe under Medicare Part D?
In 2024, Clay Demattei, MD had 193 Medicare Part D claims for 90 beneficiaries; the average among surgery physician prescribers was 174. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.