Clay Demattei, MD
NPI 1881621910 · Surgery Physician · Marion, IL
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Clay Demattei, MD is a Surgery Physician provider in Marion, IL (NPI 1881621910).
Provider details
- NPI number
- 1881621910
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036072552 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
380 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 83 | $87 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 66 | $107 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 62 | $161 |
| Diagnostic Exam of Large Bowel Using a Flexible Endoscope45378 | 38 | $176 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 32 | $51 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sucralfate | 29 | — |
| Omeprazole | 25 | 13 |
| Metoclopramide Hcl | 21 | — |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 17 | 16 |
| Famotidine | 15 | — |
| Cholestyramine (with Sugar)brand: Cholestyramine | 12 | — |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-26
- Last updated
- 2021-01-05
- Certified
- 2021-01-05
Frequently asked questions
- What is Clay Demattei's NPI number?
- Clay Demattei's National Provider Identifier (NPI) is 1881621910, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Clay Demattei's specialty?
- Clay Demattei is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Clay Demattei located?
- Clay Demattei's practice location on file with NPPES is 3402 Office Park Dr., Marion, IL 62959.
- What is Clay Demattei's phone number?
- The practice phone number listed in the NPPES registry for Clay Demattei is (618) 993-3221.
- Does Clay Demattei accept Medicare?
- Clay Demattei is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Clay Demattei's NPI active?
- Yes — Clay Demattei's NPI (1881621910) is active in the NPPES registry as of the last update on 2021-01-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.