Mark Irwin, M.D.
Internal Medicine Physician · Belleville, IL
Mark Irwin, M.D. is an internal medicine physician with a practice address in Belleville, Illinois, and NPI 1366433567, issued on Nov 4, 2005. Check the license (Illinois 336-023425, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark Irwin
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 336-023425 IL
Self-reported in NPPES; status is on the state search - Practice location
- 2900 Frank Scott Pkwy W, Belleville, IL 62223
- Phone
- (618) 234-0640
- Enumerated
- Nov 4, 2005
- Record last updated
- Sep 21, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (314) 851-4475
- Medicaid ID
- 036058840 IL
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 2900 Frank Scott Pkwy W
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christina Anshus, DCChiropractor1134168552
- Diana Appleton, MSWClinical Social Worker1467423426
- Edgar Breda, D.D.S.Oral and Maxillofacial Surgery (Dentist)1497742407
- Jeffrey Chalfant, DOPsychiatry Physician1811935166
- Stephen Clement, R.PH.Pharmacist1477667848
- Scott Dorrity, DCChiropractor1407895824
Verify Mark Irwin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 336-023425Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mark Irwin among 7,238 internal medicine physician records in Illinois
Mark Irwin, M.D. is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileNo · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2012 · 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 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
27 internal medicine physician records list a practice address in Belleville
They are 27 of the 1,404 NPPES records with a practice address in Belleville, and 7,238 internal medicine physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 7,238 in Illinois → Every provider in Belleville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jawad Khan, M.D.Belleville, IL 622231336273119
- Elizabeth Stewart, M.D.Belleville, IL 622231508848490
- Eldon Trame, M.D.Belleville, IL 622231033192299
- Jon Elliott Brubaker, MDScott Afb, IL 622251265062178
- Adam Derrickson, M.D.Scott Afb, IL 622251265525414
- Matthew Hageman, MDBelleville, IL 622211376540930
- Dennis Larson, M.D.Belleville, IL 622211003096140
- Kenneth McDonnell, M.D.Scott Afb, IL 622251457346314
Common questions
What is Mark Irwin, M.D.'s NPI number?
Mark Irwin, M.D.'s National Provider Identifier (NPI) is 1366433567, issued on Nov 4, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark Irwin, M.D. located?
The NPPES record lists a practice address at 2900 Frank Scott Pkwy W, Belleville, IL, 62223. Phone: (618) 234-0640. Providers update this record themselves, so call before visiting.
How can I verify Mark Irwin, M.D.'s license?
NPPES lists Illinois license number 336-023425, as entered by the provider. 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.