Alex Steve Tosiou, M.D.
Gastroenterology Physician · Lake Forest, IL
Alex Steve Tosiou, M.D. is a gastroenterology physician with a practice address in Lake Forest, Illinois, and NPI 1184602732, issued on Jan 4, 2006. Check the license (Illinois 036093289, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Alex Steve Tosiou
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 036093289 IL
Self-reported in NPPES; status is on the state search - Practice location
- 800 N Westmoreland RD, Lake Forest, IL 60045
- Phone
- (847) 295-1300
- Enumerated
- Jan 4, 2006
- Record last updated
- Mar 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (847) 295-1574
- Medicare enrollment
- Enrolled (PECOS I20110124001162); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 887 in Illinois → Look up another NPI →
Also registered at 800 N Westmoreland RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Scott Braunlich, M.D.Internal Medicine Physician1487638904
- Kristen Coleman, NPAdult Health Nurse Practitioner1376891549
Verify Alex Steve Tosiou 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 036093289Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average gastroenterology physician in 2024
1,785 Medicare Part D claims for 732 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Omeprazole430 claims
- Sod Sulf-Potass Sulf-Mag Sulf398 claims
- Pantoprazole Sodium289 claims
- Esomeprazole Magnesium114 claims
- Famotidine68 claims
- Rabeprazole Sodium62 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 MIPS final score for 2023 (Medicare payment program): 94.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $63.13
2 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Northwestern Medical Faculty FoundationLake Forest, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alex Steve Tosiou among 887 gastroenterology physician records in Illinois
Alex Steve Tosiou, M.D. is one of 887 gastroenterology physician records with a practice address in Illinois. 85% 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 15% of them.
- NPI issued2006 · 15% of these records are older, 52% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1993 · median 2003 among the 643 with a school on file
- Record last updated2021 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Illinois
There are 887 gastroenterology physician records in Illinois.
All 887 in Illinois → Every provider in Lake Forest → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Hina Omar, MDLake Forest, IL 600451972846871
- Jamie Wabich, M.D.Lake Forest, IL 600451427324425
- Yolandra Johnson, MDKenilworth, IL 600431326030511
- Jonathan Williams, D.0.Kenilworth, IL 600431013195650
- Philip Adjei, M.D.Libertyville, IL 600481720080054
- Arkan Alrashid, M.D.Libertyville, IL 600481851348916
- Mohammad Bawani, MDLibertyville, IL 600481407858152
- Robert Hadesman, M.D.Libertyville, IL 600481245234574
Common questions
What is Alex Steve Tosiou, M.D.'s NPI number?
Alex Steve Tosiou, M.D.'s National Provider Identifier (NPI) is 1184602732, issued on Jan 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Alex Steve Tosiou, M.D. located?
The NPPES record lists a practice address at 800 N Westmoreland RD, Lake Forest, IL, 60045. Phone: (847) 295-1300. Providers update this record themselves, so call before visiting.
How can I verify Alex Steve Tosiou, M.D.'s license?
NPPES lists Illinois license number 036093289, 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.
How much does Alex Steve Tosiou, M.D. prescribe under Medicare Part D?
In 2024, Alex Steve Tosiou, M.D. had 1,785 Medicare Part D claims for 732 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Alex Steve Tosiou, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.1 of 100. 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.