Andrew Mazulis, M.D.
Gastroenterology Physician · Libertyville, IL
Andrew Mazulis, M.D. is a gastroenterology physician with a practice address in Libertyville, Illinois, and NPI 1699031583, issued on Apr 5, 2012. Check the license (Illinois 036-135984, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Andrew Mazulis
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- 036-135984 IL
1699031583 IL
69801-20 WI
Self-reported in NPPES; status is on the state search - Practice location
- 825 S Milwaukee Ave, Libertyville, IL 60048
- Phone
- (847) 573-2845
- Enumerated
- Apr 5, 2012
- Record last updated
- Jan 5, 2024
- Medicaid ID
- 1699031583 WI
- Medicare enrollment
- Enrolled (PECOS I20160613001104); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 887 in Illinois → Look up another NPI →
Also registered at 825 S Milwaukee Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jonathan Birnberg, MDInternal Medicine Physician1477731396
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- Justin Choi, MDInternal Medicine Physician1497382196
- Tae Ho Choi, MDFamily Medicine Physician1124434477
Verify Andrew Mazulis 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 036-135984Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
25% fewer Medicare Part D claims than the average gastroenterology physician in 2024
611 Medicare Part D claims for 299 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 26% of claims.
Most prescribed
- Pantoprazole Sodium172 claims
- Peg 3350-Electrolyte119 claims
- Famotidine67 claims
- Omeprazole42 claims
- Linzess41 claims
- Cholestyramine15 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.
Industry payments in 2024: $16.58
1 payment: food and beverage; the largest payer was Abbvie 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
- Advocate Health And Hospitals CorporationLibertyville, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Andrew Mazulis among 887 gastroenterology physician records in Illinois
Andrew Mazulis, 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 2012, is newer than 69% of them.
- NPI issued2012 · 69% of these records are older, 29% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2012 · median 2003 among the 643 with a school on file
- Record last updated2024 · 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 Libertyville → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- 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
- Saad Hashmi, MDLibertyville, IL 600481326579434
- Ahmad Hassan, MDLibertyville, IL 600481033572904
- Timothy Laurie, D.O.Libertyville, IL 600481790941078
- Sean Lee, M.D.Libertyville, IL 600481194765248
Common questions
What is Andrew Mazulis, M.D.'s NPI number?
Andrew Mazulis, M.D.'s National Provider Identifier (NPI) is 1699031583, issued on Apr 5, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Andrew Mazulis, M.D. located?
The NPPES record lists a practice address at 825 S Milwaukee Ave, Libertyville, IL, 60048. Phone: (847) 573-2845. Providers update this record themselves, so call before visiting.
How can I verify Andrew Mazulis, M.D.'s license?
NPPES lists Illinois license number 036-135984, 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 Andrew Mazulis, M.D. prescribe under Medicare Part D?
In 2024, Andrew Mazulis, M.D. had 611 Medicare Part D claims for 299 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
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.