Harold Mozwecz, MD
Gastroenterology Physician · Naperville, IL
Harold Mozwecz, MD is a gastroenterology physician with a practice address in Naperville, Illinois, and NPI 1356318349, issued on Mar 8, 2006. Check the license (Illinois 036075083, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Harold Mozwecz
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 036075083 IL
Self-reported in NPPES; status is on the state search - Practice location
- 100 Spalding Dr, Naperville, IL 60540
- Phone
- (630) 717-2600
- Enumerated
- Mar 8, 2006
- Record last updated
- Jan 19, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 036075083 IL
- Medicare enrollment
- Enrolled (PECOS I20040122000319); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1985
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 887 in Illinois → Look up another NPI →
Also registered at 100 Spalding Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shahid Ahsan, M.D.Pulmonary Disease Physician1740208180
- Rafi Ali, M.D.Gastroenterology Physician1437136454
- Fariborze Barhamand, MDHematology & Oncology Physician1093810491
- Sharon Cline, M.D.Cardiovascular Disease Physician1588750327
- Michael Coffel, FNP-BCFamily Nurse Practitioner1275795866
- Mark Daniels, M.D.Gastroenterology Physician1043215718
Verify Harold Mozwecz 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 036075083Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
41% more Medicare Part D claims than the average gastroenterology physician in 2024
1,143 Medicare Part D claims for 539 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
- Pantoprazole Sodium312 claims
- Gavilyte-G159 claims
- Dicyclomine Hcl98 claims
- Peg-3350 And Electrolytes88 claims
- Peg 3350-Electrolyte86 claims
- Omeprazole78 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: $34.28
1 payment: 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
- Dupage Medical Group LtdNaperville, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Harold Mozwecz among 887 gastroenterology physician records in Illinois
Harold Mozwecz, MD 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
- Graduated1985 · 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 Naperville → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- James Abraham, MDNaperville, IL 605401427276732
- Rafi Ali, M.D.Naperville, IL 605401437136454
- Scott Berger, M.D.Naperville, IL 605401366483455
- Mark Daniels, M.D.Naperville, IL 605401043215718
- Marc Fallah, MDNaperville, IL 605401750356804
- Sushama Gundlapalli, M.D.Naperville, IL 605401568401529
- Donald Hoscheit, MDNaperville, IL 605401316913809
- Dinesh Jain, M.D.Naperville, IL 605401003857103
Common questions
What is Harold Mozwecz, MD's NPI number?
Harold Mozwecz, MD's National Provider Identifier (NPI) is 1356318349, issued on Mar 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Harold Mozwecz, MD located?
The NPPES record lists a practice address at 100 Spalding Dr, Naperville, IL, 60540. Phone: (630) 717-2600. Providers update this record themselves, so call before visiting.
How can I verify Harold Mozwecz, MD's license?
NPPES lists Illinois license number 036075083, 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 Harold Mozwecz, MD prescribe under Medicare Part D?
In 2024, Harold Mozwecz, MD had 1,143 Medicare Part D claims for 539 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.