Registry data as of Aug 27, 2026

Michael Fassl, MD

Student in an Organized Health Care Education/Training Program · Merrionette Park, IL

Michael Fassl, MD is a student in an organized health care education/training program with a practice address in Merrionette Park, Illinois, and NPI 1477173664, issued on Apr 17, 2020. Check the license (Illinois 036-165936, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, loaded Aug 27, 2026 · Medicare files 2023 and 2024 · method · Verify with CMS →

NPPES recordas of Aug 27, 2026
1477173664
Name
Michael Fassl
Credential
MD
Primary taxonomy
Student in an Organized Health Care Education/Training Program 390200000X
License number
036-165936 IL
Self-reported in NPPES; status is on the state search
Practice location
11600 S Kedzie Ave, Merrionette Park, IL 60803
Phone
(708) 272-4150
Enumerated
Apr 17, 2020
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 11600 S Kedzie Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Chris Albanis, MDOphthalmology Physician1720040017
  2. Robert Bonk, D.O.Family Medicine Physician1609894690
  3. Michael Debre, MDInternal Medicine Physician1215044508
  4. Brianna Denton, RD, LDNRegistered Dietitian1639892144
  5. Erin Drever, MDEndocrinology, Diabetes & Metabolism Physician1750631727
  6. Lauren Ellis, FNPFamily Nurse Practitioner1558996090

Verify Michael Fassl in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Illinois board licenses this profession
    Search for license 036-165936
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Find the Illinois license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

6.4 times the Medicare Part D claims of the average student in an organized health care education/training program in 2024

3,144 Medicare Part D claims for 474 beneficiaries, against an average of 488 among the 106,422 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 91 claims were for opioids.

  1. Michael Fassl3,144
  2. Specialty average488

Most prescribed

  1. Atorvastatin Calcium210 claims
  2. Amlodipine Besylate150 claims
  3. Lisinopril103 claims
  4. Metformin Hcl98 claims
  5. Furosemide91 claims
  6. Albuterol Sulfate Hfa78 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: $21.06

1 payment, mostly food and beverage; the largest payer was Novo Nordisk Inc. The 42,769 providers of this specialty with any payment received $1,210.19 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Michael Fassl$21.06
  2. Specialty average$1,210.19

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

One hospital or facility affiliation

  1. Advocate Health And Hospitals CorporationMerrionette Park, IL

Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

3 student in an organized health care education/training program records list a Merrionette Park practice address

They are 3 of the 106 NPPES records with a Merrionette Park practice address, and 10,003 student in an organized health care education/training program records in Illinois.

Other student in an organized health care education/training program records in Illinois

  1. Hala Abbas, MDChicago, IL1164306254
  2. Leena Abbas, MDChicago, IL1679376594
  3. Shuja Abbas, DPMChicago, IL1891375598
  4. Fatima Abbasi, M.DPeoria, IL1821846981
  5. Salman Abbasifard, MDChicago, IL1891409652
  6. Samantha Abbott, RNEdwardsville, IL1962250084
  7. Brandon AbbsElgin, IL1205408200
  8. Amira Abdalla, MDChicago, IL1538861612
  9. Diane Abdel-Barry, M.D.Chicago, IL1508205808
  10. Hania AbdelhafezChicago, IL1790618684

Common questions

What is Michael Fassl, MD's NPI number?

Michael Fassl, MD's National Provider Identifier (NPI) is 1477173664, issued on Apr 17, 2020. An NPI identifies a provider in billing; it is not a license.

Where is Michael Fassl, MD located?

The NPPES record lists a practice address at 11600 S Kedzie Ave, Merrionette Park, IL, 60803. Phone: (708) 272-4150. Providers update this record themselves, so call before visiting.

How can I verify Michael Fassl, MD's license?

NPPES lists Illinois license number 036-165936, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.

How much does Michael Fassl, MD prescribe under Medicare Part D?

In 2024, Michael Fassl, MD had 3,144 Medicare Part D claims for 474 beneficiaries; the average among student in an organized health care education/training program prescribers was 488. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.