Michael William Fremgen
- Medicare services, 2024
- 131
- Medicare patients, 2024
- 110
- Part D claims, 2024
- 83
- Hospital affiliations
- 1
- Industry payments
- $1,866
- Practice address
- 745 Fletcher Dr, Elgin, IL 60123
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Elgin Gastroenterology Endoscopy Center LLC - HOPD
Acute Care Hospital outpatient department · Elgin, Illinois
Find Michael Fremgen's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Michael William Fremgen is a general surgeon in Elgin, Illinois
Michael Fremgen practices at Elgin Gastroenterology Endoscopy Center LLC - HOPD in Elgin, Illinois.
Michael Fremgen's NPI, 1447591540, was assigned on March 14, 2013. Michael Fremgen graduated from Midwestern University, Chicago College of Osteopathic Med in 2013. Michael Fremgen holds Illinois license 036.147286.
- NPI
- 1447591540NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7719272939
- NPI enumeration date
- March 14, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Michael William Fremgen practices at Elgin Gastroenterology Endoscopy Center LLC - HOPD in Elgin, Illinois
Michael Fremgen's primary practice is Elgin Gastroenterology Endoscopy Center LLC - HOPD, at 745 Fletcher Dr, Elgin, IL 60123.
- Elgin Gastroenterology Endoscopy Center LLC - HOPD745 Fletcher Dr, Elgin, IL 60123
Source: Dmand AI Affiliation Data
Michael William Fremgen is affiliated with 5 sites of care and 3 medical groups
Michael Fremgen's primary practice is Elgin Gastroenterology Endoscopy Center LLC - HOPD in Elgin, Illinois. Michael Fremgen is also affiliated with Advocate Sherman Hospital. The medical group on file is Dreyer Medical Clinic (Advocate Medical Group). Dmand AI also links Michael Fremgen to 2 more group practices and clinics, 2 medical groups and 1 ambulatory surgery center, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Michael William Fremgen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Michael Fremgen practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Elgin Gastroenterology Endoscopy Center LLC - HOPD | Available with a free account |
| +4 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Michael William Fremgen is one of 1,217 general surgeons in Illinois
Surgery is Michael Fremgen's primary specialty in the NPI Registry, under taxonomy code 208600000X. Michael Fremgen is licensed in Illinois.
Specialties and state licenses
- Surgery, IllinoisPrimary
General surgeons near Michael Fremgen
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Michael William Fremgen billed Medicare for 131 services in 2024
CMS data shows 131 Medicare services from Michael Fremgen across 4 procedure codes in 2024, for 110 Medicare patients. Medicare paid $12,782 for them.
Michael Fremgen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1192024: 13110%
Where Michael Fremgen's Medicare services took place, 2024
- In an office2217%
- In a facility10983%
Michael Fremgen compared with the Illinois median for general surgeons, 2024
- Michael Fremgen
- Illinois median
- Medicare services
- 131vs 19432% below
- Medicare patients
- 110vs 14424% below
- Part D claims
- 37vs 2832% above
Medians across 1,031 general surgeons in Illinois with Dmand AI profiles that report each measure.
Michael Fremgen's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Michael Fremgen and other general surgeons in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Michael William Fremgen treated 110 Medicare patients in 2024, average age 73
CMS counts 110 Medicare patients who saw Michael Fremgen in 2024. The largest group is 65 to 74, with 43 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 19% are also on Medicaid. Their average risk score is 2.18, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Michael Fremgen's median patient age at 69, with 43% women.
Michael Fremgen's Medicare patients by age, 2024
Michael Fremgen's Medicare patients by sex, 2024
- Women5045%
- Men6055%
Chronic conditions among Michael Fremgen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis63%
- Chronic kidney disease42%
- Ischemic heart disease40%
- Diabetes37%
- Heart failure36%
- Mood disorders32%
Share of Medicare patients with each condition. A patient can have several.
Michael Fremgen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women43%
- Men57%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Michael William Fremgen wrote 83 Medicare Part D claims in 2024
In 2024, Michael Fremgen wrote 83 Medicare Part D claims for 40 patients. 99% of them were for generic drugs. CMS names the drug for 37 of them, across 2 drugs with 11 or more claims each, at $145 in total drug cost. In 2023, CMS named 33 claims across 2 drugs.
Michael Fremgen's Part D claims by kind of drug, 2024
- Generic82 claims99%
- Brand-name and other1 claims1%
Michael Fremgen's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Michael Fremgen's Part D claims, 2024
- Opioids31%26 of 83 claims
- Antibiotics18%15 of 83 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 332024: 3712%
Drugs named by CMS: 2 in 2024, 2 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Michael William Fremgen takes part in Medicare
Michael Fremgen accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Michael William Fremgen received $1,866 in industry payments from 2018 to 2025
CMS Open Payments shows 19 general payments to Michael Fremgen from 12 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 52% of the total. Davol Inc. paid the most, $1,442.
General payments to Michael Fremgen by program year, 2018 to 2025
General payments to Michael Fremgen by kind, 2018 to 2025
- Food and beverage$96752%
- Travel and lodging$89848%
Companies that paid Michael Fremgen the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Michael William Fremgen graduated from Midwestern University, Chicago College of Osteopathic Med
Michael Fremgen graduated from Midwestern University, Chicago College of Osteopathic Med in 2013.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Michael William Fremgen's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Michael William Fremgen
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Michael William Fremgen's NPI number?
Michael William Fremgen's NPI number is 1447591540. It was assigned on March 14, 2013, and it is active in the NPI Registry.
What does Michael William Fremgen specialize in?
Michael William Fremgen is a general surgeon in Elgin, Illinois. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Michael William Fremgen practice?
Michael Fremgen practices at 745 Fletcher Dr, Elgin, IL 60123. Michael Fremgen's primary practice is Elgin Gastroenterology Endoscopy Center LLC - HOPD in Elgin, Illinois. Dmand AI also links Michael Fremgen to 2 group practices and clinics, 2 medical groups and 1 ambulatory surgery center.
What is Michael William Fremgen's medical license number?
Michael Fremgen holds Illinois license 036.147286.
Which hospitals is Michael William Fremgen affiliated with?
Michael Fremgen is affiliated with Advocate Sherman Hospital.
What medical group is Michael William Fremgen part of?
Michael Fremgen is linked to Dreyer Medical Clinic (Advocate Medical Group). Dmand AI links Michael Fremgen to 2 more medical groups.
Does Michael William Fremgen accept Medicare?
Yes. CMS data shows Michael Fremgen billed Medicare for 131 services in 2024, and Michael Fremgen accepts Medicare assignment.
How many Medicare patients does Michael William Fremgen see?
CMS counts 110 Medicare patients who saw Michael Fremgen in 2024, with an average age of 73.
What services does Michael William Fremgen bill to Medicare?
In 2024, Michael Fremgen's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99222) and office visit, new patient (99204).
Where did Michael William Fremgen go to medical school?
Michael Fremgen graduated from Midwestern University, Chicago College of Osteopathic Med in 2013.
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What drugs does Michael William Fremgen prescribe most?
In 2024 Medicare Part D data, Michael Fremgen's most prescribed drugs by claims were Hydrocodone-Acetaminophen and Ibuprofen.
Has Michael William Fremgen received payments from drug or device companies?
CMS Open Payments shows $1,866 in general payments to Michael Fremgen from 12 companies from 2018 to 2025. The largest total came from Davol Inc.
How long has Michael William Fremgen been practicing?
Michael Fremgen graduated from medical school in 2013, 13 years ago.
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