Dr. Michael C. Willoughby, DO
- Medicare services, 2024
- 987
- Medicare patients, 2024
- 286
- Part D claims, 2024
- 738
- Hospital affiliations
- 2
- Industry payments
- $27,740
- Practice address
- 12251 South 80th Avenue, Palos Heights, IL 60463
- Practice phone
- Call (708) 923-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Willoughby's professional email, personal email and mobile number
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Dr. Michael C. Willoughby is a cardiac electrophysiologist in Palos Heights, Illinois
Dr. Willoughby practices at Northwestern Medicine Palos Hospital in Palos Heights, Illinois, part of Northwestern Memorial HealthCare.
Dr. Willoughby's NPI, 1457589582, was assigned on June 27, 2009. Dr. Willoughby graduated from Michigan State University College of Osteopathic Medicine in 2009. Dr. Willoughby holds Michigan license 5101018254.
- NPI
- 1457589582NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8123253598
- NPI enumeration date
- June 27, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (708) 923-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael C. Willoughby practices at Northwestern Medicine Palos Hospital in Palos Heights, Illinois
Dr. Willoughby's primary practice is Northwestern Medicine Palos Hospital, at 12251 South 80th Avenue, Palos Heights, IL 60463 in Cook County. The practice phone is (708) 923-4000.
- Northwestern Medicine Palos Hospital12251 South 80th Avenue, Palos Heights, IL 60463 · Cook CountyPhone(708) 923-4000
Source: Dmand AI Affiliation Data
Dr. Michael C. Willoughby is affiliated with 2 sites of care and 4 medical groups
Dr. Willoughby's primary practice is Northwestern Medicine Palos Hospital in Palos Heights, Illinois, part of Northwestern Memorial HealthCare. Dr. Willoughby is also affiliated with Northwestern Medicine Central DuPage Hospital. The medical group on file is Northwestern Medical Faculty Foundation. Dmand AI also links Dr. Willoughby to 3 more medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael C. Willoughby's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Willoughby practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwestern Medicine Palos Hospital | Available with a free account |
| +1 more site and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across Northwestern Memorial HealthCare and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Michael C. Willoughby is one of 153 cardiac electrophysiologists in Illinois
Clinical cardiac electrophysiology is Dr. Willoughby's primary specialty in the NPI Registry, under taxonomy code 207RC0001X. Dr. Willoughby is licensed in Michigan.
Specialties and state licenses
- Clinical cardiac electrophysiology, MichiganPrimary
Cardiac electrophysiologists near Dr. Willoughby
Counts of cardiac electrophysiologists 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
Dr. Michael C. Willoughby billed Medicare for 987 services in 2024
CMS data shows 987 Medicare services from Dr. Willoughby across 16 procedure codes in 2024, for 286 Medicare patients. Medicare paid $73,939 for them.
Dr. Willoughby's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 5982024: 51813%
- Office and hospital visits
- 2023: 4112024: 45811%
- Surgery
- 2023: 172024: 1135%
Where Dr. Willoughby's Medicare services took place, 2024
- In an office657%
- In a facility92293%
Dr. Willoughby compared with the Illinois median for cardiac electrophysiologists, 2024
- Dr. Willoughby
- Illinois median
- Medicare services
- 987vs 3,76174% below
- Medicare patients
- 286vs 1,29078% below
- Part D claims
- 585vs 1,27754% below
Medians across 152 cardiac electrophysiologists in Illinois with Dmand AI profiles that report each measure.
Dr. Willoughby'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.
Need commercial claims for Dr. Willoughby?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Willoughby and other cardiac electrophysiologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael C. Willoughby treated 286 Medicare patients in 2024, average age 75
CMS counts 286 Medicare patients who saw Dr. Willoughby in 2024. The largest group is 65 to 74, with 122 patients. 75% of them have atrial fibrillation, and 75% have high blood pressure. 13% are also on Medicaid. Their average risk score is 2.06, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Willoughby's median patient age at 72, with 38% women.
Dr. Willoughby's Medicare patients by age, 2024
Dr. Willoughby's Medicare patients by sex, 2024
- Women12544%
- Men16156%
Chronic conditions among Dr. Willoughby's Medicare patients, 2024
- Atrial fibrillation75%
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease57%
- Heart failure55%
- Arthritis45%
- Diabetes39%
- Chronic kidney disease37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Willoughby's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women38%
- Men61%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael C. Willoughby wrote 738 Medicare Part D claims in 2024
In 2024, Dr. Willoughby wrote 738 Medicare Part D claims for 207 patients. 83% of them were for generic drugs. CMS names the drug for 585 of them, across 18 drugs with 11 or more claims each, at $154,470 in total drug cost. In 2023, CMS named 568 claims across 18 drugs.
Dr. Willoughby's Part D claims by kind of drug, 2024
- Generic615 claims83%
- Brand-name123 claims17%
Dr. Willoughby'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 5682024: 5853%
Drugs named by CMS: 18 in 2024, 18 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
Dr. Michael C. Willoughby ranks in the 65th percentile for pacemaker insertion or repair in Medicare
Dr. Willoughby accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 13 procedures of pacemaker insertion or repair by Dr. Willoughby, more than 65% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Willoughby ranks in Medicare procedure volume
- Pacemaker insertion or repair
- 65th percentile13 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Michael C. Willoughby received $27,740 in industry payments from 2016 to 2025
CMS Open Payments shows 251 general payments to Dr. Willoughby from 21 drug and device companies from 2016 to 2025. Travel and lodging make up the largest share, 43% of the total. Abbott Laboratories paid the most, $12,431.
General payments to Dr. Willoughby by program year, 2016 to 2025
General payments to Dr. Willoughby by kind, 2016 to 2025
- Travel and lodging$11,88843%
- Food and beverage$9,23033%
- Consulting fees$2,3929%
- Grants$2,2068%
- Other$2,0247%
Companies that paid Dr. Willoughby the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael C. Willoughby graduated from Michigan State University College of Osteopathic Medicine
Dr. Willoughby graduated from Michigan State University College of Osteopathic Medicine in 2009.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Michael C. Willoughby'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 DataDmand AI Org Hierarchy 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 Dr. Michael C. Willoughby
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Michael C. Willoughby's NPI number?
Dr. Michael C. Willoughby's NPI number is 1457589582. It was assigned on June 27, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael C. Willoughby?
Dr. Michael C. Willoughby is a cardiac electrophysiologist in Palos Heights, Illinois. The primary specialty in the NPI Registry is Clinical Cardiac Electrophysiology Physician (taxonomy code 207RC0001X).
Where does Dr. Michael C. Willoughby practice?
Dr. Willoughby practices at 12251 South 80th Avenue, Palos Heights, IL 60463. Dr. Willoughby's primary practice is Northwestern Medicine Palos Hospital in Palos Heights, Illinois, part of Northwestern Memorial HealthCare. Dmand AI also links Dr. Willoughby to 3 medical groups.
What is Dr. Michael C. Willoughby's office phone number?
The practice phone on file for Dr. Willoughby is (708) 923-4000.
What is Dr. Michael C. Willoughby's medical license number?
Dr. Willoughby holds Michigan license 5101018254.
Which hospitals is Dr. Michael C. Willoughby affiliated with?
Dr. Willoughby practices at Northwestern Medicine Palos Hospital in Palos Heights, Illinois. Dr. Willoughby is also affiliated with Northwestern Medicine Central DuPage Hospital.
What medical group is Dr. Michael C. Willoughby part of?
Dr. Willoughby is linked to Northwestern Medical Faculty Foundation. Dmand AI links Dr. Willoughby to 3 more medical groups.
Does Dr. Michael C. Willoughby accept Medicare?
Yes. CMS data shows Dr. Willoughby billed Medicare for 987 services in 2024, and Dr. Willoughby accepts Medicare assignment.
How many Medicare patients does Dr. Michael C. Willoughby see?
CMS counts 286 Medicare patients who saw Dr. Willoughby in 2024, with an average age of 75.
What services does Dr. Michael C. Willoughby bill to Medicare?
In 2024, Dr. Willoughby's most billed Medicare services were heart test or procedure (93010), office visit, established patient (99214) and heart test or procedure (93294).
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Where did Dr. Michael C. Willoughby go to medical school?
Dr. Willoughby graduated from Michigan State University College of Osteopathic Medicine in 2009.
What drugs does Dr. Michael C. Willoughby prescribe most?
In 2024 Medicare Part D data, Dr. Willoughby's most prescribed drugs by claims were Eliquis, Sotalol and Metoprolol Succinate.
Has Dr. Michael C. Willoughby received payments from drug or device companies?
CMS Open Payments shows $27,740 in general payments to Dr. Willoughby from 21 companies from 2016 to 2025. The largest total came from Abbott Laboratories.
How long has Dr. Michael C. Willoughby been practicing?
Dr. Willoughby graduated from medical school in 2009, 17 years ago.
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