Michael C. Willoughby, D.O.
Cardiovascular Disease Physician · Mount Clemens, MI
Michael C. Willoughby, D.O. is a cardiovascular disease physician with a practice address in Mount Clemens, Michigan, and NPI 1457589582, issued on Jun 27, 2009. Check the license (Michigan 5101018254, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Michael C. Willoughby
- Credential
- D.O.
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License numbers
- 5101018254 MI
036137782 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1000 Harrington St, Mount Clemens, MI 48043
- Phone
- (586) 493-8000
- Enumerated
- Jun 27, 2009
- Record last updated
- Aug 22, 2025
- Medicare enrollment
- Enrolled (PECOS I20131021001859); accepts Medicare assignment
- Medical or professional school
- Michigan State University College Of Osteopathic Medicine, 2009
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 860 in Michigan → Look up another NPI →
Also registered at 1000 Harrington St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Youssef Abbiss, D.O.Internal Medicine Physician1982991881
- Nicholas Abdelnour, DPMStudent in an Organized Health Care Education/Training Program1902648603
- Gabriella Abraham, DOStudent in an Organized Health Care Education/Training Program1568219889
- Aditya AcharyaStudent in an Organized Health Care Education/Training Program1164368783
- John Adamczak, CRNACertified Registered Nurse Anesthetist1316190242
- Lisa AdamczykPhysical Therapist1861983991
Verify Michael C. Willoughby in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 5101018254Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
738 Medicare Part D claims for 207 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Eliquis84 claims
- Sotalol71 claims
- Metoprolol Succinate59 claims
- Amiodarone Hcl52 claims
- Flecainide Acetate42 claims
- Metoprolol Tartrate39 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: $264.28
5 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 16,686 providers of this specialty with any payment received $3,819.56 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.
3 hospitals and group practices
- Mclaren MacombMount Clemens, MI · Acute Care Hospitals1 of 5 stars
- Mclaren Medical GroupWaterford, MI
- Northwestern Medical Faculty FoundationPalos Heights, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Michael C. Willoughby among 860 cardiovascular disease physician records in Michigan
Michael C. Willoughby, D.O. is one of 860 cardiovascular disease physician records with a practice address in Michigan. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 68% of them.
- NPI issued2009 · 68% of these records are older, 28% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2009 · median 1999 among the 606 with a school on file
- Record last updated2025 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
19 cardiovascular disease physician records list a practice address in Mount Clemens
They are 19 of the 858 NPPES records with a practice address in Mount Clemens, and 860 cardiovascular disease physician records in Michigan.
All 860 in Michigan → Every provider in Mount Clemens → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Nikhil Ambulgekar, M.D.Mount Clemens, MI 480431497074264
- Beth Bowling, MDMount Clemens, MI 480431487636635
- Michael Deyoung, D.O.Mount Clemens, MI 480431487861043
- Melissa Ianitelli, D.O.Mount Clemens, MI 480431497066963
- John Kazmierski, DOMount Clemens, MI 480431164403481
- Natesh Lingam, MDMount Clemens, MI 480431801005145
- Brian Litch, DOMount Clemens, MI 480431538141262
- Timothy Logan, D.O.Mount Clemens, MI 480431477763779
Common questions
What is Michael C. Willoughby, D.O.'s NPI number?
Michael C. Willoughby, D.O.'s National Provider Identifier (NPI) is 1457589582, issued on Jun 27, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Michael C. Willoughby, D.O. located?
The NPPES record lists a practice address at 1000 Harrington St, Mount Clemens, MI, 48043. Phone: (586) 493-8000. Providers update this record themselves, so call before visiting.
How can I verify Michael C. Willoughby, D.O.'s license?
NPPES lists Michigan license number 5101018254, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Michael C. Willoughby, D.O. prescribe under Medicare Part D?
In 2024, Michael C. Willoughby, D.O. had 738 Medicare Part D claims for 207 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. 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.