Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. John Allen Key, DO

Individual provider Cardiovascular Disease Physician · NPI 1134103732

Dr. John Allen Key, DO is registered under Cardiovascular Disease (Cardiology) in Wyoming, Michigan. Graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville in 1989, 37 years ago. Practices with Spectrum Health Primary Care Partners, a 2,303-clinician group and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
37
Trained at
At Still University of Health Sciences, College of Osteo Med, Kirksville
Licensed in
MI
In the registry since
2005
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

5900 Byron Center Ave SW
Wyoming, MI 49519-9606
Phone: (616) 241-2333
Fax: (616) 452-6767
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 5101010722 (MI)

Record details

NPI number1134103732
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedDecember 6, 2005
Last updated in NPPESFebruary 25, 2021
Certification dateFebruary 25, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Also practisesINTERNAL MEDICINE
Medical schoolAT STILL UNIVERSITY OF HEALTH SCIENCES, COLLEGE OF OSTEO MED, KIRKSVILLE
Graduated 1989 (37 years in practice)
Group practice Spectrum Health Primary Care Partners — 2303 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations23 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients983
Services billed 1,680 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $28 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Corewell Health Pennock Hospital Hospital · Hastings, MI · listed as Pennock Hospital
  • Spectrum Health Hospital · Grand Rapids, MI · listed as Spectrum Health Hospital
  • Spectrum Health United Hospital Hospital · Greenville, MI · listed as Spectrum Health Hospital
  • Corewell Health Big Rapids Hospital Hospital · Big Rapids, MI
  • Corewell Health Reed City Hospital Hospital · Reed City, MI

Colleagues at Spectrum Health Primary Care Partners

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2303 clinicians in the practice; 12 are shown here.

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