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

Christopher Allen Willner II, DO

Individual provider Internal Medicine Physician · NPI 1881043594

Christopher Allen Willner II, DO practises Internal Medicine in Ann Arbor, Michigan. Graduated from Michigan State University College of Osteopathic Medicine in 2016, 10 years ago. Practices with Henry Ford Health System, a 2,540-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Michigan.

Years since qualifying
10
Trained at
Michigan State University College of Osteopathic Medicine
Licensed in
MI
In the registry since
2016
Specialties on file
3
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

1500 E Medical Center Dr
Ann Arbor, MI 48109-5000
Phone: (734) 936-4000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2799 W Grand Blvd, Detroit, MI 48202-2608 — (313) 916-2600

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 5101022295 (MI)
Internal Medicine Physician Taxonomy 207R00000X · Licence 5101022295 (MI)
Medical Oncology Physician Taxonomy 207RX0202X · Licence 5101022295 (MI)

Record details

NPI number1881043594
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJune 3, 2016
Last updated in NPPESOctober 6, 2026
Certification dateOctober 6, 2026

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesHEMATOLOGY/ONCOLOGY
Medical schoolMICHIGAN STATE UNIVERSITY COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 2016 (10 years in practice)
Group practice Henry Ford Health System — 2540 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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 patients175
Services billed 1,423 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

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 $57 2 payments · a meal or drink at a meeting or visit, not a fee
Education $23 1 payment · educational material or training, 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.

Colleagues at Henry Ford Health System

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2540 clinicians in the practice; 12 are shown here.

Other providers in Ann Arbor