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

Individual provider Family Medicine Physician · NPI 1225125222

John William Duff, MD practises Emergency Medicine in Midland, Michigan. Qualified in 2006, 20 years ago. Practices with Mymichigan Medical Center Midland, a 509-clinician group and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
20
Licensed in
MI
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2213 Dilloway Dr
Midland, MI 48640-6767 Not confirmed with CMS for 15 years — call before visiting
Phone: (989) 493-3882
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence JD088515 (MI)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 4301088515 (MI)

Record details

NPI number1225125222
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 10, 2006
Last updated in NPPESApril 18, 2011

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Also practisesFAMILY PRACTICE
Medical schoolOTHER
Graduated 2006 (20 years in practice)
Group practice Mymichigan Medical Center Midland — 509 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 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 patients136
Services billed 147 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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Mymichigan Medical Center Midland

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 509 clinicians in the practice; 12 are shown here.

Other providers in Midland