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

Dr. Michael K Duffy, MD

Individual provider Family Medicine Physician · NPI 1790742898

Dr. Michael K Duffy, MD is registered under Family Practice in Twin Falls, Idaho. Qualified in 2000, 26 years ago. Practices with The Aroostook Medical Center, a 116-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Idaho, Massachusetts and Maine.

Years since qualifying
26
Licensed in
ID, MA, ME
In the registry since
2006
Specialties on file
3
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

388 Martin St
Twin Falls, ID 83301-4544
Phone: (208) 734-0451
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 794 Eastland Dr, Twin Falls, ID 83301-6856 — (208) 737-6718
  • 19 South Gorham Crossing, Gorham, ME 04038-1912 — (207) 839-9101

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence M-8822 (ID)
Family Medicine Physician Taxonomy 207Q00000X · Licence 291582 (MA)
Family Medicine Physician Taxonomy 207Q00000X · Licence MD18385 (ME)

Record details

NPI number1790742898
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 1, 2006
Last updated in NPPESMay 17, 2022
Certification dateMay 17, 2022

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolOTHER
Graduated 2000 (26 years in practice)
Group practice The Aroostook Medical Center — 116 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Skin biopsy 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 $21 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.

  • Cary Medical Center Hospital · Caribou, ME · listed as City of Caribou
  • Northern Light A R Gould Hospital Hospital · Presque Isle, ME
  • Northern Light Home Care & Hospice Home health agency · So Portland, ME

Colleagues at The Aroostook Medical Center

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 116 clinicians in the practice; 12 are shown here.

Other providers in Twin Falls