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

Michael A Henderson, MD

Individual provider Internal Medicine Physician · NPI 1639125495

Michael A Henderson, MD practises Internal Medicine in Oak Ridge, Tennessee. Graduated from Brody School of Medicine at East Carolina University in 2003, 23 years ago. Practices with Summit Medical Group, PLLC, a 636-clinician group and accepts Medicare assignment. Licensed in Tennessee.

Years since qualifying
23
Trained at
Brody School of Medicine at East Carolina University
Licensed in
TN
In the registry since
2006
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

801 Oak Ridge Tpke
Oak Ridge, TN 37830-6916 Not confirmed with CMS for 18 years — call before visiting
Phone: (865) 483-3172
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 39895 (TN)

Record details

NPI number1639125495
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 25, 2006
Last updated in NPPESMay 7, 2008

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolBRODY SCHOOL OF MEDICINE AT EAST CAROLINA UNIVERSITY
Graduated 2003 (23 years in practice)
Group practice Summit Medical Group, Pllc — 636 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations7 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.

Removal of skin lesions 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.

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 patients473
Services billed 8,677 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 $789 55 payments · a meal or drink at a meeting or visit, not a fee
Education $19 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.

  • Lafollette Medical Center Hospital · La Follette, TN · listed as Campbell County Hma, LLC
  • Parkwest Medical Center Hospital · Knoxville, TN
  • Physicians Regional Medical Center Hospital · Powell, TN · listed as Metro Knoxville Hma LLC
  • Methodist Medical Center Of Oak Ridge Hospital · Oak Ridge, TN
  • Amedisys Home Health Care Home health agency · Knoxville, TN
  • Nhc Homecare Knoxville Home health agency · Knoxville, TN

Colleagues at Summit Medical Group, PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 636 clinicians in the practice; 12 are shown here.

Other providers in Oak Ridge