Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. William Mark McCollough, MD

Individual provider Radiation Oncology Physician · NPI 1881674992

Dr. William Mark McCollough, MD practises Radiation Oncology in Asheville, North Carolina. Graduated from University of Florida College of Medicine in 1985, 41 years ago. Practices with Mission Health Community Multispecialty Providers LLC, a 598-clinician group and accepts Medicare assignment. Licensed in North Carolina.

Years since qualifying
41
Trained at
University of Florida College of Medicine
Licensed in
NC
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

21 Hospital Dr Lowr Level
Asheville, NC 28801-4550 Not confirmed with CMS for 10 years — call before visiting
Phone: (828) 213-0100
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence 200300500 (NC)

Record details

NPI number1881674992
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 17, 2006
Last updated in NPPESJuly 18, 2016

Medicare enrollment

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

Medicare specialtyRADIATION ONCOLOGY
Medical schoolUNIVERSITY OF FLORIDA COLLEGE OF MEDICINE
Graduated 1985 (41 years in practice)
Group practice Mission Health Community Multispecialty Providers Llc — 598 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients196
Services billed 1,373 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 $33 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.

  • Haywood Regional Medical Center Hospital · Clyde, NC
  • Adventhealth Hendersonville Hospital · Hendersonville, NC
  • Memorial Mission Hospital And Asheville Surgery Ce Hospital · Asheville, NC

Also affiliated with 1 inpatient rehabilitation facility, which CMS identifies by certification number only.

Colleagues at Mission Health Community Multispecialty Providers LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 598 clinicians in the practice; 12 are shown here.

Other providers in Asheville