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

Mark L Harrison, MD

Individual provider Radiation Oncology Physician · NPI 1417954124

Mark L Harrison, MD is a Radiation Oncology in McAllen, Texas. Graduated from University of Cincinnati College of Medicine in 1982, 44 years ago. Practices with Valley Cancer Associates PA, a 3-clinician group and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
44
Trained at
University of Cincinnati College of Medicine
Licensed in
TX
In the registry since
2005
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

620 S Broadway St
McAllen, TX 78501-4906
Phone: (956) 682-9680
Fax: (956) 682-9915
Show map & directions

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

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence G4598 (TX)

Record details

NPI number1417954124
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 7, 2005
Last updated in NPPESJuly 8, 2007
Mailing address620 S Broadway St, McAllen, TX 78501-4906

Medicare enrollment

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

Medicare specialtyRADIATION ONCOLOGY
Medical schoolUNIVERSITY OF CINCINNATI COLLEGE OF MEDICINE
Graduated 1982 (44 years in practice)
Group practice Valley Cancer Associates Pa — 3 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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