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

Mark Harrison MD PLLC

Organization Radiation Oncology Physician · NPI 1104234640

Mark Harrison MD PLLC is a Radiation Oncology Physician in Harlingen, Texas. Licensed in Texas. Registered with an NPI since 2014.

Licensed in
TX
In the registry since
2014
What do these letters mean?
PLLC — Professional limited liability company
A form of business registration, not a clinical qualification.

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Practice location Address checks out

1719 Treasure Hills Blvd
Harlingen, TX 78550-8912
Phone: (956) 430-9400
Fax: (956) 440-1189
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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 (TX)

Record details

NPI number1104234640
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Mark Harrison — President · (956) 430-6400
NPI enumeratedJuly 29, 2014
Last updated in NPPESJuly 29, 2014
Mailing address1719 Treasure Hills Blvd, Harlingen, TX 78550-8912

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