NPI age
20 years
Enumerated 2005-07-07
● Active
Type 1 · Individual
Mark L Harrison, MD
Harrison is 1 of 5 radiology providers in McAllen and 1 of 568 in Texas.
Primary specialty
Radiology
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2007-07-08
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 568 active radiology providers in Texas.
NPI age
20 years
↑ 2 yr above median (18 yr)
State licenses
1 state
18% of peers hold multiple states
Subspecialties
0
31% of peers hold subspecialties
NPI lifetime · 2005 → 2026
2005-07Enumerated in NPPES
2005
2026
Where they practice
Practice location
620 S Broadway St
McAllen, TX 785014906
Mailing address
620 S Broadway St
McAllen, TX 785014906
Specialties
-
Radiology PrimaryA radiologist who deals with the therapeutic applications of radiant energy and its modifiers and the study and management of disease, especially malignant tumors.
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (TX) | 96320902 |
Practice context
Part of a multi-provider practice. 2 other active providers share this practice address in NPPES.
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- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
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