Physician Profile
Unclaimed ProfileAbout HARRISON
Based in Mcallen, TX, Mark L Harrison, MD is listed in the NPI registry under radiation oncology. Mark graduated from University of Cincinnati College of Medicine in 1982.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What kind of doctor is Dr. Harrison?
Dr. Harrison is a radiation oncology in Mcallen, TX. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “RADIATION ONCOLOGY”.
NPI registry
What is Dr. Harrison's address?
Dr. Harrison is listed at 620 S BROADWAY ST, Mcallen, TX 78501. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Harrison?
The number on file is (956) 682-9680. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Harrison's NPI number?
Dr. Harrison's National Provider Identifier is 1417954124. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Harrison train?
Dr. Harrison attended University of Cincinnati College of Medicine, graduating in 1982. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Harrison been practising?
Dr. Harrison has 44 years experience. Calculated from a graduation year of 1982, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Harrison perform?
According to Medicare billing data, Dr. Harrison performs imaging including ct guidance for insertion of radiation therapy fields and radiation treatment management, 5 treatment sessions, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Harrison confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Harrison. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (956) 682-9680
- Email not available
Practice Locations
620 S BROADWAY ST
Mcallen, TX 78501
Procedures Most Often Billed to Medicare
7,758 services · 466 patients · 18 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Ct guidance for insertion of radiation therapy fields | Imaging | 77014 |
718 |
| Radiation treatment management, 5 treatment sessions | Imaging | 77427 |
167 |
| Calculation of radiation therapy dose | Imaging | 77300 |
165 |
| Continuing radiation therapy consultation per week | Imaging | 77336 |
164 |
| Nuclear medicine study from skull base to mid-thigh with ct scan | Imaging | 78815 |
59 |
| Design and construction of complex radiation treatment device | Imaging | 77334 |
44 |
| Ct scan of abdomen and pelvis before and after contrast | Imaging | 74178 |
28 |
| Complex radiation therapy planning | Imaging | 77263 |
23 |
| Ct scan of chest before and after contrast | Imaging | 71270 |
20 |
| Design and construction of radiation treatment device for high precision radiation therapy | Imaging | 77338 |
16 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other radiation oncology specialists in Mcallen 3
Same specialty, same city.
Trained at University of Cincinnati College of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 1982 at University of Cincinnati College of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Ct guidance for insertion of radiation therapy fields 8
Providers in TX who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.