MARK L HARRISON (MD) – Radiation Oncology Physician, NPI 1417954124
Radiation Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
450 RADIATION ONCOLOGY in TX
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Provider Addresses for MARK L HARRISON (MD)
620, South Broadway Street, McAllen, Hidalgo County, Texas, 78501, United States
MCALLEN, TX 785014906
Phone: (956) 682-9680
Fax: (956) 682-9915
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 64 Open Payments records for all available years, with a total value of $1,137.
Total Amount is formed as General ($1,137) + Research ($0) + Ownership ($0) = $1,137.
Last reported payment date: 2024-12-16 • Largest payer in this snapshot: Bayer Healthcare Pharmaceuticals Inc. ($134).
Total Amount
$1,137
General + Research + Ownership
Payments
64
Total payment records
General Amount
$1,137
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-16
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Bayer Healthcare Pharmaceuticals Inc. | $134 |
| Janssen Biotech, Inc. | $95 |
| Sirtex Medical Inc | $56 |
| SOBI, INC | $55 |
| Eisai Inc. | $49 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2004-01-30
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20040130000394 | I | Radiation Oncology | TX | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| Q9967 | Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml | 5,900 | 51 | $0 |
| 77014 | Ct guidance for insertion of radiation therapy fields | 558 | 21 | $0 |
| G6015 | Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session | 503 | 18 | $0 |
| 77336 | Continuing radiation therapy consultation per week | 144 | 28 | $0 |
| 77427 | Radiation treatment management, 5 treatment sessions | 141 | 27 | $0 |
Insurance plans in this area (ZIP 78501)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| RADIATION ONCOLOGY | TX | 77263 | Management of radiation therapy, complex | 65 | 60 |
| RADIATION ONCOLOGY | TX | 77300 | Calculation of radiation therapy dose | 401 | 50 |
| RADIATION ONCOLOGY | TX | 77427 | Radiation treatment management, 5 treatments | 399 | 73 |
| RADIATION ONCOLOGY | TX | 78815 | Nuclear medicine study with CT imaging skull base to mid-thigh | 145 | 115 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| U R O L O G Y | TX | |
| Medical Oncology, Hematology/Oncology, Internal Medicine | TX |
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