Medicare Enrolled
Dr. Mark Harrison, MD
Radiology - Diagnostic · Mcallen, TX
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Harrison from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
Are you Dr. Harrison?
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What this data tells you about Dr. Harrison
Dr. Mark Harrison is a radiology - diagnostic specialist in Mcallen, TX, with 21 years of NPI registration. Based on federal Medicare data, Dr. Harrison performed 7,731 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Harrison received a total of $3,501 from 64 pharmaceutical and/or device companies across 218 payment records. A record can group multiple payments. These transfers are publicly reported through CMS Open Payments. Disclosure alone does not establish their effect on care. A reliable breakdown by payment category is not available in this snapshot. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Harrison is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 21 years of NPI registration
▲ Top 16% volume in TX
$3,501 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗7,731
Medicare services
Top 16% in TX for radiology - diagnostic
Not available
Unique patients (not deduplicated)
$49
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Contrast dye for imaging (iodine-based) A contrast agent containing 300-399 mg/ml of iodine used to enhance imaging studies. It is administered per milliliter to improve the visibility of internal structures. |
5,900 | $0 | $0 |
| CT guidance for radiation therapy This procedure uses computed tomography imaging to guide the precise placement of radiation therapy fields. It ensures accurate positioning for targeted treatment delivery. |
558 | $92 | $477 |
| Intensity-modulated radiation therapy delivery Delivery of radiation therapy using narrow beams that are spatially and temporally modulated to target specific areas. This process is performed per treatment session. |
503 | $270 | $1,399 |
| Continuing radiation therapy consultation per week A weekly consultation to review and manage ongoing radiation therapy treatment. |
144 | $65 | $305 |
| Radiation treatment management, 5 sessions Oversight and management of a radiation therapy course consisting of five treatment sessions. |
141 | $147 | $760 |
| Calculation of radiation therapy dose | 134 | $50 | $261 |
| Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries | 85 | $239 | $1,200 |
| Nuclear medicine scan from skull base to mid-thigh with CT A nuclear medicine imaging study covering the area from the base of the skull to the middle of the thighs, performed alongside a CT scan. |
84 | $1,089 | $5,709 |
| CT scan of chest with and without contrast A computed tomography scan of the chest performed using both intravenous contrast dye and without it to provide detailed images of internal structures. |
33 | $82 | $948 |
| Design and construction of complex radiation treatment device This code covers the design and construction of a complex radiation treatment device. It does not specify the clinical purpose or conditions treated. |
27 | $93 | $500 |
| New patient office visit, complex (60-74 min) | 27 | $154 | $546 |
| CT scan of abdomen and pelvis with contrast A CT scan of the abdomen and pelvis using contrast dye before and after administration to visualize internal structures. |
24 | $161 | $1,445 |
| Complex radiation therapy planning | 17 | $129 | $676 |
| Radiation treatment planning, 1 area This procedure involves gathering the necessary data to design the most effective radiation therapy plan for a single treatment area. |
14 | $204 | $1,077 |
| High precision radiation therapy planning This procedure involves the detailed planning and setup required for delivering high-precision radiation therapy to a target area of the body. |
14 | $1,394 | $7,424 |
| Design and construction of radiation treatment device This code covers the design and construction of a device used for high precision radiation therapy. It does not include the actual administration of radiation treatment. |
14 | $354 | $2,012 |
| CT scan of abdomen and pelvis, without contrast A computed tomography scan that creates detailed images of the abdominal and pelvic organs. The procedure is performed without the use of intravenous contrast dye. |
12 | $67 | $871 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. These counts do not measure clinical quality or years of experience.
Industry Payment Transparency
Open Payments through 2024 ↗$3,501
Total received (2018-2024)
Avg $500/year across 7 years
Top 20% in TX for radiology - diagnostic
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
64
Companies
218
Payment records
Payments are publicly reported; disclosure does not establish legality · Not evidence of wrongdoing · How to interpret →
Payment categories are unavailable while the source breakdown is being rebuilt. Company and year totals do not identify how much belongs to each category.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$588
2023
$548
2022
$539
2021
$813
2020
$477
2019
$356
2018
$179
Payments by company (2024)
Bayer Healthcare Pharmaceuticals Inc.
$134
SOBI, INC
$54
Janssen Biotech, Inc.
$48
Daiichi Sankyo Inc.
$43
TAIHO ONCOLOGY, INC.
$41
Genentech USA, Inc.
$39
Fennec Pharmaceuticals, Inc.
$26
SpringWorks Therapeutics, Inc.
$23
Novartis Pharmaceuticals Corporation
$21
GENZYME CORPORATION
$20
Genmab U.S., Inc.
$19
Merck Sharp & Dohme LLC
$19
E.R. Squibb & Sons, L.L.C.
$18
BeiGene USA, Inc.
$16
Sirtex Medical Inc
$14
GlaxoSmithKline, LLC.
$14
TerSera Therapeutics LLC
$13
Ipsen Biopharmaceuticals, Inc
$13
Regeneron Healthcare Solutions, Inc.
$13
Top 3 companies account for 40.2% of 2024 payments
All-time payments by company (2018-2024) ›
Janssen Biotech, Inc.
$372
E.R. Squibb & Sons, L.L.C.
$191
Amgen Inc.
$177
Bayer Healthcare Pharmaceuticals Inc.
$149
Incyte Corporation
$119
Eisai Inc.
$117
Lilly USA, LLC
$106
GlaxoSmithKline, LLC.
$102
SOBI, INC
$94
Takeda Pharmaceuticals U.S.A., Inc.
$93
Merck Sharp & Dohme LLC
$91
TAIHO ONCOLOGY, INC.
$89
Exelixis Inc.
$89
Sirtex Medical Inc
$88
Taiho Oncology, Inc.
$77
Novartis Pharmaceuticals Corporation
$67
JAZZ PHARMACEUTICALS INC.
$67
Karyopharm Therapeutics Inc.
$62
Celgene Corporation
$59
Daiichi Sankyo Inc.
$58
Boehringer Ingelheim Pharmaceuticals, Inc.
$56
Deciphera Pharmaceuticals Inc.
$56
AVEO Pharmaceuticals, Inc.
$54
TerSera Therapeutics LLC
$50
ABBVIE INC.
$47
Genmab U.S., Inc.
$47
Bayer HealthCare Pharmaceuticals Inc.
$45
Merck Sharp & Dohme Corporation
$44
Seagen Inc.
$44
Dova Pharmaceuticals
$43
AMAG Pharmaceuticals, Inc.
$42
GENZYME CORPORATION
$41
Genentech USA, Inc.
$39
EISAI INC.
$31
EMD Serono, Inc.
$30
MorphoSys, US Inc.
$30
Sobi, Inc
$29
Ipsen Biopharmaceuticals, Inc
$27
Fennec Pharmaceuticals, Inc.
$26
Alexion Pharmaceuticals, Inc.
$26
Janssen Pharmaceuticals, Inc
$26
Jazz Pharmaceuticals Inc.
$24
PFIZER INC.
$23
SpringWorks Therapeutics, Inc.
$23
Acceleron Pharma, Inc.
$22
Myovant Sciences Inc.
$22
Sumitomo Pharma America, Inc.
$21
AstraZeneca Pharmaceuticals LP
$20
Coherus Biosciences Inc.
$19
SERVIER PHARMACEUTICALS LLC
$18
Amneal Pharmaceuticals LLC
$17
Pharming Healthcare, Inc.
$17
Tactile Systems Technology Inc
$17
Array BioPharma Inc.
$16
BeiGene USA, Inc.
$16
Gilead Sciences, Inc.
$16
Pharmacyclics LLC, an AbbVie Company
$15
Helsinn Therapeutics (U.S.), Inc.
$15
Sandoz Inc.
$15
Spectrum Pharmaceuticals Inc.
$15
Regeneron Healthcare Solutions, Inc.
$13
Kyowa Kirin, Inc.
$12
Rigel Pharmaceuticals, Inc.
$12
Pharmacyclics LLC, An AbbVie Company
$12
Top 3 companies account for 21.1% of all-time payments
Associated products mentioned in payments ›
AKYNZEO · ALIMTA · AVASTIN · Abraxane · BLENREP · BRUKINSA · Balversa · Bavencio · Braftovi · CABOMETYX · CYRAMZA · Cabometyx · DALVANCE · DARZALEX · DOPTELET · Doptelet · ENJAYMO · Enhertu · Epkinly · Erleada · FERAHEME · FOTIVDA · Flexitouch Plus · GILOTRIF · ICLUSIG · IMBRUVICA · INJECTAFER · INQOVI · Imbruvica · JAKAFI · JEVTANA · KEYTRUDA · KISQALI · KRAZATI · Kyprolis · LIBTAYO · LONSURF · LUTATHERA · Lenvima · Lonsurf · MONJUVI · NINLARO · Neulasta · Nplate · Nubeqa · OGSIVEO · OJJAARA · OPDIVO · ORGOVYX · Onivyde · PADCEV · POTELIGEO · PROMACTA · Pedmark · Prolia · QINLOCK · ROLVEDON · RUCONEST · Reblozyl · Revlimid · SIR-Spheres Microspheres · SOMATULINE DEPOT · Stivarga · TAGRISSO · TECVAYLI · TUKYSA · Tavalisse · Tecentriq · Tibsovo · Trodelvy · Turalio · Udenyca · Ultomiris · VERZENIO · VOTRIENT · VYXEOS · XARELTO · XPOVIO · XTANDI · Xermelo · ZARXIO · ZEPZELCA · ZYTIGA
Should you be concerned? Industry payments are disclosed through CMS Open Payments. Disclosure alone does not establish their purpose, legality, or effect on care. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Geographic Context
Radiology - diagnostics in nearby ZIP areas
5
County median income
$52,281
Nearest hospital to ZIP centroid (approximate)
RIO GRANDE REGIONAL HOSPITAL
3.7 mi
3.7 mi
Data Sources
| Provider Registry | ✓ NPPES | NPPES snapshot; verify current record |
| Medicare Enrollment | ✓ PECOS | PECOS snapshot |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not included | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Harrison is a mixed practice specialist, with above-average Medicare volume (top 16% in TX), with 21 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Harrison experienced with contrast dye for imaging (iodine-based)?
Based on Medicare claims data, Dr. Harrison performed 5,900 contrast dye for imaging (iodine-based) services. These records cover Medicare fee-for-service activity, including eligible younger beneficiaries; they do not measure total practice volume or clinical quality.
Does Dr. Harrison receive payments from pharmaceutical companies?
Yes. Dr. Harrison received a total of $3,501 from 64 companies across 218 payment records. A record can group multiple payments. These transfers are publicly disclosed through CMS Open Payments. Disclosure alone does not establish their legality or effect on care. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Harrison's costs compare to other radiology - diagnostics in Mcallen?
Dr. Harrison's average Medicare payment per service is $49. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Harrison) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating the presence of registry, enrollment, activity or payment records, not verified experience or clinical quality. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Source publication dates and the snapshots loaded on this site can differ. Rebuilding a page does not refresh its source records. Check the Medicare reporting year and the payment interval shown above; consult the linked official sources for newer releases and current registry details. See our data freshness policy →
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About this page
This page combines public CMS records with calculated summaries and explanatory procedure labels. These transformations are not verbatim federal records. Sources: NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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