Medicare Enrolled

Dr. Mark Girguis, MD

Radiation Oncology · Tarpon Springs, FL
Practice pattern: Mixed Practice — Diverse clinical practice across multiple procedure types
40946 US HIGHWAY 19 N # 101, Tarpon Springs, FL 34689
8137207237
In practice since 2006 (19 years)
NPI: 1477591154 verify on NPPES ↗
High
DATA COVERAGE
Data in 3 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. Girguis 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 →
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What this data tells you about Dr. Girguis

Dr. Mark Girguis is a radiation oncology specialist in Tarpon Springs, FL, with 19 years of NPI registration. Based on federal Medicare data, Dr. Girguis performed 12,113 Medicare services across 748 unique beneficiaries.

The Data Coverage level for Dr. Girguis is High — reflecting how much public federal data is available about this provider. This is not a quality rating. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.

✓ 19 years in practice ▲ Top 17% volume in FL

Medicare Practice Summary

Medicare Utilization ↗
12,113
Medicare services
Top 17% in FL for radiation oncology
748
Unique beneficiaries
$4
Avg. Medicare payment
Medicare patients only (65+ / disabled) · Not a quality rating · How to read this →
~638 Medicare services per year of practice

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.
 11,466 $0 $2
Chest X-ray, 1 view
An X-ray image of the chest taken from a single angle. This imaging test is used to visualize the structures within the chest cavity.
 114 $7 $25
CT scan of abdomen and pelvis with contrast
A CT scan that uses dye to create detailed images of the abdomen and pelvis. This imaging test helps doctors examine internal organs and structures in these areas.
 73 $208 $956
CT scan of head/brain, without contrast
A CT scan uses X-rays to create detailed images of the head or brain without the use of contrast dye.
 71 $32 $106
CT scan of chest with contrast
A computed tomography scan of the chest using a contrast dye to enhance the visibility of internal structures.
 68 $88 $527
Chest X-ray, 2 views
An X-ray imaging test of the chest that captures two different angles to visualize the lungs, heart, and chest wall.
 41 $9 $30
Bone density scan (DEXA)
A test that uses low-dose X-rays to measure bone mineral density in the hip, pelvis, and spine. It helps assess bone strength and risk of fractures.
 39 $36 $127
CT scan of chest, without contrast
A computed tomography scan of the chest area that uses X-rays to create detailed images without the use of contrast dye.
 32 $85 $600
CT scan of upper spine, without contrast
A CT scan uses X-rays to create detailed images of the upper spine. This procedure is performed without the use of contrast dye.
 25 $39 $124
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.
 23 $117 $611
Hip X-ray, 2-3 views
An X-ray imaging test of the hip joint using two to three different angles to visualize the bones and surrounding structures.
 19 $9 $31
X-ray for bone length assessment
An X-ray image is taken to measure and evaluate the length of bones.
 18 $11 $40
MRI of leg joint, without contrast
A magnetic resonance imaging scan of a joint in the leg performed without the use of contrast dye.
 17 $97 $1,192
MRI of abdomen with and without contrast
An MRI scan of the abdomen using contrast dye before and after administration to create detailed images of internal structures.
 17 $257 $1,546
Knee X-ray, 3 views
An X-ray imaging test of the knee joint that captures three different angles to evaluate the bones and surrounding structures.
 16 $8 $26
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.
 16 $248 $1,110
CT scan of leg, without contrast
A computed tomography scan of the leg performed without the use of contrast dye. This imaging test uses X-rays to create detailed cross-sectional images of the leg's internal structures.
 13 $38 $124
Shoulder X-ray, 2+ views
An X-ray imaging test of the shoulder joint using at least two different angles to visualize the bones and surrounding structures.
 12 $8 $26
CT scan of head blood vessels with contrast
A CT scan that uses contrast dye to create detailed images of the blood vessels in the head.
 11 $69 $221
CT scan of neck blood vessels with contrast
A computed tomography scan that uses dye to visualize the blood vessels in the neck. This imaging test helps examine the structure and flow within the neck's vascular system.
 11 $67 $221
CT scan of chest blood vessels with contrast
A CT scan that uses contrast dye to create detailed images of the blood vessels in the chest.
 11 $69 $229
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. A higher procedure volume generally indicates more experience with that procedure.
Looking for a radiation oncology specialist in Tarpon Springs?
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Geographic Context

Radiation oncologists within 10 mi
275
Per 100K population
28.6
County median income
$70,293
Nearest hospital
ADVENTHEALTH NORTH PINELLAS
0.0 mi

Data Sources

Provider Registry ✓ NPPES Weekly updates
Medicare Enrollment ✓ PECOS Monthly updates
Practice Data ✓ Medicare Util. Annual (CY lag)
Industry Payments — No payments N/A
Disciplinary History — Not public N/A

This provider has data in 3 of 4 available federal datasets, with a Data Coverage level of High. This measures how much public data is available about a provider — not how good they are. How we calculate this →

Summary

Dr. Girguis is a mixed practice specialist, with above-average Medicare volume (top 17% in FL), with 19 years of NPI registration.

This summary is auto-generated from federal data. It describes data availability and patterns — not clinical quality. Read our methodology →

Frequently Asked Questions

Is Dr. Girguis experienced with contrast dye for imaging (iodine-based)?
Based on Medicare claims data, Dr. Girguis performed 11,466 contrast dye for imaging (iodine-based) services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
How do Dr. Girguis's costs compare to other radiation oncologists in Tarpon Springs?
Dr. Girguis's average Medicare payment per service is $4. 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 High for Dr. Girguis) 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 a long track record of practice, Medicare participation, and industry disclosure. 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?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →

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About this page

All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, 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. The Transparency Score measures 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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Data Disclaimer — Data sourced from the Centers for Medicare & Medicaid Services (CMS): National Plan and Provider Enumeration System (NPPES), Open Payments program, Medicare Provider Utilization and Payment Data, and Provider Enrollment & Certification data (PECOS). Published under the Freedom of Information Act (FOIA). This website is not affiliated with, endorsed by, or authorized by CMS, HHS, or the U.S. Government. Data may contain errors as reported to CMS by providers and reporting entities. Payments from industry are legal and do not indicate wrongdoing. Medicare data reflects only patients aged 65+ or those with qualifying disabilities. For corrections, contact CMS directly. This information does not constitute medical advice and should not be used as the sole basis for choosing a healthcare provider. Procedure descriptions use plain language and do not reference CPT® codes, which are copyrighted by the American Medical Association. Full methodology → · Report a data error → · Privacy policy →