Dr. Mark Gonwa, MD
What this data tells you about Dr. Gonwa
Dr. Mark Gonwa is a radiation oncology specialist in West Palm Beach, FL, with 19 years of NPI registration. Based on federal Medicare data, Dr. Gonwa performed 10,282 Medicare services across 2,652 unique beneficiaries.
Between the years covered by Open Payments, Dr. Gonwa received a total of $1,573 from 8 pharmaceutical and/or device companies across 19 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in radiation oncology. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Gonwa is Very 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.
Medicare Practice Summary
Medicare Utilization ↗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) | 7,570 | $0 | $4 |
| Chest X-ray, 1 view | 899 | $7 | $72 |
| CT scan of chest, without contrast | 250 | $109 | $932 |
| Chest X-ray, 2 views | 223 | $23 | $114 |
| Ct scan of upper spine without contrast | 207 | $37 | $374 |
| X-ray of knee, 1-2 views | 73 | $6 | $89 |
| Ultrasound study of arm or leg veins with compression and maneuvers | 65 | $27 | $471 |
| CT scan of head/brain, without contrast | 58 | $84 | $777 |
| Fine needle aspiration biopsy using ultrasound guidance, first growth | 48 | $112 | $471 |
| X-ray of abdomen, 1 view | 44 | $22 | $104 |
| X-ray of knee, 4 or more views | 41 | $9 | $106 |
| CT scan of abdomen and pelvis with contrast | 41 | $256 | $1,048 |
| Ct scan of face without contrast | 39 | $32 | $367 |
| Ct scan of abdomen and pelvis without contrast | 38 | $151 | $1,017 |
| Drainage of fluid from abdominal cavity using imaging guidance | 36 | $87 | $1,113 |
| Ct scan of lower spine without contrast | 35 | $37 | $374 |
| X-ray of pelvis, 1-2 views | 35 | $7 | $77 |
| X-ray of wrist, minimum of 3 views | 35 | $6 | $84 |
| Review by radiologist of ct guidance for needle placement | 34 | $57 | $460 |
| Foot X-ray, 3+ views | 31 | $7 | $94 |
| Fluoroscopic guidance for insertion or removal of central vein access device | 28 | $15 | $142 |
| X-ray of ribs on side of body, minimum of 3 views | 27 | $13 | $126 |
| Biopsy and aspiration of bone marrow sample for diagnosis | 26 | $62 | $839 |
| X-ray of ankle, minimum of 3 views | 26 | $7 | $114 |
| Ct scan of chest with contrast | 25 | $120 | $1,120 |
| Limited ultrasound scan of abdomen | 23 | $23 | $215 |
| X-ray of hand, minimum of 3 views | 22 | $7 | $92 |
| Insertion of tunneled central venous tube for infusion (5 years or older) | 21 | $218 | $4,841 |
| Imaging for evaluation of swallowing function | 21 | $93 | $461 |
| Nuclear medicine study of bone and/or joint whole body | 21 | $222 | $624 |
| Shoulder X-ray, 2+ views | 19 | $24 | $104 |
| X-ray of elbow, 2 views | 19 | $7 | $66 |
| X-ray of lower and sacral spine, minimum of 4 views | 18 | $42 | $183 |
| Ct scan of middle spine without contrast | 18 | $38 | $363 |
| X-ray of lower leg, 2 views | 18 | $6 | $68 |
| Ultrasonic guidance for needle placement | 18 | $25 | $263 |
| Aspiration of fluid from chest cavity using imaging guidance | 17 | $89 | $2,689 |
| Hip X-ray, 2-3 views | 17 | $35 | $217 |
| Ct scan of blood vessels of abdomen and pelvis with contrast | 17 | $85 | $799 |
| Double contrast x-ray of esophagus | 17 | $91 | $393 |
| X-ray of lower and sacral spine, 2-3 views | 15 | $28 | $151 |
| Fine needle aspiration biopsy using ultrasound guidance, each additional growth | 13 | $50 | $227 |
| X-ray of thigh bone, minimum 2 views | 12 | $7 | $88 |
| X-ray of elbow, minimum of 3 views | 11 | $7 | $65 |
| Ultrasound study of one arm or leg veins with compression and maneuvers | 11 | $97 | $344 |
Industry Payment Transparency
Open Payments through 2023 ↗Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
Payments by company (2023)
Associated products mentioned in payments ›
Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2023 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This measures how much public data is available about a provider — not how good they are. How we calculate this →
Summary
Dr. Gonwa is a mixed practice specialist, with above-average Medicare volume (top 20% in FL), with low-engagement industry engagement, 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. Gonwa experienced with contrast dye for imaging (iodine-based)?
Does Dr. Gonwa receive payments from pharmaceutical companies?
How do Dr. Gonwa's costs compare to other radiation oncologists in West Palm Beach?
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All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): 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. 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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