Medicare Enrolled
Dr. John Tonkin, M.D.
Vascular & Interventional Radiology Physician · Gainesville, GA
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Low-engagement
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. Tonkin 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. Tonkin
Dr. John Tonkin is a vascular & interventional radiology physician in Gainesville, GA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Tonkin performed 27,070 Medicare services across 1,751 unique beneficiaries.
Between the years covered by Open Payments, Dr. Tonkin received a total of $2,542 from 14 pharmaceutical and/or device companies across 40 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in vascular & interventional radiology physician. 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. Tonkin 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.
✓ 20 years in practice
▲ Top 2% volume in GA
$2,542 industry payments
Medicare Practice Summary
Medicare Utilization ↗27,070
Medicare services
Top 2% in GA for vascular & interventional radiology physician
1,751
Unique beneficiaries
$6
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~1,354 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. |
22,766 | $0 | $2 |
| MRI contrast dye injection (gadoterate) Administration of gadoterate meglumine, a contrast agent, in a 0.1 ml dose. |
2,740 | $0 | $1 |
| 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. |
269 | $7 | $32 |
| 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. |
134 | $31 | $138 |
| Ultrasound of arm or leg veins An ultrasound exam of the veins in one arm or leg using compression and other maneuvers to assess blood flow and check for blockages. |
121 | $85 | $323 |
| Steroid injection (triamcinolone) A 10 mg injection of triamcinolone acetonide, a corticosteroid medication. This code specifies the drug and dosage administered. |
108 | $1 | $10 |
| Ultrasound of head and neck blood flow, bilateral An ultrasound exam that uses sound waves to visualize and assess blood flow in the vessels of both the head and the neck. |
88 | $139 | $400 |
| 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. |
75 | $105 | $800 |
| Ultrasound of arm or leg veins An ultrasound exam of the veins in the arm or leg. The test uses sound waves to check blood flow and may include compression and other maneuvers. |
59 | $139 | $400 |
| CT scan of heart blood vessels and grafts with contrast A CT scan that uses contrast dye to create detailed images of the heart's blood vessels and any surgical grafts. |
54 | $223 | $820 |
| 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. |
40 | $187 | $1,000 |
| Telephone or electronic consultation, at least 5 minutes A remote assessment and management service provided by a consulting physician via telephone, internet, or electronic health record. The service requires at least 5 minutes of time and includes a written report. |
40 | $29 | $147 |
| 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. |
38 | $184 | $1,000 |
| CT scan of abdominal and pelvic blood vessels with contrast A computed tomography scan that uses contrast dye to visualize the blood vessels in the abdomen and pelvis. |
37 | $297 | $2,000 |
| 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. |
36 | $36 | $145 |
| CT scan of abdominal aorta and leg arteries with contrast A CT scan that uses contrast dye to create detailed images of the abdominal aorta and the arteries in both legs. |
31 | $218 | $1,198 |
| 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. |
28 | $129 | $1,600 |
| 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. |
26 | $242 | $1,800 |
| Fluoroscopic guidance for needle placement Use of real-time X-ray imaging to guide the precise placement of a needle during a medical procedure. |
26 | $89 | $187 |
| MRI of head blood vessels without contrast An MRI scan that creates detailed images of the blood vessels in the head without using contrast dye. |
24 | $150 | $1,182 |
| Esophagram with single contrast An X-ray of the esophagus using a single type of contrast material to visualize the structure and function of the upper digestive tract. |
24 | $76 | $200 |
| Joint injection, major joint Removal of fluid from a large joint and/or injection of medication into the joint space. |
23 | $52 | $135 |
| Ultrasound of arm and leg arteries This procedure uses sound waves to create images of the blood vessels in the arms and legs. It allows healthcare providers to examine the structure and blood flow within these arteries. |
19 | $60 | $225 |
| CT scan of chest with contrast A computed tomography scan of the chest using a contrast dye to enhance the visibility of internal structures. |
18 | $107 | $900 |
| Fluoroscopic guidance for central vein access device Use of live X-ray imaging to guide the placement or removal of a central vein access device. |
18 | $15 | $43 |
| MRI scan of brain, without contrast A magnetic resonance imaging test of the brain that does not use contrast dye. This procedure creates detailed images of the brain's structure using magnetic fields and radio waves. |
17 | $56 | $224 |
| 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. |
17 | $22 | $125 |
| Radiologist review of CT-guided needle placement A radiologist reviews the CT imaging used to guide the placement of a needle. |
17 | $57 | $150 |
| CT brain blood flow, volume, and timing with contrast A CT scan that uses contrast dye to analyze blood flow, volume, and timing within the brain. |
16 | $166 | $270 |
| 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. |
16 | $204 | $1,000 |
| Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries | 16 | $401 | $500 |
| Pelvis X-ray, 1-2 views An X-ray imaging test of the pelvic area using one to two different angles to visualize the bones and joints. |
15 | $7 | $22 |
| Ultrasound of arm and leg arteries A non-invasive imaging test that uses sound waves to examine the blood vessels in the arms and legs. It evaluates blood flow and checks for blockages or other vascular issues. |
15 | $93 | $244 |
| 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. |
14 | $277 | $1,959 |
| Complete ultrasound of retroperitoneum An ultrasound examination of the structures located behind the abdominal cavity. |
14 | $81 | $350 |
| Central venous port insertion A surgical procedure to place a small reservoir under the skin for long-term access to the bloodstream. The device is connected to a vein to allow for repeated medication administration or blood draws. |
13 | $273 | $706 |
| Abdominal X-ray, 1 view An X-ray image of the abdomen taken from a single angle to visualize internal structures. |
13 | $20 | $100 |
| 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. |
12 | $1,213 | $3,000 |
| MRI of brain with and without contrast An MRI scan of the brain using contrast dye both before and after administration to provide detailed images of brain structures. |
11 | $88 | $275 |
| 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. |
11 | $6 | $26 |
| Limited abdominal ultrasound A focused ultrasound examination of the abdomen to evaluate specific organs or areas. This procedure uses sound waves to create images of internal structures. |
11 | $23 | $93 |
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.
Industry Payment Transparency
Open Payments through 2024 ↗$2,542
Total received (2018-2024)
Avg $363/year across 7 years
Top 48% in GA for vascular & interventional radiology physician
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
14
Companies
40
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →
Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$2,542 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$135
2023
$214
2022
$193
2021
$185
2020
$422
2019
$40
2018
$1,353
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Penumbra, Inc.
$112
Terumo Medical Corporation
$23
Top 3 companies account for 100.0% of 2024 payments
All-time payments by company (2018-2024) ›
Canon Medical Systems USA, Inc.
$1,337
Inari Medical, Inc.
$567
Stryker Corporation
$161
Penumbra, Inc.
$153
ARGON MEDICAL DEVICES, INC.
$109
Siemens Medical Solutions USA, Inc.
$68
GE HEALTHCARE
$27
Terumo Medical Corporation
$23
Alexion Pharmaceuticals, Inc.
$22
SUN PHARMACEUTICAL INDUSTRIES INC.
$17
Novartis Pharmaceuticals Corporation
$17
E.R. Squibb & Sons, L.L.C.
$16
Medtronic Vascular, Inc.
$13
Verastem, Inc.
$12
Top 3 companies account for 81.3% of all-time payments
Associated products mentioned in payments ›
AZUR CX DETACHABLE · Artis Q ceiling · Artis Q.zen · Benchmark · CLEANER · Copiktra · FLOWTRIEVER CATHETER · FlowTriever · Indigo System · MEKINIST · OPDIVO · RUBY Coil · S · SPINEJACK · Ultomiris · Valiant Navion · YONSA
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. 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 →
Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Vascular & interventional radiology physicians within 10 mi
4
Per 100K population
1.9
County median income
$77,430
Nearest hospital
NORTHEAST GEORGIA MEDICAL CENTER, INC
0.0 mi
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 2024 |
| 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 reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Tonkin is a mixed practice specialist, with above-average Medicare volume (top 2% in GA), with low-engagement industry engagement, with 20 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. Tonkin experienced with contrast dye for imaging (iodine-based)?
Based on Medicare claims data, Dr. Tonkin performed 22,766 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.
Does Dr. Tonkin receive payments from pharmaceutical companies?
Yes. Dr. Tonkin received a total of $2,542 from 14 companies across 40 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. 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. Tonkin's costs compare to other vascular & interventional radiology physicians in Gainesville?
Dr. Tonkin's average Medicare payment per service is $6. 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. Tonkin) 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 ↗, 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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