Medicare Enrolled
Dr. Glenn Kerwin, MD
Radiation Oncology · Marietta, 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. Kerwin 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. Kerwin?
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What this data tells you about Dr. Kerwin
Dr. Glenn Kerwin is a radiation oncology specialist in Marietta, GA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Kerwin performed 1,060 Medicare services across 998 unique beneficiaries.
Between the years covered by Open Payments, Dr. Kerwin received a total of $2,984 from 24 pharmaceutical and/or device companies across 44 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. Kerwin 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
▲ 1,060 Medicare services
$2,984 industry payments
Medicare Practice Summary
Medicare Utilization ↗1,060
Medicare services
Bottom 26% in GA for radiation oncology
Lower Medicare volume may reflect subspecialty focus, hospital-based work, or a higher share of non-Medicare patients.
998
Unique beneficiaries
$38
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~53 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 |
|---|---|---|---|
| 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. |
266 | $7 | $46 |
| Ultrasound-guided fine needle aspiration biopsy, first lesion A biopsy procedure where a thin needle is used to collect tissue samples from a growth, guided by ultrasound imaging. This code applies to the first lesion or mass sampled during the session. |
103 | $108 | $1,822 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
77 | $128 | $757 |
| Sedation by physician, initial 15 minutes Administration of a drug to induce depression of consciousness by the physician performing a procedure. This code covers the initial 15 minutes of sedation for patients aged 5 years or older. |
52 | $10 | $61 |
| Ultrasound-guided fine needle aspiration biopsy, each additional growth This procedure involves using ultrasound guidance to perform a fine needle aspiration biopsy on an additional growth during the same session. |
51 | $47 | $768 |
| Ultrasound of head and neck soft tissue This procedure uses sound waves to create images of the soft tissues in the head and neck area. It allows for the visualization of structures beneath the skin without using radiation. |
44 | $23 | $137 |
| 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. |
39 | $7 | $44 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
34 | $100 | $511 |
| 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. |
32 | $7 | $53 |
| Abdominal X-ray, 1 view An X-ray image of the abdomen taken from a single angle to visualize internal structures. |
27 | $7 | $46 |
| 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. |
25 | $7 | $41 |
| 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. |
25 | $8 | $55 |
| 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. |
25 | $64 | $605 |
| Radiologist review of CT-guided needle placement A radiologist reviews the CT imaging used to guide the placement of a needle. |
23 | $55 | $361 |
| Complete ultrasound of retroperitoneum An ultrasound examination of the structures located behind the abdominal cavity. |
20 | $24 | $176 |
| 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. |
20 | $26 | $164 |
| Abdominal fluid drainage with imaging guidance Removal of fluid from the abdominal cavity using imaging technology to guide the procedure. |
19 | $83 | $506 |
| 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. |
19 | $17 | $108 |
| 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. |
18 | $7 | $44 |
| Foot X-ray, 3+ views An X-ray imaging test of the foot that captures at least three different views to evaluate the bones and joints. |
18 | $6 | $41 |
| X-ray of hand, minimum of 3 views An X-ray imaging test of the hand that captures at least three different angles to visualize the bones and joints. |
17 | $6 | $41 |
| 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. |
17 | $66 | $578 |
| 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. |
16 | $17 | $142 |
| Ankle X-ray, minimum 3 views An X-ray imaging test of the ankle that captures at least three different angles to evaluate the bones and joints. |
14 | $7 | $41 |
| Elbow X-ray, minimum 3 views An X-ray imaging test of the elbow joint that captures at least three different angles to visualize the bones and surrounding structures. |
13 | $7 | $41 |
| CT scan of chest with contrast A computed tomography scan of the chest using a contrast dye to enhance the visibility of internal structures. |
12 | $42 | $297 |
| X-ray of thigh bone, minimum 2 views An X-ray imaging test of the thigh bone using at least two different angles to visualize the bone structure. |
12 | $6 | $47 |
| 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 | $68 | $462 |
| 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. |
11 | $30 | $146 |
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 ↗$2,984
Total received (2018-2024)
Avg $426/year across 7 years
Top 10% in GA for radiation oncology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
24
Companies
44
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
$2,968 (99.5%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$16 (0.5%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$619
2023
$485
2022
$403
2021
$302
2020
$58
2019
$674
2018
$444
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Boston Scientific Corporation
$149
Terumo Medical Corporation
$136
CARDIVA MEDICAL, INC.
$125
Penumbra, Inc.
$122
TriSalus Life Sciences, Inc.
$58
Sirtex Medical Inc
$30
Top 3 companies account for 66.1% of 2024 payments
All-time payments by company (2018-2024) ›
Penumbra, Inc.
$537
Medtronic USA, Inc.
$398
Boston Scientific Corporation
$377
Terumo Medical Corporation
$289
ARGON MEDICAL DEVICES, INC.
$233
Bard Peripheral Vascular, Inc.
$223
Inari Medical, Inc.
$158
Biocompatibles, Inc.
$137
CARDIVA MEDICAL, INC.
$125
Merit Medical Systems Inc
$112
Siemens Medical Solutions USA, Inc.
$71
TriSalus Life Sciences, Inc.
$58
Medtronic, Inc.
$50
Merck Sharp & Dohme Corporation
$32
BOSTON SCIENTIFIC CORPORATION
$30
Sirtex Medical Inc
$30
Abbott Laboratories
$21
AngioDynamics, Inc.
$18
Agios Pharmaceuticals, Inc.
$18
Amgen Inc.
$16
AMAG Pharmaceuticals, Inc.
$16
Takeda Pharmaceuticals U.S.A., Inc.
$14
Seattle Genetics, Inc.
$11
Eisai Inc.
$11
Top 3 companies account for 44.0% of all-time payments
Associated products mentioned in payments ›
AZUR CX DETACHABLE · CARDIOMEMS · CARDIVA VASCADE 6/7F VCS · EMBOLD Fibered · EkoSonic · FERAHEME · FLOWTRIEVER CATHETER · GENERAL - VASCULAR INTERVENTION · Halaven · JETSTREAM · KEYTRUDA · KYPHON Balloon Kyphoplasty · KYPHON EXPRESS II KYPHOPAK TRAY · LAVA LES (Liquid Embolic System) · MARQUEE · NAVICROSS · NINLARO · Neulasta · OSTEOCOOL RF ABLATION · PADCEV · Penumbra Ruby Coil · RUBY Coil · S · Solitaire · SwiftNINJA Sterble Cor Micro · TIBSOVO · TIPS · TRINAV INFUSION SYSTEM · TheraSphere Y90 Glass Microspheres 10 GBq · VISUAL-ICE · Varian CRYOCARE TOUCH System · WALLSTENT
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. Total industry engagement is in the top 10% for radiation oncology in GA.
Geographic Context
Radiation oncologists within 10 mi
432
Per 100K population
56.2
County median income
$98,712
Nearest hospital
WELLSTAR KENNESTONE REGIONAL MEDICAL CENTER
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. Kerwin is a mixed practice specialist, with moderate Medicare volume, with low-engagement industry engagement in the top 10% of GA peers, 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. Kerwin experienced with chest x-ray, 1 view?
Based on Medicare claims data, Dr. Kerwin performed 266 chest x-ray, 1 view 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. Kerwin receive payments from pharmaceutical companies?
Yes. Dr. Kerwin received a total of $2,984 from 24 companies across 44 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. Kerwin's costs compare to other radiation oncologists in Marietta?
Dr. Kerwin's average Medicare payment per service is $38. 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. Kerwin) 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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