Dr. Darren Chapman, M.D.
What this data tells you about Dr. Chapman
Dr. Darren Chapman is a radiation oncology in Lakeland, FL, with 18 years in practice. Based on federal Medicare data, Dr. Chapman performed 5,044 Medicare services across 4,320 unique beneficiaries.
Between the years covered by Open Payments, Dr. Chapman received a total of $46,817 from 1 pharmaceutical and/or device company across 4 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in radiation oncology. The majority of payments are classified as research and scientific activities (grants and research funding). Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Chapman 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 |
|---|---|---|---|
| Chest X-ray, 1 view | 1,620 | $6 | $35 |
| CT scan of head/brain, without contrast | 295 | $30 | $250 |
| Imaging for evaluation of swallowing function | 189 | $19 | $97 |
| Ultrasound of both sides of head and neck blood flow | 179 | $29 | $112 |
| Ct scan of abdomen and pelvis without contrast | 177 | $63 | $320 |
| X-ray of abdomen, 1 view | 132 | $7 | $35 |
| CT scan of abdomen and pelvis with contrast | 128 | $64 | $340 |
| Bone density scan (DEXA) | 125 | $9 | $54 |
| Complete ultrasound scan behind abdominal cavity | 123 | $26 | $134 |
| Nuclear medicine studies of heart muscle at rest and with stress and spect | 111 | $55 | $297 |
| CT scan of chest, without contrast | 100 | $38 | $211 |
| Mri scan of brain without contrast | 96 | $53 | $271 |
| Ct scan of blood vessels of chest with contrast | 86 | $62 | $353 |
| Hip X-ray, 2-3 views | 77 | $8 | $44 |
| Ultrasound study of arm or leg veins with compression and maneuvers | 74 | $25 | $130 |
| Ultrasound study of one arm or leg veins with compression and maneuvers | 74 | $17 | $85 |
| Ultrasound of leg arteries or artery grafts | 67 | $29 | $109 |
| X-ray of knee, 1-2 views | 64 | $6 | $32 |
| Limited ultrasound scan of abdomen | 64 | $21 | $109 |
| Ct scan of blood vessels of neck with contrast | 59 | $58 | $323 |
| Ct scan of chest with contrast | 57 | $40 | $226 |
| Chest X-ray, 2 views | 54 | $24 | $75 |
| 3D screening mammography (tomosynthesis) | 53 | $29 | $120 |
| Shoulder X-ray, 2+ views | 52 | $6 | $33 |
| Screening mammography | 52 | $36 | $151 |
| Ct scan of blood vessels of head with contrast | 51 | $64 | $321 |
| Ct scan of upper spine without contrast | 46 | $35 | $211 |
| Foot X-ray, 3+ views | 45 | $6 | $32 |
| Ct scan of lower spine without contrast | 44 | $36 | $211 |
| X-ray of abdomen, 2 views | 38 | $8 | $44 |
| Mri scan of lower spinal canal without contrast | 37 | $54 | $271 |
| Ultrasound scan of head and neck soft tissue | 37 | $19 | $102 |
| X-ray of pelvis, 1-2 views | 36 | $6 | $32 |
| Double contrast x-ray of upper digestive tract | 35 | $33 | $127 |
| Computed tomography (ct) of brain blood flow, volume, and timing of flow analysis with contrast | 33 | $169 | $321 |
| Ct scan of blood vessels of abdomen and pelvis with contrast | 33 | $80 | $408 |
| Mri scan of brain before and after contrast | 29 | $83 | $431 |
| X-ray of lower and sacral spine, 2-3 views | 28 | $8 | $40 |
| Knee X-ray, 3 views | 27 | $7 | $33 |
| Ct scan of pelvis without contrast | 25 | $39 | $200 |
| Ct scan of soft tissue of neck with contrast | 21 | $47 | $253 |
| X-ray of ankle, minimum of 3 views | 21 | $6 | $32 |
| Mri scan of leg without contrast | 21 | $51 | $246 |
| Mri scan of leg joint without contrast | 21 | $44 | $246 |
| Complete ultrasound scan of abdomen | 21 | $27 | $148 |
| Aspiration of fluid from chest cavity using imaging guidance | 20 | $82 | $440 |
| X-ray of lower and sacral spine, minimum of 4 views | 18 | $8 | $55 |
| Mri scan of upper spinal canal without contrast | 18 | $52 | $292 |
| Mri scan of blood vessels of head without contrast | 17 | $43 | $220 |
| X-ray of hand, minimum of 3 views | 16 | $6 | $32 |
| Ct scan of abdomen and pelvis before and after contrast | 15 | $70 | $380 |
| Double contrast x-ray of esophagus | 15 | $20 | $121 |
| Nuclear medicine study of lung circulation | 15 | $23 | $136 |
| X-ray of upper spine, 4-5 views | 14 | $10 | $55 |
| Mri scan of middle spinal canal without contrast | 14 | $55 | $292 |
| X-ray of thigh bone, minimum 2 views | 14 | $7 | $37 |
| X-ray of lower leg, 2 views | 14 | $6 | $32 |
| Ultrasound scan of chest | 14 | $20 | $100 |
| X-ray of upper spine, 2-3 views | 13 | $7 | $40 |
| Mri scan of abdomen before and after contrast | 13 | $80 | $413 |
| X-ray of wrist, minimum of 3 views | 12 | $7 | $32 |
| Mri scan of abdomen without contrast | 12 | $47 | $267 |
| Ct scan of face without contrast | 11 | $32 | $207 |
| X-ray of both hips, 2 views | 11 | $8 | $45 |
| Review by radiologist of bile and/or pancreatic duct image during surgery | 11 | $6 | $67 |
Industry Payment Transparency
Open Payments through 2021 ↗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 (2021)
Associated products mentioned in payments ›
The majority of payments (78%) are classified as scientific/research, suggesting involvement in clinical studies, grants, or innovation-related work. Total industry engagement is in the top 2% for radiation oncology in FL.
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 2021 |
| 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. Chapman is a mixed practice specialist, with moderate Medicare volume, and high industry engagement (research-focused, top 2%), with 18 years of practice experience.
This summary is auto-generated from federal data. It describes data availability and patterns — not clinical quality. Read our methodology →
Frequently Asked Questions
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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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