Dr. Malcolm Williamson, MD
What this data tells you about Dr. Williamson
Dr. Malcolm Williamson is a neuroradiology physician in Ocala, FL, with 20 years in practice. Based on federal Medicare data, Dr. Williamson performed 16,541 Medicare services across 3,871 unique beneficiaries.
Between the years covered by Open Payments, Dr. Williamson received a total of $57 from 3 pharmaceutical and/or device companies across 3 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in neuroradiology 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. Williamson 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) | 11,010 | $0 | $2 |
| Chest X-ray, 1 view | 1,157 | $6 | $38 |
| MRI contrast dye injection (gadobutrol) | 950 | $0 | $5 |
| Injection, gadobenate dimeglumine (multihance), per ml | 759 | $1 | $9 |
| Ct scan of blood vessels of chest with contrast | 174 | $64 | $385 |
| Chest X-ray, 2 views | 168 | $23 | $113 |
| 3D screening mammography (tomosynthesis) | 137 | $52 | $231 |
| Screening mammography | 137 | $124 | $505 |
| Mri scan of lower spinal canal without contrast | 108 | $142 | $905 |
| Ct scan of blood vessels of neck with contrast | 95 | $63 | $360 |
| Ct scan of blood vessels of head with contrast | 88 | $64 | $375 |
| CT scan of chest, without contrast | 86 | $93 | $715 |
| Knee X-ray, 3 views | 82 | $7 | $41 |
| Shoulder X-ray, 2+ views | 65 | $6 | $43 |
| Ultrasound study of one arm or leg veins with compression and maneuvers | 63 | $16 | $92 |
| Mri scan of brain before and after contrast | 53 | $233 | $1,579 |
| X-ray of pelvis, 1-2 views | 50 | $6 | $39 |
| Mri scan of upper spinal canal without contrast | 49 | $138 | $914 |
| X-ray of hand, minimum of 3 views | 49 | $6 | $36 |
| X-ray of ankle, minimum of 3 views | 49 | $6 | $39 |
| Ct scan of blood vessels of abdomen and pelvis with contrast | 49 | $82 | $450 |
| Ct scan of pelvis without contrast | 48 | $38 | $224 |
| X-ray of knee, 1-2 views | 48 | $6 | $39 |
| Ultrasound study of arm or leg veins with compression and maneuvers | 48 | $23 | $196 |
| Ultrasound scan of head and neck soft tissue | 46 | $80 | $452 |
| Complete ultrasound scan behind abdominal cavity | 45 | $82 | $441 |
| Mri scan of brain without contrast | 43 | $126 | $868 |
| Diagnostic digital breast tomosynthesis, unilateral or bilateral (list separately in addition to 77065 or 77066) | 42 | $39 | $219 |
| CT scan of abdomen and pelvis with contrast | 41 | $221 | $1,205 |
| Complete ultrasound scan of 1 breast | 36 | $74 | $636 |
| X-ray of wrist, minimum of 3 views | 35 | $6 | $38 |
| X-ray of lower and sacral spine, 2-3 views | 34 | $25 | $140 |
| Ct scan of middle spine without contrast | 34 | $35 | $203 |
| X-ray of lower leg, 2 views | 33 | $6 | $37 |
| X-ray of abdomen, 1 view | 32 | $22 | $98 |
| Ct scan of abdomen and pelvis before and after contrast | 32 | $269 | $1,407 |
| Ct scan of middle spine with contrast | 31 | $43 | $248 |
| Computed tomography (ct) of brain blood flow, volume, and timing of flow analysis with contrast | 29 | $174 | $270 |
| X-ray of thigh bone, minimum 2 views | 29 | $7 | $40 |
| X-ray of elbow, minimum of 3 views | 28 | $5 | $38 |
| Mri scan of middle spinal canal without contrast | 26 | $127 | $896 |
| Ct scan of chest with contrast | 25 | $105 | $836 |
| X-ray of upper spine, 2-3 views | 24 | $27 | $135 |
| Diagnostic mammography of 1 breast | 24 | $80 | $510 |
| Ct scan of lower spine with contrast | 23 | $42 | $249 |
| Ct scan of abdomen and pelvis without contrast | 23 | $136 | $810 |
| Ct scan of lower spine without contrast | 22 | $99 | $692 |
| Diagnostic mammography of both breasts | 21 | $109 | $624 |
| CT scan of head/brain, without contrast | 20 | $78 | $464 |
| Ct scan of face without contrast | 19 | $92 | $587 |
| Ct scan of soft tissue of neck with contrast | 19 | $147 | $934 |
| X-ray of upper arm, minimum of 2 views | 19 | $5 | $38 |
| X-ray of forearm, 2 views | 17 | $5 | $34 |
| Ct scan of leg without contrast | 17 | $35 | $215 |
| Ultrasound of both sides of head and neck blood flow | 17 | $31 | $166 |
| X-ray of ribs on side of body, minimum of 3 views | 16 | $9 | $54 |
| Low dose ct scan of chest for lung cancer screening | 16 | $138 | $932 |
| Foot X-ray, 3+ views | 14 | $27 | $118 |
| Ct scan of upper spine without contrast | 13 | $89 | $737 |
| X-ray of both hips, 3-4 views | 13 | $35 | $218 |
| Imaging for evaluation of swallowing function | 13 | $21 | $109 |
| Limited ultrasound scan of abdomen | 13 | $57 | $371 |
| Mri scan of lower spinal canal before and after contrast | 12 | $77 | $471 |
| Complete ultrasound scan of abdomen | 12 | $84 | $487 |
| Hip X-ray, 2-3 views | 11 | $30 | $191 |
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 ›
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 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. Williamson is a mixed practice specialist, with above-average Medicare volume (top 11% in FL), and low-engagement industry engagement, with 20 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
Is Dr. Williamson experienced with contrast dye for imaging (iodine-based)?
Does Dr. Williamson receive payments from pharmaceutical companies?
How do Dr. Williamson's costs compare to other neuroradiology physicians in Ocala?
What does Data Coverage mean?
Is this data up to date?
Explore related providers
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.
Provider corrections: Provider portal · Privacy questions: Privacy Policy · Terms: Terms of Use · Methodology: Methodology