Dr. William Ares, MD
What this data tells you about Dr. Ares
Dr. William Ares is a neurological surgery specialist in Evanston, IL, with 15 years of NPI registration. Based on federal Medicare data, Dr. Ares performed 375 Medicare services across 346 unique beneficiaries.
Between the years covered by Open Payments, Dr. Ares received a total of $54,370 from 11 pharmaceutical and/or device companies across 105 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in neurological surgery. The majority of payments are for speaking programs and promotional activities, reflecting participation in industry-sponsored events. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Ares 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.
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 |
|---|---|---|---|
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
45 | $55 | $153 |
| Neck artery catheter insertion with radiology review A tube is inserted into an artery in the neck for diagnostic or treatment purposes. A radiologist reviews the procedure. |
35 | $249 | $1,723 |
| Blood vessel imaging Imaging test to visualize the blood vessels. |
34 | $83 | $312 |
| Radiologist review of image for embolization A radiologist reviews medical images to guide the insertion of material designed to block blood flow. |
33 | $65 | $172 |
| Occlusion of central nervous system or spinal cord artery | 31 | $1,036 | $6,680 |
| 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. |
31 | $105 | $392 |
| New patient office visit, complex (60-74 min) | 31 | $156 | $500 |
| Arterial catheter insertion in neck A tube is inserted into an artery in the neck for diagnostic or treatment purposes. A radiologist reviews the procedure. |
27 | $123 | $505 |
| 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. |
21 | $62 | $230 |
| Spine fusion with cage or mesh device insertion A surgical procedure to fuse spine bones by inserting a cage or mesh device into the disc space. |
19 | $245 | $978 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
19 | $122 | $370 |
| Initial hospital admission, high complexity Initial hospital inpatient or observation care for a new patient involving high-level medical decision making, with at least 75 minutes total time on the date of the encounter. |
19 | $148 | $532 |
| Telephone or internet consultation, 21-30 minutes A remote assessment conducted by a consulting physician via telephone or internet, including verbal discussion and a written report, lasting 21 to 30 minutes. |
16 | $46 | $121 |
| Critical care, first 30-74 min Emergency medical care for a critically ill or injured patient lasting between 30 and 74 minutes. This service involves direct patient care and medical decision making to stabilize the patient. |
14 | $185 | $616 |
Industry Payment Transparency
Open Payments through 2024 ↗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 (2024)
All-time payments by company (2018-2024) ›
Associated products mentioned in payments ›
The majority of payments (70%) are for speaking programs and promotional activities, which reflect participation in industry-sponsored educational or marketing events. This is common in neurological surgery and does not inherently indicate bias, but patients may wish to be aware.
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 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. Ares is a clinical cardiology specialist, with moderate Medicare volume, with speaking/promotional industry engagement in the top 15% of IL peers, with 15 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. 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. 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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