Dr. William Oppat, M.D.
What this data tells you about Dr. Oppat
Dr. William Oppat is a vascular surgery physician in Novi, MI, with 20 years of NPI registration. Based on federal Medicare data, Dr. Oppat performed 917 Medicare services across 818 unique beneficiaries.
Between the years covered by Open Payments, Dr. Oppat received a total of $9,245 from 29 pharmaceutical and/or device companies across 87 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in vascular surgery 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. Oppat 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. |
281 | $69 | $149 |
| 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. |
119 | $132 | $249 |
| 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. |
81 | $142 | $388 |
| 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. |
71 | $141 | $300 |
| 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. |
65 | $92 | $300 |
| Initial hospital admission, moderate complexity Initial hospital inpatient or observation care for a new patient involving moderate-level medical decision making, with at least 55 minutes total time on the date of the encounter. |
52 | $108 | $280 |
| 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. |
43 | $152 | $385 |
| Ultrasound guidance for blood vessel access Use of ultrasound imaging to help locate and access a blood vessel. This guidance assists healthcare providers in performing procedures such as inserting IV lines or drawing blood. |
35 | $12 | $30 |
| Smoking cessation counseling, 4-10 minutes A brief counseling session focused on helping patients quit smoking and tobacco use. The provider spends 4 to 10 minutes discussing strategies and support for cessation. |
35 | $15 | $30 |
| Complete ultrasound of aorta, vena cava, groin vessels or bypass grafts A complete ultrasound exam of the aorta, vena cava, groin vessels, or bypass grafts. This imaging test uses sound waves to visualize these blood vessels. |
34 | $138 | $420 |
| Office visit, established patient (10-19 min) An office visit for an existing patient lasting 10 to 19 minutes. The visit involves medical evaluation and management of the patient's condition. |
32 | $46 | $120 |
| 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. |
26 | $100 | $200 |
| Ultrasound of leg arteries at rest and after exercise This test uses sound waves to create images of the blood vessels in the legs while the patient is resting and after physical activity to assess blood flow. |
15 | $109 | $315 |
| Ultrasound of leg arteries or grafts An ultrasound exam that uses sound waves to create images of the arteries in one leg or any grafts present in that leg. |
15 | $96 | $320 |
| Complete ultrasound of abdomen and pelvis blood flow This procedure uses sound waves to create images of blood flow in the arteries and veins of the abdomen and pelvis. It evaluates the rate and direction of blood movement within these vessels. |
13 | $203 | $562 |
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 ›
Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
7.5 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. Oppat is a clinical cardiology specialist, with moderate Medicare volume, 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
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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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