Physician Profile
Based in Wheaton, IL, Sean D. McWilliams, MD is listed in the NPI registry under general practice. Sean is also listed as specializing in family medicine and vascular surgery. According to Medicare claims data, Sean cared for 435 Medicare patients across 687 services. The services billed most often include ultrasonic guidance for needle placement, ultrasound study of arm or leg veins with compression and maneuvers, and injection of chemical agent into multiple incompetent veins of leg.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
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Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
180 DANADA SQ W
Wheaton, IL 60189
Within General Practice generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
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687 services · 435 patients · 12 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Injection of chemical agent into multiple incompetent veins of leg | Procedure | 36471 |
96 | Too few peers to compare |
| Injection of chemical agent into single incompetent vein of leg using ultrasound guidance | Procedure | 36465 |
58 | Too few peers to compare |
| Destruction of first incompetent vein of arm or leg using radiofrequency and imaging guidance | Procedure | 36475 |
42 | Too few peers to compare |
| Injection of chemical agent into single incompetent vein | Procedure | 36470 |
41 | Too few peers to compare |
| Chemical destruction of first incompetent vein of arm or leg using imaging guidance | Procedure | 36482 |
23 | Too few peers to compare |
| Ultrasonic guidance for needle placement | Imaging | 76942 |
127 | Too few peers to compare |
| Ultrasound study of arm or leg veins with compression and maneuvers | Treatment | 93970 |
113 | Too few peers to compare |
| Ultrasound study of one arm or leg veins with compression and maneuvers | Treatment | 93971 |
56 | Too few peers to compare |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
59 | More often than most peers in GENERAL PRACTICE |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
32 | Less often than most peers in GENERAL PRACTICE |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Dr. McWilliams is a general practice in Wheaton, IL. That is the designation recorded for this NPI in the federal registry.
NPI registry
Dr. McWilliams is listed at 180 Danada Sq W, Wheaton, IL 60189. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
The number on file is (630) 474-2600. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
Dr. McWilliams's National Provider Identifier is 1356323398. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Dr. McWilliams attended Other, graduating in 1995. This comes from the CMS National Downloadable File.
CMS public data
Dr. McWilliams has 31 years experience. Calculated from a graduation year of 1995, reported in the CMS National Downloadable File.
CMS public data
According to Medicare billing data, Dr. McWilliams performs procedures including injection of chemical agent into multiple incompetent veins of leg, injection of chemical agent into single incompetent vein of leg using ultrasound guidance and destruction of first incompetent vein of arm or leg using radiofrequency and imaging guidance; reads or performs imaging such as ultrasonic guidance for needle placement; provides treatments such as ultrasound study of arm or leg veins with compression and maneuvers and ultrasound study of one arm or leg veins with compression and maneuvers, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Not yet. This profile is built from public federal data and has not been confirmed by Dr. McWilliams. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.