Sean Mcwilliams, MD
NPI 1356323398 · Phlebology Physician · Wheaton, IL
Enrolled with Medicare as Practitioner - General Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sean Mcwilliams, MD is a Phlebology Physician provider in Wheaton, IL (NPI 1356323398).
Provider details
- NPI number
- 1356323398
- Entity type
- Individual
- Primary specialty
- Phlebology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036096961 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
687 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Ultrasonic Guidance for Needle Placement76942 | 127 | $59 |
| Ultrasound Study of Arm Or Leg Veins With Compression and Maneuvers93970 | 113 | $193 |
| Injection of Chemical Agent Into Multiple Incompetent Veins of Leg36471 | 96 | $208 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 59 | $58 |
| Injection of Chemical Agent Into Single Incompetent Vein of Leg Using Ultrasound Guidance36465 | 58 | $1,314 |
| Ultrasound Study of One Arm Or Leg Veins With Compression and Maneuvers93971 | 56 | $122 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$19,480 across 9 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-16
- Last updated
- 2024-04-25
- Certified
- 2024-04-25
Frequently asked questions
- What is Sean Mcwilliams's NPI number?
- Sean Mcwilliams's National Provider Identifier (NPI) is 1356323398, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sean Mcwilliams's specialty?
- Sean Mcwilliams is listed in the NPPES registry with a primary specialty of Phlebology Physician (Allopathic & Osteopathic Physicians).
- Where is Sean Mcwilliams located?
- Sean Mcwilliams's practice location on file with NPPES is 180 Danada Sq W, Wheaton, IL 60189-2041.
- What is Sean Mcwilliams's phone number?
- The practice phone number listed in the NPPES registry for Sean Mcwilliams is (630) 474-2600.
- Does Sean Mcwilliams accept Medicare?
- Sean Mcwilliams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sean Mcwilliams's NPI active?
- Yes — Sean Mcwilliams's NPI (1356323398) is active in the NPPES registry as of the last update on 2024-04-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.