WILLIAM J O'BRIEN (MD) – Surgery Physician, NPI 1831101955
Surgery Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
1,422 GENERAL SURGERY in IL
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Provider Addresses for WILLIAM J O'BRIEN (MD)
2357, Sequoia Drive, Aurora, Kane County, Illinois, 60506, United States
AURORA, IL 605066222
Phone: (630) 859-6800
Type: Mailing
Advocate Medical Group Outpatient Center, 1221, North Highland Avenue, Aurora, Kane County, Illinois, 60506, United States
AURORA, IL 605061404
Phone: (630) 859-8700
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 2 Open Payments records for all available years, with a total value of $149.
Total Amount is formed as General ($149) + Research ($0) + Ownership ($0) = $149.
Last reported payment date: 2023-09-21 • Largest payer in this snapshot: OSSIO INC ($149).
Total Amount
$149
General + Research + Ownership
Payments
2
Total payment records
General Amount
$149
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-09-21
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| OSSIO INC | $149 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2005-02-28
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20050228000040 | I | General Surgery | IL | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 93880 | Ultrasound of both sides of head and neck blood flow | 230 | 230 | $0 |
| 93970 | Ultrasound study of arm or leg veins with compression and maneuvers | 98 | 94 | $0 |
| 93925 | Ultrasound of leg arteries or artery grafts | 63 | 63 | $0 |
| 99212 | Established patient office or other outpatient visit, 10-19 minutes | 56 | 32 | $0 |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 50 | 50 | $0 |
Insurance plans in this area (ZIP 60506)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| GENERAL SURGERY | IL | 93971 | Ultrasound scan of veins of one arm or leg or limited including assessment of compression and functional maneuvers | 73 | 62 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Nephrology, Internal Medicine | IL | |
| A N E S T H E S I O L O G Y | IL | |
| - | MN | |
| - | IL | |
| - | IL | |
| Rheumatology, Internal Medicine | IL | |
| - | IL | |
| Internal Medicine | IL | |
| P S Y C H I A T R Y | IL | |
| - | IL |
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