DR. WILLIAM GERARD O'BRIEN (D.C.) – Chiropractor, NPI 1235217795
Chiropractor
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
2,145 CHIROPRACTIC in IL
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Provider Addresses for DR. WILLIAM GERARD O'BRIEN (D.C.)
East Army Trail Road, Glendale Heights, Bloomingdale Township, DuPage County, Illinois, 60139, United States
GLENDALE HEIGHTS, IL 601391757
Phone: (630) 529-6111
Fax: (630) 529-6192
Type: Location
309, Bishop Court, Schick, Bartlett, Wayne Township, DuPage County, Illinois, 60103, United States
BARTLETT, IL 601032983
Phone: (630) 246-2792
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
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: 2007-12-17
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 |
|---|---|---|---|---|
| I20071217000095 | I | Chiropractic | 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 |
|---|---|---|---|---|
| 98941 | Chiropractic manipulative treatment, 3-4 spinal regions | 852 | 70 | $0 |
Insurance plans in this area (ZIP 60139)
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