AMY O'BRIAN THOMAS (M.D.) – Allergy & Immunology Physician, NPI 1134359862
Allergy & Immunology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
222 ALLERGY/IMMUNOLOGY in IL
Provider Addresses for AMY O'BRIAN THOMAS (M.D.)
6155 GRAND AVE STE 200
GURNEE, IL 600311651
Phone: (847) 535-7647
Fax: (224) 271-6642
Type: Location
2357, Sequoia Drive, Aurora, Kane County, Illinois, 60506, United States
AURORA, IL 605066222
Phone: (630) 859-6800
Type: Mailing
2285, Sequoia Drive, Aurora, Kane County, Illinois, 60506, United States
AURORA, IL 605066209
Phone: (630) 859-6700
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 13 Open Payments records for all available years, with a total value of $505.
Total Amount is formed as General ($505) + Research ($0) + Ownership ($0) = $505.
Last reported payment date: 2024-11-15 • Largest payer in this snapshot: GlaxoSmithKline, LLC. ($196).
Total Amount
$505
General + Research + Ownership
Payments
13
Total payment records
General Amount
$505
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-15
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| GlaxoSmithKline, LLC. | $196 |
| GENZYME CORPORATION | $195 |
| Regeneron Healthcare Solutions, Inc. | $115 |
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: 2015-08-12
PECOS data refreshed: 2026-06-15
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 |
|---|---|---|---|---|
| I20150812006241 | I | Allergy/Immunology | 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 |
|---|---|---|---|---|
| 95004 | Test for allergy using allergenic extract | 298 | 12 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 32 | 14 | $0 |
Insurance plans in this area (ZIP 60031)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | IL | |
| Diagnostic Radiology, Interventional Radiology | IL | |
| P A T H O L O G Y | IL | |
| Interventional Cardiology, Cardiovascular Disease (Cardiology), Internal Medicine | IL | |
| G A S T R O E N T E R O L O G Y | IL | |
| Internal Medicine | IL | |
| Cardiac Electrophysiology, Cardiovascular Disease (Cardiology), Internal Medicine | MN | |
| - | IL | |
| A N E S T H E S I O L O G Y | MI | |
| Nurse Practitioner | IL |
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