THOMAS L. CAO (MD) – Hematology & Oncology Physician, NPI 1194797266
Hematology & Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
8,828 INTERNAL MEDICINE in IL
Loading map...
Provider Addresses for THOMAS L. CAO (MD)
North Randall Road, Elgin, Dundee Township, Kane County, Illinois, 60123, United States
SUITE 402
ELGIN, IL 60123
Phone: (847) 717-6860
Fax: (847) 717-6872
Type: Location
1600, Randall Road, Elgin, Kane County, Illinois, 60123, United States
STE 135
ELGIN, IL 601237810
Phone: (847) 717-6860
Fax: (847) 717-6872
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
CMS reports 63 Open Payments records for all available years, with a total value of $1,467.
Total Amount is formed as General ($1,467) + Research ($0) + Ownership ($0) = $1,467.
Last reported payment date: 2024-11-21 • Largest payer in this snapshot: PFIZER INC. ($454).
Total Amount
$1,467
General + Research + Ownership
Payments
63
Total payment records
General Amount
$1,467
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-21
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| PFIZER INC. | $454 |
| Lilly USA, LLC | $213 |
| E.R. Squibb & Sons, L.L.C. | $163 |
| AstraZeneca Pharmaceuticals LP | $144 |
| Janssen Biotech, Inc. | $96 |
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: 2004-06-29
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 |
|---|---|---|---|---|
| I20040629000035 | I | Internal Medicine | 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 |
|---|---|---|---|---|
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 380 | 91 | $0 |
| 36410 | Insertion of needle into vein (3 years or older) | 208 | 58 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 178 | 78 | $0 |
| 99212 | Established patient office or other outpatient visit, 10-19 minutes | 74 | 39 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 11 | 11 | $0 |
Insurance plans in this area (ZIP 60123)
Loading plans...
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.