EVANGELOS G. TAMBASSIS (M.D.) – Anesthesiology Physician, NPI 1679569198
Anesthesiology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
2,631 ANESTHESIOLOGY in IL
Provider Addresses for EVANGELOS G. TAMBASSIS (M.D.)
1 Saint Elizabeth Blvd
O Fallon, IL 622691099
Phone: (618) 234-2120
Type: Location
1005 Broadway St
Quincy, IL 623012834
Phone: (217) 223-8400
Type: Location
HSHS Saint Elizabeth's Hospital, 1, Saint Elizabeth's Boulevard, Glenview, O'Fallon, Saint Clair County, Illinois, 62269, United States
O FALLON, IL 622691099
Phone: (217) 234-2120
Type: Mailing
1445, Christy Drive, Jefferson City, Cole County, Missouri, 65101, United States
JEFFERSON CITY, MO 651012853
Phone: (573) 636-3483
Fax: (573) 636-5315
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 26 Open Payments records for all available years, with a total value of $897.
Total Amount is formed as General ($897) + Research ($0) + Ownership ($0) = $897.
Last reported payment date: 2024-12-13 • Largest payer in this snapshot: EAGLE PHARMACEUTICALS, INC. ($194).
Total Amount
$897
General + Research + Ownership
Payments
26
Total payment records
General Amount
$897
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-13
Latest reported date
Top Companies
Largest payers in this snapshot
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: 2007-05-14
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 |
|---|---|---|---|---|
| I20070514000081 | I | Anesthesiology | 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 |
|---|---|---|---|---|
| 00812 | Anesthesia for exam of colon using an endoscope | 41 | 41 | $0 |
| 00731 | Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope | 35 | 34 | $0 |
| 00910 | Anesthesia for other procedure on urinary system through urethra | 34 | 32 | $0 |
| 36620 | Insertion of artery tube for blood sampling or infusion through skin | 30 | 29 | $0 |
| 00914 | Anesthesia for removal of prostate including use of an endoscope | 24 | 24 | $0 |
Insurance plans in this area (ZIP 62269)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| ANESTHESIOLOGY | MO | 36620 | Insertion of arterial catheter for blood sampling or infusion, accessed through the skin | 12 | 12 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Anesthesiology Assistant | MO | |
| Certified Registered Nurse Anesthetist (Crna) | MO | |
| Anesthesiology Assistant | NC | |
| A N E S T H E S I O L O G Y | MO | |
| Certified Registered Nurse Anesthetist (Crna) | MO | |
| Certified Registered Nurse Anesthetist (Crna) | MO | |
| Certified Registered Nurse Anesthetist (Crna) | MO | |
| Certified Registered Nurse Anesthetist (Crna) | IL | |
| Anesthesiology, Critical Care (Intensivists) | MO | |
| Certified Registered Nurse Anesthetist (Crna) | IL |
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