DR. THOMAS C GNIADEK (M.D.) – Internal Medicine Physician, NPI 1972591931
Internal Medicine Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
222 ENDOCRINOLOGY in CT
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Provider Addresses for DR. THOMAS C GNIADEK (M.D.)
1389, West Main Street, West Side Hill, Waterbury, New Haven County, Connecticut, 06708, United States
SUITE 224
WATERBURY, CT 06708
Phone: (203) 755-7711
Fax: (203) 755-8996
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 58 Open Payments records for all available years, with a total value of $1,192.
Total Amount is formed as General ($1,192) + Research ($0) + Ownership ($0) = $1,192.
Last reported payment date: 2024-12-18 • Largest payer in this snapshot: Abbott Laboratories ($361).
Total Amount
$1,192
General + Research + Ownership
Payments
58
Total payment records
General Amount
$1,192
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-18
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Abbott Laboratories | $361 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $305 |
| Xeris Pharmaceuticals, Inc. | $145 |
| Medtronic, Inc. | $75 |
| Lilly USA, LLC | $55 |
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: 2010-10-19
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 |
|---|---|---|---|---|
| I20101019000419 | I | Endocrinology | CT | 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 |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 646 | 287 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 177 | 130 | $0 |
| 95251 | Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report | 87 | 44 | $0 |
| G0008 | Administration of influenza virus vaccine | 61 | 61 | $0 |
| 96372 | Injection of drug or substance under skin or into muscle | 60 | 12 | $0 |
Insurance plans in this area (ZIP 06708)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| ENDOCRINOLOGY | CT | 81002 | Urinalysis, manual test | 15 | 13 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | GA | |
| Cardiovascular Disease (Cardiology) | CT | |
| - | CT | |
| Emergency Medicine | RI | |
| - | GA | |
| Physician Assistant | CT | |
| G A S T R O E N T E R O L O G Y | CT | |
| Cardiovascular Disease (Cardiology) | CT | |
| Physician Assistant | CT | |
| General Surgery, Surgical Oncology | CT |
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