Thomas Gniadek, M.D.
NPI 1972591931 · Internal Medicine Physician · Waterbury, CT
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Gniadek, M.D. is a Internal Medicine Physician provider in Waterbury, CT (NPI 1972591931).
Provider details
- NPI number
- 1972591931
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 19477 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
868 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 579 | $133 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 146 | $95 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 107 | $35 |
| Administration of Influenza Virus VaccineG0008 | 22 | $34 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 14 | $15 |
Typical Medicare-allowed amounts for these services range $15–$133 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 140 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 905 | 236 |
| Rosuvastatin Calcium | 434 | 108 |
| Tirzepatidebrand: Mounjaro | 394 | 60 |
| Lisinopril | 304 | 80 |
| Metoprolol Succinate | 245 | 60 |
| Amlodipine Besylate | 237 | 70 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$799 across 42 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-10-12
- Last updated
- 2021-11-09
- Certified
- 2021-11-09
Frequently asked questions
- What is Thomas Gniadek's NPI number?
- Thomas Gniadek's National Provider Identifier (NPI) is 1972591931, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Gniadek's specialty?
- Thomas Gniadek is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Gniadek located?
- Thomas Gniadek's practice location on file with NPPES is 1389 W Main St, Waterbury, CT 06708.
- What is Thomas Gniadek's phone number?
- The practice phone number listed in the NPPES registry for Thomas Gniadek is (203) 755-7711.
- Does Thomas Gniadek accept Medicare?
- Thomas Gniadek is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Gniadek's NPI active?
- Yes — Thomas Gniadek's NPI (1972591931) is active in the NPPES registry as of the last update on 2021-11-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.