Michael Steven Disiena, M.D.
NPI 1932593837ActiveIndividual· Internal Medicine, Gastroenterology· Torrington, CT
Internal Medicine, Gastroenterology (M.D.) with Connecticut Gi PLLC, practicing in Torrington, Connecticut. Their prescriptions cost Medicare Part D more than their services did: $332,617 for 653 claims, against $128,090 paid for services in 2024. Phathom Pharmaceuticals, Inc. was the largest of 7 companies reporting payments in 2025, $6,846 in all, mostly speaking and faculty fees. Lists Charlotte Hungerford Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1932593837 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 27, 2015 |
| Last updated in NPPES | Jul 8, 2021 |
| Certified by provider | Jul 8, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 68067 | CT |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 270 |
|---|---|
| Services billed | 7,746 across 45 procedure codes |
| Paid by Medicare | $128,090 |
Part D prescriptions in 2024
| Prescriptions (claims) | 653 · 1,268 30-day fills |
|---|---|
| Patients | 258 |
| Total drug cost | $332,617 |
| Generic share | 81% of claims |
Education and affiliations
| Graduation year | 2015 |
|---|---|
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Connecticut Gi PLLCWallingford, CT · 248 clinicians
Hospital affiliations
- Charlotte Hungerford HospitalTorrington, CT
- Sharon HospitalSharon, CT
Industry payments (Open Payments)
- 2025$6,846 · 15 payments from 7 companies
- 2024$26,400 · 38 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Phathom Pharmaceuticals, Inc. | $6,509 | 5 |
| Regeneron Healthcare Solutions, Inc. | $111.39 | 2 |
| Takeda Pharmaceuticals U.S.A., Inc. | $71.75 | 2 |
| Abbvie Inc. | $65.66 | 3 |
| Aimmune Therapeutics, Inc. | $54.63 | 1 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$5,000 · 2 payments
- Travel and Lodging$1,424 · 2 payments
- Food and Beverage$422.76 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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