Jon J. Ernstoff, M.D.
NPI 1598789653ActiveIndividual· Internal Medicine, Gastroenterology· Meriden, CT
Internal Medicine, Gastroenterology (M.D.) with Baystate Medical Practices Inc, practicing in Meriden, Connecticut. Their prescriptions cost Medicare Part D more than their services did: $36,789 for 139 claims, against $3,774 paid for services in 2024. Lists Baystate Franklin Medical Center as a hospital affiliation.
Overview
| NPI | 1598789653 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 26, 2006 |
| Last updated in NPPES | Apr 3, 2025 |
| Certified by provider | Apr 3, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 025772 | CT |
| Internal Medicine, Gastroenterology | 207RG0100X | 1022596 | MA |
| Internal Medicine | 207R00000X | 025772 | CT |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (CT); Practitioner - Gastroenterology (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 32 |
|---|---|
| Services billed | 48 across 11 procedure codes |
| Paid by Medicare | $3,774 |
Part D prescriptions in 2024
| Prescriptions (claims) | 139 · 334 30-day fills |
|---|---|
| Patients | 86 |
| Total drug cost | $36,789 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 1978 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical group
- Baystate Medical Practices IncSpringfield, MA · 1,369 clinicians
Hospital affiliation
- Baystate Franklin Medical CenterGreenfield, MA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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