Gregory Paul Zydiak, M.D.
NPI 1740317155ActiveIndividual· Internal Medicine· Webster Groves, MO
Internal Medicine (M.D.) in Webster Groves, Missouri, licensed in MO, with an NPI issued in February 2007. Their prescriptions cost Medicare Part D more than their services did: $91,079 for 1,364 claims, against $24,655 paid for services in 2024.
Overview
| NPI | 1740317155 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Feb 27, 2007 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | R6E13 | MO |
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 - Internal Medicine (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 53 |
|---|---|
| Services billed | 441 across 4 procedure codes |
| Paid by Medicare | $24,655 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,364 · 1,388 30-day fills |
|---|---|
| Patients | 74 |
| Total drug cost | $91,079 |
| Generic share | 87% of claims |
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine providers in Webster Groves
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