Mark Daryl Tieman, M.D.
NPI 1154494003ActiveIndividual· Internal Medicine· Commack, NY
Internal Medicine (M.D.) in Commack, New York, trained at Albert Einstein College of Medicine of Yeshiva University (class of 1986). In 2024 Medicare paid $67,430 for 61 patients, and Part D covered 365 of their prescriptions, 84% of them generic.
Overview
| NPI | 1154494003 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Nov 16, 2006 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 179172 | NY |
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 - Internal Medicine (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 61 |
|---|---|
| Services billed | 1,051 across 21 procedure codes |
| Paid by Medicare | $67,430 |
Part D prescriptions in 2024
| Prescriptions (claims) | 365 · 553 30-day fills |
|---|---|
| Patients | 39 |
| Total drug cost | $42,294 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | Albert Einstein College of Medicine of Yeshiva University |
|---|---|
| Graduation year | 1986 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
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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All 30 internal medicine physicians in Commack · All internal medicine physicians in New York