Karl Joseph Zeren, D.D.S.
NPI 1265579379ActiveIndividual· Dentist, Periodontics· Timonium, MD
Opted out of Medicare from January 2013 to January 2027. Dentist, Periodontics (D.D.S.) in Timonium, Maryland, licensed in MD, with an NPI issued in January 2007. Part D covered 203 prescriptions written in 2024, 90% of them generic. Zimvie Inc. reported $59.95 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1265579379 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.D.S. |
| Sole proprietor | Yes |
| NPI issued | Jan 30, 2007 |
| Last updated in NPPES | Apr 14, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dentist, Periodontics Primary | 1223P0300X | 5937 | MD |
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) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Opt-out | Opted out Jan 1, 2013 – Jan 1, 2027 |
| Can order and refer | Yes |
During an opt-out period the provider sees Medicare patients only under private contracts, and Medicare does not pay claims for their services.
Part D prescriptions in 2024
| Prescriptions (claims) | 203 · 209 30-day fills |
|---|---|
| Patients | 70 |
| Total drug cost | $1,015 |
| Generic share | 90% of claims |
Industry payments (Open Payments)
- 2025$59.95 · 1 payment from 1 company
- 2024$266.29 · 6 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Zimvie Inc. | $59.95 | 1 |
What the 2025 payments were for
- Food and Beverage$59.95 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other periodontists in Timonium
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