Mark Leonard Herring, M.D.
NPI 1386766368ActiveIndividual· Internal Medicine· Manitowoc, WI
Internal Medicine (M.D.) with Froedtert Manitowoc Medical Group, LLC, practicing in Manitowoc, Wisconsin. Their prescriptions cost Medicare Part D more than their services did: $207,928 for 3,925 claims, against $63,399 paid for services in 2024. Lists Holy Family Memorial as a hospital affiliation.
Overview
| NPI | 1386766368 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Apr 3, 2007 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 24825 | WI |
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 (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 208 |
|---|---|
| Services billed | 906 across 25 procedure codes |
| Paid by Medicare | $63,399 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,925 · 7,522 30-day fills |
|---|---|
| Patients | 205 |
| Total drug cost | $207,928 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 1981 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Froedtert Manitowoc Medical Group, LLCSheboygan, WI · 156 clinicians
Hospital affiliation
- Holy Family MemorialManitowoc, WI
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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