David Zenk, DO
NPI 1194164509ActiveIndividual· Internal Medicine· Des Peres, MO
Internal Medicine (DO) in Des Peres, Missouri, trained at At Still University of Health Sciences, College of Osteo Med, Kirksville (class of 2013). Their prescriptions cost Medicare Part D more than their services did: $548,947 for 6,325 claims, against $85,875 paid for services in 2024. Abbvie Inc. was the largest of 3 companies reporting payments in 2025, $69.90 in all, mostly food and beverage.
Overview
| NPI | 1194164509 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | Yes |
| NPI issued | Jun 19, 2013 |
| Last updated in NPPES | Sep 13, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 2013018898 | MO |
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 (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 229 |
|---|---|
| Services billed | 1,129 across 34 procedure codes |
| Paid by Medicare | $85,875 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,325 · 15,155 30-day fills |
|---|---|
| Patients | 551 |
| Total drug cost | $548,947 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | At Still University of Health Sciences, College of Osteo Med, Kirksville |
|---|---|
| Graduation year | 2013 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Hospitalist |
| Telehealth | Offers telehealth |
Medical group
- Mercy Clinic East CommunitiesSaint Louis, MO · 571 clinicians
Hospital affiliations
- Barnes-Jewish West County HospitalCreve Coeur, MO
- Mercy Hospital JeffersonCrystal City, MO
- Mercy Hospital SouthSaint Louis, MO
- Mercy Hospital St LouisSaint Louis, MO
Other facilities
- Mercy Home HealthHome health agency · Saint Louis, MO
- Mercy HospiceHospice · Saint Louis, MO
- Ssm Health Rehabilitation HospitalInpatient rehabilitation facility · Richmond Heights, MO
Industry payments (Open Payments)
- 2025$69.90 · 3 payments from 3 companies
- 2024$32.96 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $28.16 | 1 |
| Abbott Laboratories | $22.91 | 1 |
| Glaxosmithkline, LLC. | $18.83 | 1 |
What the 2025 payments were for
- Food and Beverage$69.90 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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