Mark C. Gunby, DO
NPI 1699886309ActiveIndividual· Internal Medicine, Geriatric Medicine· Saint Louis, MO
Internal Medicine, Geriatric Medicine (DO) in Saint Louis, Missouri, licensed in MO, with an NPI issued in August 2006. Their prescriptions cost Medicare Part D more than their services did: $1,121,507 for 14,202 claims, against $54,118 paid for services in 2024. Novo Nordisk Inc was the largest of 3 companies reporting payments in 2024, $61.03 in all, mostly food and beverage.
Overview
| NPI | 1699886309 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Aug 31, 2006 |
| Last updated in NPPES | Feb 19, 2021 |
| Certified by provider | Feb 19, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Geriatric Medicine Primary | 207RG0300X | 100326 | MO |
| Internal Medicine | 207R00000X | 100326 | 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) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 315 |
|---|---|
| Services billed | 712 across 30 procedure codes |
| Paid by Medicare | $54,118 |
Part D prescriptions in 2024
| Prescriptions (claims) | 14,202 · 31,369 30-day fills |
|---|---|
| Patients | 1,031 |
| Total drug cost | $1,121,507 |
| Generic share | 88% of claims |
Industry payments (Open Payments)
- 2024$61.03 · 4 payments from 3 companies
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $31.00 | 2 |
| Pfizer Inc. | $15.23 | 1 |
| Glaxosmithkline, LLC. | $14.80 | 1 |
What the 2024 payments were for
- Food and Beverage$61.03 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 55 geriatricians in Saint Louis · All geriatricians in Missouri