Jambunathan Mahadevan, MD
NPI 1669588638ActiveIndividual· Internal Medicine· St Louis, MO
Internal Medicine (MD) in St Louis, Missouri, licensed in MO, with an NPI issued in August 2006. Their prescriptions cost Medicare Part D more than their services did: $992,150 for 7,892 claims, against $32,248 paid for services in 2024. Novo Nordisk Inc was the largest of 5 companies reporting payments in 2025, $324.58 in all, mostly food and beverage. Lists Mercy Hospital South and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1669588638 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 22, 2006 |
| Last updated in NPPES | Aug 5, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | R7375 | 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 | 70 |
|---|---|
| Services billed | 1,021 across 7 procedure codes |
| Paid by Medicare | $32,248 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,892 · 14,361 30-day fills |
|---|---|
| Patients | 243 |
| Total drug cost | $992,150 |
| Generic share | 79% of claims |
Education and affiliations
| Graduation year | 1971 |
|---|---|
| Medicare specialty | Internal Medicine |
Hospital affiliations
- Mercy Hospital SouthSaint Louis, MO
- Mercy Hospital St LouisSaint Louis, MO
- Ssm Health St Mary's Hospital - St LouisSaint Louis, MO
Industry payments (Open Payments)
- 2025$324.58 · 13 payments from 5 companies
- 2024$623.90 · 31 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $156.44 | 6 |
| Lilly USA, LLC | $96.05 | 4 |
| Takeda Pharmaceuticals U.S.A., Inc. | $29.72 | 1 |
| Glaxosmithkline, LLC. | $22.91 | 1 |
| Astrazeneca Pharmaceuticals LP | $19.46 | 1 |
What the 2025 payments were for
- Food and Beverage$324.58 · 13 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 71 internal medicine physicians in St Louis · All internal medicine physicians in Missouri