Marcus Adam Tielker, M.D.
NPI 1124263215ActiveIndividual· Internal Medicine, Pulmonary Disease· Indianapolis, IN
Internal Medicine, Pulmonary Disease (M.D.) in Indianapolis, Indiana, trained at Indiana University School of Medicine (class of 2004). Their prescriptions cost Medicare Part D more than their services did: $806,041 for 1,130 claims, against $90,514 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 22 companies reporting payments in 2025, $2,598 in all, mostly food and beverage.
Overview
| NPI | 1124263215 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Dec 4, 2008 |
| Last updated in NPPES | Dec 5, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | 01064146A | IN |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Pulmonary Disease (IN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 432 |
|---|---|
| Services billed | 1,296 across 33 procedure codes |
| Paid by Medicare | $90,514 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,130 · 1,713 30-day fills |
|---|---|
| Patients | 227 |
| Total drug cost | $806,041 |
| Generic share | 24% of claims |
Education and affiliations
| Medical school | Indiana University School of Medicine |
|---|---|
| Graduation year | 2004 |
| Medicare specialty | Pulmonary Disease |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Community Physicians of Indiana IncIndianapolis, IN · 1,565 clinicians
Hospital affiliations
- Community Hospital EastIndianapolis, IN
- Community Hospital NorthIndianapolis, IN
Industry payments (Open Payments)
- 2025$2,598 · 130 payments from 22 companies
- 2024$2,407 · 125 payments from 22 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $401.43 | 22 |
| Glaxosmithkline, LLC. | $357.03 | 20 |
| Genzyme Corporation | $228.35 | 9 |
| Regeneron Healthcare Solutions, Inc. | $199.31 | 9 |
| Takeda Pharmaceuticals U.S.A., Inc. | $176.46 | 8 |
What the 2025 payments were for
- Food and Beverage$2,595 · 129 payments
- Education$2.82 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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