John C. Elser, M.D.
NPI 1154366839ActiveIndividual· Family Medicine· Evergreen Park, IL
Family Medicine (M.D.) with Osf Multi-Specialty Group, practicing in Evergreen Park, Illinois. Their prescriptions cost Medicare Part D more than their services did: $800,488 for 6,936 claims, against $101,869 paid for services in 2024. Amgen Inc. reported $14.02 in payments in 2025, mostly food and beverage. Lists Advocate Christ Hospital & Medical Center and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1154366839 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 18, 2006 |
| Last updated in NPPES | Jun 23, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 036080970 | IL |
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 - Family Practice (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 347 |
|---|---|
| Services billed | 2,541 across 56 procedure codes |
| Paid by Medicare | $101,869 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,936 · 17,265 30-day fills |
|---|---|
| Patients | 516 |
| Total drug cost | $800,488 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 1991 |
|---|---|
| Medicare specialty | Family Practice |
Medical group
- Osf Multi-Specialty GroupMorton, IL · 2,114 clinicians
Hospital affiliations
- Advocate Christ Hospital & Medical CenterOak Lawn, IL
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Osf Little Company of Mary Medical CenterEvergreen Park, IL
- Palos Community HospitalPalos Heights, IL
- Silver Cross Hospital and Medical CentersNew Lenox, IL
Other facilities
- Advocate Home Health Care ServHome health agency · Oakbrook, IL
- Osf Home HealthHome health agency · Oak Lawn, IL
- Providence at HomeHome health agency · Tinley Park, IL
Industry payments (Open Payments)
- 2025$14.02 · 1 payment from 1 company
- 2024$73.03 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $14.02 | 1 |
What the 2025 payments were for
- Food and Beverage$14.02 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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