Tiffany Eileen Groen, D.O.
NPI 1609019538ActiveIndividual· Family Medicine· New Lenox, IL
Family Medicine (D.O.) with Health Service Systems, Inc, practicing in New Lenox, Illinois. Their prescriptions cost Medicare Part D more than their services did: $664,370 for 5,777 claims, against $189,236 paid for services in 2024. Novo Nordisk Inc was the largest of 15 companies reporting payments in 2025, $1,188 in all, mostly food and beverage. Lists Advocate Christ Hospital & Medical Center and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1609019538 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Apr 8, 2009 |
| Last updated in NPPES | Feb 12, 2020 |
| Certified by provider | Feb 12, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 036133259 | 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 | 506 |
|---|---|
| Services billed | 3,129 across 67 procedure codes |
| Paid by Medicare | $189,236 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,777 · 14,191 30-day fills |
|---|---|
| Patients | 526 |
| Total drug cost | $664,370 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 2009 |
|---|---|
| Medicare specialty | Family Practice |
| Secondary specialties | Preventive Medicine |
Medical group
- Health Service Systems, IncNew Lenox, IL · 68 clinicians
Hospital affiliations
- Advocate Christ Hospital & Medical CenterOak Lawn, IL
- Advocate Trinity HospitalChicago, IL
- Ingalls Memorial HospitalHarvey, IL
- Palos Community HospitalPalos Heights, IL
- Silver Cross Hospital and Medical CentersNew Lenox, IL
Other facilities
- Silver Cross Home HealthHome health agency · New Lenox, IL
Industry payments (Open Payments)
- 2025$1,188 · 52 payments from 15 companies
- 2024$832.95 · 45 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $242.60 | 11 |
| Phathom Pharmaceuticals, Inc. | $223.01 | 8 |
| Axsome Therapeutics, Inc. | $126.57 | 6 |
| Astellas Pharma US Inc | $122.71 | 5 |
| Pfizer Inc. | $92.22 | 4 |
What the 2025 payments were for
- Food and Beverage$1,188 · 52 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 23 family medicine physicians in New Lenox · All family medicine physicians in Illinois