William G. Imlach, D.O.
NPI 1699850610ActiveIndividual· Family Medicine· Olympia Fields, IL
Family Medicine (D.O.) in Olympia Fields, Illinois, trained at Midwestern University, Chicago College of Osteopathic Med (class of 1993). Their prescriptions cost Medicare Part D more than their services did: $2,956,101 for 23,965 claims, against $162,064 paid for services in 2024. Abbvie Inc. was the largest of 20 companies reporting payments in 2025, $1,315 in all, mostly food and beverage.
Overview
| NPI | 1699850610 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Oct 26, 2006 |
| Last updated in NPPES | Mar 5, 2025 |
| Certified by provider | Mar 5, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 036091396 | 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 | 397 |
|---|---|
| Services billed | 26,534 across 64 procedure codes |
| Paid by Medicare | $162,064 |
Part D prescriptions in 2024
| Prescriptions (claims) | 23,965 · 52,762 30-day fills |
|---|---|
| Patients | 1,133 |
| Total drug cost | $2,956,101 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | Midwestern University, Chicago College of Osteopathic Med |
|---|---|
| Graduation year | 1993 |
| Medicare specialty | Family Practice |
| Telehealth | Offers telehealth |
Medical group
- Advocate Health and Hospitals CorporationChicago, IL · 3,118 clinicians
Hospital affiliations
- Advocate Christ Hospital & Medical CenterOak Lawn, IL
- Advocate Trinity HospitalChicago, IL
- Franciscan Health Olympia & Chicago HeightsOlympia Fields, IL
- Ingalls Memorial HospitalHarvey, IL
Other facilities
- Accentcare Home Health of IllinoisHome health agency · Lombard, IL
- Advocate Home Health Care ServHome health agency · Oakbrook, IL
- Prime Home Care - Olympia FieldsHome health agency · Olympia Fields, IL
Industry payments (Open Payments)
- 2025$1,315 · 72 payments from 20 companies
- 2024$975.24 · 59 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $268.28 | 15 |
| Novo Nordisk Inc | $220.42 | 13 |
| Lilly USA, LLC | $211.88 | 16 |
| Dexcom, Inc. | $72.00 | 2 |
| Viiv Healthcare Company | $70.17 | 3 |
What the 2025 payments were for
- Food and Beverage$1,270 · 71 payments
- Education$45.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 29 family medicine physicians in Olympia Fields · All family medicine physicians in Illinois