Tania Messmer, P.A.-C
NPI 1528000114ActiveIndividual· Physician Assistant, Medical· Oakbrook Terrace, IL
Physician Assistant, Medical (P.A.-C) with Gi Partners of Illinois PLLC, practicing in Oakbrook Terrace, Illinois. Part D covered 17 prescriptions written in 2024, 76% of them generic. Abbvie Inc. was the largest of 13 companies reporting payments in 2025, $886.96 in all, mostly food and beverage. Lists Advocate Christ Hospital & Medical Center as a hospital affiliation.
Overview
| NPI | 1528000114 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | P.A.-C |
| Sole proprietor | No |
| NPI issued | Jun 11, 2006 |
| Last updated in NPPES | Oct 12, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant, Medical Primary | 363AM0700X | 085002586 | 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 - Physician Assistant (IL) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 17 · 31 30-day fills |
|---|---|
| Patients | 13 |
| Total drug cost | $2,695 |
| Generic share | 76% of claims |
Education and affiliations
| Graduation year | 2005 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Gi Partners of Illinois PLLCLibertyville, IL · 39 clinicians
Hospital affiliation
- Advocate Christ Hospital & Medical CenterOak Lawn, IL
Industry payments (Open Payments)
- 2025$886.96 · 44 payments from 13 companies
- 2024$498.98 · 24 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $173.05 | 13 |
| Takeda Pharmaceuticals U.S.A., Inc. | $161.07 | 8 |
| Janssen Biotech, Inc. | $142.45 | 5 |
| Genzyme Corporation | $78.26 | 3 |
| Aimmune Therapeutics, Inc. | $60.14 | 3 |
What the 2025 payments were for
- Food and Beverage$835.97 · 43 payments
- Education$50.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records