Tiffany Biason Dy, MD
NPI 1528292174ActiveIndividual· Internal Medicine, Allergy & Immunology· Saint Louis, MO
Internal Medicine, Allergy & Immunology (MD) with Washington University, practicing in Saint Louis, Missouri. Their prescriptions cost Medicare Part D more than their services did: $3,788,973 for 1,731 claims, against $123,086 paid for services in 2024. Pfizer Inc. was the largest of 3 companies reporting payments in 2025, $86.82 in all, mostly food and beverage. Lists Barnes Jewish Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1528292174 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 12, 2009 |
| Last updated in NPPES | Apr 17, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Allergy & Immunology Primary | 207RA0201X | 2014003240 | MO |
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 - Allergy/Immunology (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 229 |
|---|---|
| Services billed | 6,823 across 43 procedure codes |
| Paid by Medicare | $123,086 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,731 · 2,423 30-day fills |
|---|---|
| Patients | 210 |
| Total drug cost | $3,788,973 |
| Generic share | 55% of claims |
Education and affiliations
| Graduation year | 2009 |
|---|---|
| Medicare specialty | Allergy/Immunology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Washington UniversitySaint Louis, MO · 3,029 clinicians
Hospital affiliations
- Barnes Jewish HospitalSaint Louis, MO
- Barnes-Jewish West County HospitalCreve Coeur, MO
- Christian Hospital NortheastSaint Louis, MO
Industry payments (Open Payments)
- 2025$86.82 · 5 payments from 3 companies
- 2024$145.31 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $51.36 | 3 |
| Astrazeneca Pharmaceuticals LP | $20.43 | 1 |
| Glaxosmithkline, LLC. | $15.03 | 1 |
What the 2025 payments were for
- Food and Beverage$86.82 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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