Tiffany Uichanco Purewal, MD
NPI 1548722515ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· San Antonio, TX
Internal Medicine, Endocrinology, Diabetes & Metabolism (MD) with Diabetes and Glandular Disease Clinic PA, practicing in San Antonio, Texas. Their prescriptions cost Medicare Part D more than their services did: $49,834 for 147 claims, against $17,143 paid for services in 2024. Alexion Pharmaceuticals, Inc. was the largest of 32 companies reporting payments in 2025, $6,887 in all, mostly food and beverage.
Overview
| NPI | 1548722515 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 1, 2019 |
| Last updated in NPPES | Oct 29, 2026 |
| Certified by provider | Oct 29, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | U8117 | TX |
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 - Internal Medicine (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 60 |
|---|---|
| Services billed | 642 across 46 procedure codes |
| Paid by Medicare | $17,143 |
Part D prescriptions in 2024
| Prescriptions (claims) | 147 · 283 30-day fills |
|---|---|
| Patients | 47 |
| Total drug cost | $49,834 |
| Generic share | 34% of claims |
Education and affiliations
| Graduation year | 2019 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Diabetes and Glandular Disease Clinic PASan Antonio, TX · 9 clinicians
Industry payments (Open Payments)
- 2025$6,887 · 274 payments from 32 companies
- 2024$2,064 · 84 payments from 20 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alexion Pharmaceuticals, Inc. | $931.98 | 5 |
| Medtronic, Inc. | $825.37 | 20 |
| Novo Nordisk Inc | $479.46 | 20 |
| Sequel Med Tech, LLC | $425.49 | 38 |
| Lilly USA, LLC | $409.62 | 22 |
What the 2025 payments were for
- Food and Beverage$5,974 · 272 payments
- Consulting Fee$870.00 · 1 payment
- Education$42.50 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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