Filemon K. Tan, M.D.
NPI 1083632319ActiveIndividual· Internal Medicine, Rheumatology· Houston, TX
Internal Medicine, Rheumatology (M.D.) in Houston, Texas, trained at University of Texas Medical School at Houston (class of 1990). Their prescriptions cost Medicare Part D more than their services did: $1,885,066 for 1,334 claims, against $1,196,452 paid for services in 2024. Abbvie Inc. was the largest of 2 companies reporting payments in 2025, $234.33 in all, mostly food and beverage.
Overview
| NPI | 1083632319 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 17, 2006 |
| Last updated in NPPES | Jan 10, 2024 |
| Certified by provider | Jan 10, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Rheumatology Primary | 207RR0500X | J0874 | TX |
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 - Rheumatology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 363 |
|---|---|
| Services billed | 121,250 across 54 procedure codes |
| Paid by Medicare | $1,196,452 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,334 · 2,830 30-day fills |
|---|---|
| Patients | 205 |
| Total drug cost | $1,885,066 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | University of Texas Medical School at Houston |
|---|---|
| Graduation year | 1990 |
| Medicare specialty | Rheumatology |
| Telehealth | Offers telehealth |
Medical group
- Ut PhysiciansHouston, TX · 1,765 clinicians
Hospital affiliations
- Memorial Hermann - Texas Medical CenterHouston, TX
- Memorial Hermann Hospital SystemHouston, TX
- Memorial Hermann Katy HospitalKaty, TX
- Memorial Hermann Memorial City HospitalHouston, TX
- Memorial Hermann Sugar Land HospitalSugar Land, TX
Industry payments (Open Payments)
- 2025$234.33 · 16 payments from 2 companies
- 2024$19.54 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $139.34 | 15 |
| Janssen Biotech, Inc. | $94.99 | 1 |
What the 2025 payments were for
- Food and Beverage$139.34 · 15 payments
- Education$94.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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