Filemon Tan, M.D.
NPI 1083632319 · Rheumatology Physician · Houston, TX
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Filemon Tan, M.D. is a Rheumatology Physician provider in Houston, TX (NPI 1083632319).
Provider details
- NPI number
- 1083632319
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- J0874 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,066 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 384 | $14 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 136 | $128 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 131 | $62 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 112 | $127 |
| Administration of Chemotherapy Into Vein, Each Additional Hour96415 | 70 | $28 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'S |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 36 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 157 | 51 |
| Methotrexate Sodiumbrand: Methotrexate | 109 | 31 |
| Hydroxychloroquine Sulfate | 106 | 34 |
| Gabapentin | 62 | 21 |
| Allopurinol | 54 | 15 |
| Meloxicam | 39 | 15 |
| Leflunomide | 36 | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$20 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-17
- Last updated
- 2024-01-10
- Certified
- 2024-01-10
Frequently asked questions
- What is Filemon Tan's NPI number?
- Filemon Tan's National Provider Identifier (NPI) is 1083632319, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Filemon Tan's specialty?
- Filemon Tan is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Filemon Tan located?
- Filemon Tan's practice location on file with NPPES is 6410 Fannin St, Houston, TX 77030-3000.
- What is Filemon Tan's phone number?
- The practice phone number listed in the NPPES registry for Filemon Tan is (832) 325-7191.
- Does Filemon Tan accept Medicare?
- Filemon Tan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Filemon Tan's NPI active?
- Yes — Filemon Tan's NPI (1083632319) is active in the NPPES registry as of the last update on 2024-01-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.