Sylvia Tan, M.D.
NPI 1700809720ActiveIndividual· Internal Medicine· Guymon, OK
Internal Medicine (M.D.) with Specialty Clinics of St Anne PLLC, practicing in Guymon, Oklahoma. Their prescriptions cost Medicare Part D more than their services did: $306,001 for 4,494 claims, against $153,473 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 7 companies reporting payments in 2025, $430.40 in all, mostly food and beverage. Lists Bsa Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1700809720 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 25, 2006 |
| Last updated in NPPES | Aug 20, 2024 |
| Certified by provider | Aug 20, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 19772 | OK |
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 - Internal Medicine (OK) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 323 |
|---|---|
| Services billed | 4,546 across 46 procedure codes |
| Paid by Medicare | $153,473 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,494 · 7,245 30-day fills |
|---|---|
| Patients | 373 |
| Total drug cost | $306,001 |
| Generic share | 86% of claims |
Education and affiliations
| Graduation year | 1989 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Pulmonary Disease |
Medical group
- Specialty Clinics of St Anne PLLCGuymon, OK · 2 clinicians
Hospital affiliations
- Bsa HospitalAmarillo, TX
- Memorial Hospital of Texas County AuthorityGuymon, OK
- Southwest Medical CenterLiberal, KS
Other facilities
- Health Watch Health Care of Guymon, LLCHome health agency · Guymon, OK
Industry payments (Open Payments)
- 2025$430.40 · 25 payments from 7 companies
- 2024$534.58 · 41 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $238.54 | 19 |
| Sanofi-Aventis U.S. LLC | $99.95 | 1 |
| Abbvie Inc. | $23.24 | 1 |
| Exact Sciences Corporation | $19.50 | 1 |
| Viatris Specialty LLC | $17.41 | 1 |
What the 2025 payments were for
- Food and Beverage$330.45 · 24 payments
- Education$99.95 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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