Simon S. Tan, MD
NPI 1811001365ActiveIndividual· Psychiatry & Neurology, Neurology· Southlake, TX
Psychiatry & Neurology, Neurology (MD) with Oversite Neuro and 2 other groups, practicing in Southlake, Texas. Their prescriptions cost Medicare Part D more than their services did: $1,298,161 for 1,073 claims, against $315,251 paid for services in 2024. Vanda Pharmaceuticals Inc. was the largest of 27 companies reporting payments in 2025, $2,557 in all, mostly food and beverage. Lists Baylor Scott and White Medical Center McKinney and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1811001365 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 19, 2006 |
| Last updated in NPPES | Oct 17, 2025 |
| Certified by provider | Oct 17, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Neurology Primary | 2084N0400X | L2023 | TX |
| Psychiatry & Neurology, Neuromuscular Medicine | 2084N0008X | L2023 | TX |
| Psychiatry & Neurology, Clinical Neurophysiology | 2084N0600X | L2023 | 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 - Neurology (MD); Practitioner - Neurology (OR); Practitioner - Neurology (PA); Practitioner - Neurology (SC); Practitioner - Neurology (TX); Practitioner - Neurology (VA); Practitioner - Neurology (WA); Practitioner - Neurology (WV) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,015 |
|---|---|
| Services billed | 9,589 across 38 procedure codes |
| Paid by Medicare | $315,251 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,073 · 1,860 30-day fills |
|---|---|
| Patients | 128 |
| Total drug cost | $1,298,161 |
| Generic share | 80% of claims |
Education and affiliations
| Graduation year | 1987 |
|---|---|
| Medicare specialty | Neurology |
| Telehealth | Offers telehealth |
Medical groups
- Oversite NeuroLindale, TX · 7 clinicians
- Surgical Neuromonitoring,pllcWheeling, WV · 6 clinicians
- Txiom LLCArlington, TX · 3 clinicians
Hospital affiliations
- Baylor Scott and White Medical Center McKinneyMc Kinney, TX
- Baylor Scott and White Surgical Hospital FortworthFort Worth, TX
- Mercy Medical Center IncBaltimore, MD
- Tidalhealth Peninsula Regional, IncSalisbury, MD
- University of MD St Joseph Medical CenterTowson, MD
Industry payments (Open Payments)
- 2025$2,557 · 114 payments from 27 companies
- 2024$2,039 · 129 payments from 26 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Vanda Pharmaceuticals Inc. | $472.36 | 16 |
| Eisai Inc. | $242.34 | 9 |
| Sk Life Science, Inc. | $202.52 | 7 |
| Lundbeck LLC | $191.64 | 14 |
| Genentech USA, Inc. | $185.96 | 11 |
What the 2025 payments were for
- Food and Beverage$2,557 · 114 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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