Cassie Naomi Chan, MD
NPI 1407345499ActiveIndividual· Psychiatry & Neurology, Neuromuscular Medicine· San Antonio, TX
Psychiatry & Neurology, Neuromuscular Medicine (MD) in San Antonio, Texas, trained at University of Texas Medical School at San Antonio (class of 2018). Their prescriptions cost Medicare Part D more than their services did: $3,127,229 for 752 claims, against $49,110 paid for services in 2024. Alexion Pharmaceuticals, Inc. was the largest of 7 companies reporting payments in 2025, $1,716 in all, mostly speaking and faculty fees.
Overview
| NPI | 1407345499 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 4, 2018 |
| Last updated in NPPES | Nov 13, 2023 |
| Certified by provider | Nov 13, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Neuromuscular Medicine Primary | 2084N0008X | U3815 | TX |
| Psychiatry & Neurology, Neurology | 2084N0400X | U3815 | 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 (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 167 |
|---|---|
| Services billed | 2,118 across 33 procedure codes |
| Paid by Medicare | $49,110 |
Part D prescriptions in 2024
| Prescriptions (claims) | 752 · 1,030 30-day fills |
|---|---|
| Patients | 127 |
| Total drug cost | $3,127,229 |
| Generic share | 76% of claims |
Education and affiliations
| Medical school | University of Texas Medical School at San Antonio |
|---|---|
| Graduation year | 2018 |
| Medicare specialty | Neurology |
| Telehealth | Offers telehealth |
Medical group
- University of Texas Health Science Center at San AntonioSan Antonio, TX · 1,297 clinicians
Hospital affiliations
- Baptist Medical CenterSan Antonio, TX
- University Health SystemSan Antonio, TX
- Ut Health San Antonio Multispecialty & Research HoSan Antonio, TX
Industry payments (Open Payments)
- 2025$1,716 · 16 payments from 7 companies
- 2024$396.85 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alexion Pharmaceuticals, Inc. | $909.36 | 2 |
| Sarepta Therapeutics, Inc. | $304.13 | 7 |
| Ucb, Inc. | $234.90 | 2 |
| Tanabe Pharma America, Inc. | $103.45 | 2 |
| Janssen Biotech, Inc. | $99.00 | 1 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$787.50 · 1 payment
- Food and Beverage$524.69 · 11 payments
- Education$202.45 · 3 payments
- Travel and Lodging$201.27 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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