Tammy T. Chen, M.D.
NPI 1013055706ActiveIndividual· Psychiatry & Neurology, Psychiatry· Rock Hill, SC
Psychiatry & Neurology, Psychiatry (M.D.) in Rock Hill, South Carolina, trained at Tulane University School of Medicine (class of 2001). Their prescriptions cost Medicare Part D more than their services did: $743,576 for 4,189 claims, against $42,435 paid for services in 2024. Abbvie Inc. was the largest of 4 companies reporting payments in 2025, $426.68 in all, mostly food and beverage.
Overview
| NPI | 1013055706 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Feb 2, 2007 |
| Last updated in NPPES | Jan 23, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Psychiatry Primary | 2084P0800X | 31361 | SC |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Psychiatry (SC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 83 |
|---|---|
| Services billed | 538 across 4 procedure codes |
| Paid by Medicare | $42,435 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,189 · 5,838 30-day fills |
|---|---|
| Patients | 193 |
| Total drug cost | $743,576 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | Tulane University School of Medicine |
|---|---|
| Graduation year | 2001 |
| Medicare specialty | Psychiatry |
Industry payments (Open Payments)
- 2025$426.68 · 35 payments from 4 companies
- 2024$940.87 · 51 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $230.15 | 24 |
| Neurocrine Biosciences, Inc. | $160.69 | 9 |
| Lundbeck LLC | $20.80 | 1 |
| Neos Therapeutics, LP | $15.04 | 1 |
What the 2025 payments were for
- Food and Beverage$426.68 · 35 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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