Total Payments
$6,589
2024 Payments
$940.87
Companies
28
Transactions
489
Medicare Patients
1,313
Medicare Billing
$305,161
Payment Breakdown by Category
Food & Beverage$6,160 (93.5%)
Education$278.96 (4.2%)
Consulting$150.00 (2.3%)
Other$0.00 (0.0%)
Payments by Nature
| Nature of Payment | Amount | Transactions | Share |
|---|---|---|---|
| Food and Beverage | $6,160 | 484 | 93.5% |
| Education | $278.96 | 4 | 4.2% |
| Consulting Fee | $150.00 | 1 | 2.3% |
Top Paying Companies
| Company | Total | Records | Latest Year |
|---|---|---|---|
| ABBVIE INC. | $895.33 | 79 | $0 (2024) |
| Otsuka America Pharmaceutical, Inc. | $776.04 | 41 | $0 (2024) |
| Teva Pharmaceuticals USA, Inc. | $677.94 | 79 | $0 (2024) |
| Neurocrine Biosciences, Inc. | $645.62 | 28 | $0 (2024) |
| Allergan Inc. | $555.90 | 88 | $0 (2019) |
| ITI, Inc. | $455.67 | 21 | $0 (2023) |
| Neos Therapeutics, LP | $421.78 | 27 | $0 (2024) |
| Sunovion Pharmaceuticals Inc. | $345.47 | 24 | $0 (2019) |
| Takeda Pharmaceuticals U.S.A., Inc. | $243.37 | 26 | $0 (2023) |
| Lundbeck LLC | $239.20 | 13 | $0 (2024) |
Payment History by Year
| Year | Amount | Transactions | Top Company |
|---|---|---|---|
| 2024 | $940.87 | 51 | ABBVIE INC. ($245.25) |
| 2023 | $1,816 | 117 | Otsuka America Pharmaceutical, Inc. ($319.89) |
| 2022 | $1,296 | 96 | Teva Pharmaceuticals USA, Inc. ($281.84) |
| 2021 | $601.08 | 46 | AbbVie Inc. ($177.03) |
| 2020 | $82.22 | 5 | Adlon Therapeutics L.P. ($19.69) |
| 2019 | $592.52 | 79 | Allergan Inc. ($223.00) |
| 2018 | $764.45 | 69 | Allergan Inc. ($170.63) |
| 2017 | $495.47 | 26 | Allergan Inc. ($162.27) |
All Payment Transactions
489 individual payment records from CMS Open Payments — Page 1 of 20
| Date | Company | Product | Nature | Form | Amount | Type |
|---|---|---|---|---|---|---|
| 12/17/2024 | ABBVIE INC. | VRAYLAR (Drug) | Food and Beverage | In-kind items and services | $10.17 | General |
| Category: NEUROSCIENCE | ||||||
| 12/11/2024 | E.R. Squibb & Sons, L.L.C. | COBENFY (Drug) | Education | In-kind items and services | $27.27 | General |
| Category: Psychiatry/Psychology | ||||||
| 11/26/2024 | Neurocrine Biosciences, Inc. | INGREZZA (Drug) | Food and Beverage | In-kind items and services | $25.20 | General |
| Category: Neuropsychiatry | ||||||
| 10/29/2024 | ABBVIE INC. | VRAYLAR (Drug) | Food and Beverage | In-kind items and services | $11.82 | General |
| Category: NEUROSCIENCE | ||||||
| 10/18/2024 | Neurocrine Biosciences, Inc. | INGREZZA (Drug) | Food and Beverage | In-kind items and services | $23.67 | General |
| Category: Neuropsychiatry | ||||||
| 10/15/2024 | ABBVIE INC. | VRAYLAR (Drug) | Food and Beverage | In-kind items and services | $17.56 | General |
| Category: NEUROSCIENCE | ||||||
| 10/11/2024 | ABBVIE INC. | VRAYLAR (Drug) | Food and Beverage | In-kind items and services | $23.72 | General |
| Category: NEUROSCIENCE | ||||||
| 08/27/2024 | ABBVIE INC. | VRAYLAR (Drug) | Food and Beverage | In-kind items and services | $7.14 | General |
| Category: NEUROSCIENCE | ||||||
| 08/01/2024 | ABBVIE INC. | VRAYLAR (Drug) | Food and Beverage | In-kind items and services | $9.72 | General |
| Category: NEUROSCIENCE | ||||||
| 07/09/2024 | ABBVIE INC. | VRAYLAR (Drug) | Food and Beverage | In-kind items and services | $6.62 | General |
| Category: NEUROSCIENCE | ||||||
| 07/08/2024 | Supernus Pharmaceuticals, Inc. | Qelbree (Drug) | Food and Beverage | In-kind items and services | $15.00 | General |
| Category: VILOXAZINE HYDROCHLORIDE | ||||||
| 07/02/2024 | ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) | CAPLYTA (Drug) | Food and Beverage | In-kind items and services | $19.10 | General |
| Category: PSYCHIATRY | ||||||
| 06/25/2024 | ABBVIE INC. | VRAYLAR (Drug) | Food and Beverage | In-kind items and services | $3.76 | General |
| Category: NEUROSCIENCE | ||||||
| 06/18/2024 | Teva Pharmaceuticals USA, Inc. | Austedo XR (Drug) | Food and Beverage | In-kind items and services | $14.23 | General |
| Category: Central Nervous System | ||||||
| 06/11/2024 | ABBVIE INC. | VRAYLAR (Drug) | Food and Beverage | In-kind items and services | $6.62 | General |
| Category: NEUROSCIENCE | ||||||
| 06/06/2024 | Neurocrine Biosciences, Inc. | INGREZZA (Drug) | Food and Beverage | In-kind items and services | $25.09 | General |
| Category: Neuropsychiatry | ||||||
| 06/04/2024 | Supernus Pharmaceuticals, Inc. | Qelbree (Drug) | Food and Beverage | In-kind items and services | $25.14 | General |
| Category: VILOXAZINE HYDROCHLORIDE | ||||||
| 06/04/2024 | Otsuka America Pharmaceutical, Inc. | REXULTI (Drug) | Food and Beverage | In-kind items and services | $21.29 | General |
| Category: PSYCHIATRY | ||||||
| 05/29/2024 | Teva Pharmaceuticals USA, Inc. | UZEDY (Drug) | Food and Beverage | In-kind items and services | $23.39 | General |
| Category: Neurology | ||||||
| 05/28/2024 | ABBVIE INC. | VRAYLAR (Drug) | Food and Beverage | In-kind items and services | $8.80 | General |
| Category: NEUROSCIENCE | ||||||
| 05/23/2024 | Neos Therapeutics, LP | Adzenys XR-ODT (Drug) | Food and Beverage | Cash or cash equivalent | $17.56 | General |
| Category: ADHD | ||||||
| 05/21/2024 | Lundbeck LLC | REXULTI (Drug) | Food and Beverage | Cash or cash equivalent | $27.68 | General |
| Category: PSYCHIATRY | ||||||
| 05/21/2024 | ABBVIE INC. | VRAYLAR (Drug) | Food and Beverage | In-kind items and services | $5.96 | General |
| Category: NEUROSCIENCE | ||||||
| 05/14/2024 | ABBVIE INC. | VRAYLAR (Drug) | Food and Beverage | In-kind items and services | $20.95 | General |
| Category: NEUROSCIENCE | ||||||
| 05/07/2024 | ABBVIE INC. | VRAYLAR (Drug) | Food and Beverage | In-kind items and services | $17.82 | General |
| Category: NEUROSCIENCE | ||||||
Medicare Billing by Year
| Year | Procedures | Beneficiaries | Services | Submitted | Medicare Paid |
|---|---|---|---|---|---|
| 2023 | 3 | 223 | 697 | $109,990 | $53,232 |
| 2022 | 3 | 236 | 861 | $121,170 | $68,219 |
| 2021 | 5 | 351 | 1,078 | $136,220 | $82,977 |
| 2020 | 6 | 503 | 1,469 | $175,630 | $100,734 |
Total Patients
1,313
Total Services
4,105
Medicare Billing
$305,161
Procedure Codes
17
All Medicare Procedures & Services
17 procedure records from CMS Medicare Utilization
| HCPCS | Description | Setting | Year | Patients | Services | Charges | Medicare Paid | Ratio |
|---|---|---|---|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | Office | 2023 | 99 | 355 | $57,435 | $29,493 | 51.4% |
| 90838 | Psychotherapy with evaluation and management visit, 1 hour | Office | 2023 | 77 | 237 | $38,080 | $18,255 | 47.9% |
| 90836 | Psychotherapy with evaluation and management visit, 45 minutes | Office | 2023 | 47 | 105 | $14,475 | $5,484 | 37.9% |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | Office | 2022 | 116 | 443 | $66,480 | $38,766 | 58.3% |
| 90838 | Psychotherapy with evaluation and management visit, 1 hour | Office | 2022 | 56 | 224 | $31,360 | $17,997 | 57.4% |
| 90836 | Psychotherapy with evaluation and management visit, 45 minutes | Office | 2022 | 64 | 194 | $23,330 | $11,455 | 49.1% |
| 99214 | Established patient outpatient visit, total time 30-39 minutes | Office | 2021 | 142 | 526 | $68,250 | $45,799 | 67.1% |
| 90838 | Psychotherapy with evaluation and management visit, 60 minutes | Office | 2021 | 80 | 232 | $32,480 | $18,911 | 58.2% |
| 90836 | Psychotherapy with evaluation and management visit, 45 minutes | Office | 2021 | 105 | 272 | $32,640 | $16,764 | 51.4% |
| 90833 | Psychotherapy performed with evaluation and management visit, 30 minutes | Office | 2021 | 13 | 26 | $2,080 | $1,269 | 61.0% |
| 90785 | Interactive complexity | Office | 2021 | 11 | 22 | $770.00 | $233.40 | 30.3% |
| 99214 | Established patient office or other outpatient, visit typically 25 minutes | Office | 2020 | 187 | 713 | $85,560 | $49,970 | 58.4% |
| 90836 | Psychotherapy, 45 minutes | Office | 2020 | 149 | 371 | $44,520 | $23,289 | 52.3% |
| 90838 | Psychotherapy, 60 minutes | Office | 2020 | 86 | 237 | $33,180 | $19,633 | 59.2% |
| 90833 | Psychotherapy, 30 minutes | Office | 2020 | 53 | 109 | $8,720 | $5,499 | 63.1% |
| 99215 | Established patient office or other outpatient, visit typically 40 minutes | Office | 2020 | 16 | 21 | $3,160 | $2,135 | 67.6% |
| 90785 | Interactive complexity | Office | 2020 | 12 | 18 | $490.00 | $208.54 | 42.6% |
About Dr. Tammy Chen, M.D
Dr. Tammy Chen, M.D is a Psychiatry healthcare provider based in Rock Hill, South Carolina. This provider has been registered with the National Plan and Provider Enumeration System (NPPES) since 02/02/2007. The National Provider Identifier (NPI) number assigned to this provider is 1013055706.
According to the Centers for Medicare & Medicaid Services (CMS) Open Payments database, Dr. Tammy Chen, M.D has received a total of $6,589 in payments from pharmaceutical and medical device companies, with $940.87 received in 2024. These payments were reported across 489 transactions from 28 companies. The most common payment nature is "Food and Beverage" ($6,160).
As a Medicare-enrolled provider, Chen has provided services to 1,313 Medicare beneficiaries, totaling 4,105 services with total Medicare billing of $305,161. Data is available for 4 years (2020–2023), covering 17 distinct procedure/service records.
Ad
Practice Information
- Specialty Psychiatry
- Location Rock Hill, SC
- Active Since 02/02/2007
- Last Updated 01/23/2013
- Taxonomy Code 2084P0800X
- Entity Type Individual
- Practice Solo Practitioner
- NPI Number 1013055706
Products in Payments
- VRAYLAR (Drug) $1,414
- REXULTI (Drug) $829.59
- INGREZZA (Drug) $645.62
- CAPLYTA (Drug) $493.30
- Adzenys XR-ODT (Drug) $421.78
- LATUDA (Drug) $345.47
- AUSTEDO (Drug) $297.61
- INVEGA SUSTENNA (Drug) $158.29
- LOREEV XR (Drug) $143.18
- NUEDEXTA (Drug) $141.80
- Austedo XR (Drug) $135.24
- APLENZIN (Drug) $112.59
- TRINTELLIX (Drug) $97.61
- Trintellix (Drug) $94.81
- QUVIVIQ (Drug) $93.54
- QELBREE (Drug) $64.79
- ABILIFY MYCITE (Drug) $61.00
- Qelbree (Drug) $60.14
- ABILIFY MAINTENA (Drug) $58.43
- Wakix (Drug) $53.46
Explore
Data Sources
Provider data from NPPES. Payment data from CMS Open Payments. Medicare data from CMS Medicare Provider Utilization. All data is public and updated periodically.
Psychiatry Doctors in Rock Hill
Jagdish Shah, M.d, M.D
Psychiatry — Payments: $460,054
Psychiatry $460,054
Dr. Hayne Mcmeekin, Md, MD
Psychiatry — Payments: $6,928
Psychiatry $6,928
Dr. Lauren Tucker, M.d, M.D
Psychiatry — Payments: $851.21
Psychiatry $851.21
Katie Chambers, Md, MD
Psychiatry — Payments: $386.55
Psychiatry $386.55
Dr. Brian Mika, Md, MD
Psychiatry — Payments: $346.04
Psychiatry $346.04
Dr. Ami Patel, M.d, M.D
Psychiatry — Payments: $292.98
Psychiatry $292.98