Total Payments
$16,321
2024 Payments
$3,432
Companies
62
Transactions
783
Medicare Patients
2,435
Medicare Billing
$514,854
Payment Breakdown by Category
Food & Beverage$14,944 (91.6%)
Consulting$1,215 (7.4%)
Education$135.50 (0.8%)
Other$26.44 (0.2%)
Payments by Nature
| Nature of Payment | Amount | Transactions | Share |
|---|---|---|---|
| Food and Beverage | $14,944 | 771 | 91.6% |
| Consulting Fee | $1,215 | 1 | 7.4% |
| Education | $135.50 | 9 | 0.8% |
| Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program | $26.44 | 2 | 0.2% |
Top Paying Companies
| Company | Total | Records | Latest Year |
|---|---|---|---|
| Biogen, Inc. | $2,817 | 87 | $0 (2024) |
| UCB, Inc. | $1,532 | 81 | $0 (2024) |
| Novartis Pharmaceuticals Corporation | $1,107 | 74 | $0 (2024) |
| ABBVIE INC. | $1,088 | 52 | $0 (2024) |
| EMD Serono, Inc. | $907.50 | 58 | $0 (2024) |
| Grifols USA, LLC | $800.49 | 34 | $0 (2024) |
| PFIZER INC. | $592.07 | 35 | $0 (2024) |
| Allergan, Inc. | $559.91 | 38 | $0 (2021) |
| SK Life Science, Inc. | $526.38 | 27 | $0 (2024) |
| Sunovion Pharmaceuticals Inc. | $413.07 | 26 | $0 (2020) |
Payment History by Year
| Year | Amount | Transactions | Top Company |
|---|---|---|---|
| 2024 | $3,432 | 167 | UCB, Inc. ($547.87) |
| 2023 | $2,815 | 140 | UCB, Inc. ($543.16) |
| 2022 | $1,758 | 103 | Novartis Pharmaceuticals Corporation ($322.26) |
| 2021 | $1,163 | 65 | Biogen, Inc. ($243.42) |
| 2020 | $1,169 | 65 | Biogen, Inc. ($240.93) |
| 2019 | $1,632 | 71 | PORTOLA PHARMACEUTICALS, INC. ($221.89) |
| 2018 | $1,474 | 71 | Allergan Inc. ($140.16) |
| 2017 | $2,879 | 101 | Biogen, Inc. ($1,567) |
All Payment Transactions
783 individual payment records from CMS Open Payments — Page 1 of 32
| Date | Company | Product | Nature | Form | Amount | Type |
|---|---|---|---|---|---|---|
| 12/17/2024 | EMD Serono, Inc. | — | Food and Beverage | Cash or cash equivalent | $4.99 | General |
| 12/16/2024 | TG Therapeutics, Inc. | BRIUMVI (Drug) | Food and Beverage | In-kind items and services | $18.68 | General |
| Category: Immunology | ||||||
| 12/14/2024 | Grifols USA, LLC | Gamunex-C (Biological) | Food and Beverage | In-kind items and services | $33.31 | General |
| Category: Immunology and Neurology | ||||||
| 12/13/2024 | PFIZER INC. | NURTEC ODT (Drug), ZAVZPRET | Food and Beverage | In-kind items and services | $14.72 | General |
| Category: PAIN | ||||||
| 12/11/2024 | Biogen, Inc. | TYSABRI (Biological), VUMERITY | Food and Beverage | In-kind items and services | $8.62 | General |
| Category: Neurology | ||||||
| 12/10/2024 | MDD US Operations, LLC | Gocovri (Drug) | Food and Beverage | In-kind items and services | $15.29 | General |
| Category: AMANTADINE | ||||||
| 12/09/2024 | Novartis Pharmaceuticals Corporation | KESIMPTA (Drug) | Food and Beverage | In-kind items and services | $10.81 | General |
| Category: Neurology | ||||||
| 12/06/2024 | UCB, Inc. | Rystiggo (Drug) | Food and Beverage | In-kind items and services | $22.28 | General |
| Category: Neurology | ||||||
| 12/02/2024 | Celgene Corporation | ZEPOSIA (Drug) | Food and Beverage | Cash or cash equivalent | $22.65 | General |
| Category: Neuroscience | ||||||
| 11/25/2024 | Novartis Pharmaceuticals Corporation | KESIMPTA (Drug) | Food and Beverage | In-kind items and services | $15.75 | General |
| Category: Neurology | ||||||
| 11/21/2024 | Takeda Pharmaceuticals U.S.A., Inc. | HYQVIA (Biological) | Food and Beverage | In-kind items and services | $27.90 | General |
| Category: IMMUNOLOGY | ||||||
| 11/18/2024 | TG Therapeutics, Inc. | BRIUMVI (Drug) | Food and Beverage | In-kind items and services | $38.17 | General |
| Category: Immunology | ||||||
| 11/15/2024 | UCB, Inc. | Briviact (Drug) | Food and Beverage | In-kind items and services | $26.34 | General |
| Category: Neurology | ||||||
| 11/07/2024 | PFIZER INC. | NURTEC ODT (Drug), ZAVZPRET | Food and Beverage | In-kind items and services | $19.29 | General |
| Category: PAIN | ||||||
| 11/06/2024 | EMD Serono, Inc. | — | Food and Beverage | Cash or cash equivalent | $7.69 | General |
| 11/05/2024 | Novartis Pharmaceuticals Corporation | KESIMPTA (Drug) | Food and Beverage | In-kind items and services | $22.88 | General |
| Category: Neurology | ||||||
| 11/04/2024 | Alexion Pharmaceuticals, Inc. | ULTOMIRIS (Biological) | Food and Beverage | In-kind items and services | $16.08 | General |
| Category: Rare Disease | ||||||
| 10/31/2024 | TG Therapeutics, Inc. | BRIUMVI (Drug) | Food and Beverage | In-kind items and services | $23.27 | General |
| Category: Immunology | ||||||
| 10/29/2024 | SK Life Science, Inc. | — | Food and Beverage | In-kind items and services | $27.81 | General |
| 10/29/2024 | Novartis Pharmaceuticals Corporation | KESIMPTA (Drug) | Food and Beverage | In-kind items and services | $6.35 | General |
| Category: Neurology | ||||||
| 10/28/2024 | Vanda Pharmaceuticals Inc. | PONVORY (Drug) | Food and Beverage | In-kind items and services | $24.60 | General |
| Category: MULTIPLE SCLEROSIS | ||||||
| 10/24/2024 | Grifols USA, LLC | Gamunex-C (Biological) | Food and Beverage | In-kind items and services | $34.79 | General |
| Category: Immunology and Neurology | ||||||
| 10/23/2024 | EMD Serono, Inc. | — | Food and Beverage | Cash or cash equivalent | $31.14 | General |
| 10/21/2024 | Teva Pharmaceuticals USA, Inc. | Austedo XR (Drug) | Food and Beverage | In-kind items and services | $16.94 | General |
| Category: Central Nervous System | ||||||
| 10/18/2024 | Grifols USA, LLC | Gamunex-C (Biological) | Food and Beverage | In-kind items and services | $14.31 | General |
| Category: Immunology and Neurology | ||||||
Medicare Billing by Year
| Year | Procedures | Beneficiaries | Services | Submitted | Medicare Paid |
|---|---|---|---|---|---|
| 2023 | 7 | 534 | 995 | $149,219 | $103,307 |
| 2022 | 8 | 529 | 944 | $145,060 | $98,723 |
| 2021 | 13 | 643 | 1,359 | $618,769 | $121,688 |
| 2020 | 9 | 729 | 7,041 | $287,623 | $191,136 |
Total Patients
2,435
Total Services
10,339
Medicare Billing
$514,854
Procedure Codes
37
All Medicare Procedures & Services
37 procedure records from CMS Medicare Utilization — Page 1 of 2
| HCPCS | Description | Setting | Year | Patients | Services | Charges | Medicare Paid | Ratio |
|---|---|---|---|---|---|---|---|---|
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Facility | 2023 | 95 | 390 | $50,700 | $39,230 | 77.4% |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | Office | 2023 | 123 | 226 | $30,849 | $21,343 | 69.2% |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | Office | 2023 | 84 | 118 | $19,470 | $13,518 | 69.4% |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Facility | 2023 | 69 | 73 | $17,860 | $10,547 | 59.1% |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | Office | 2023 | 52 | 52 | $10,660 | $7,190 | 67.4% |
| 95819 | Measurement of brain wave activity (eeg), awake and asleep | Facility | 2023 | 95 | 120 | $12,000 | $5,744 | 47.9% |
| 95816 | Measurement of brain wave activity (eeg), awake and drowsy | Office | 2023 | 16 | 16 | $7,680 | $5,734 | 74.7% |
| 99233 | Follow-up hospital inpatient care per day, typically 35 minutes | Facility | 2022 | 90 | 323 | $41,990 | $28,003 | 66.7% |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | Office | 2022 | 117 | 220 | $28,600 | $20,535 | 71.8% |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | Office | 2022 | 87 | 136 | $22,440 | $16,261 | 72.5% |
| 99223 | Initial hospital inpatient care per day, typically 70 minutes | Facility | 2022 | 67 | 68 | $17,000 | $11,453 | 67.4% |
| 95816 | Measurement of brain wave activity (eeg), awake and drowsy | Office | 2022 | 28 | 30 | $14,400 | $10,540 | 73.2% |
| 95819 | Measurement of brain wave activity (eeg), awake and asleep | Facility | 2022 | 93 | 109 | $10,900 | $5,371 | 49.3% |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | Office | 2022 | 31 | 31 | $6,355 | $4,256 | 67.0% |
| 95886 | Needle measurement of electrical activity in arm or leg muscles, complete study | Office | 2022 | 16 | 27 | $3,375 | $2,304 | 68.3% |
| 99233 | Subsequent hospital inpatient care, typically 35 minutes per day | Facility | 2021 | 107 | 461 | $59,930 | $40,997 | 68.4% |
| 99214 | Established patient outpatient visit, total time 30-39 minutes | Office | 2021 | 121 | 230 | $29,900 | $21,349 | 71.4% |
| 99223 | Initial hospital inpatient care, typically 70 minutes per day | Facility | 2021 | 101 | 101 | $25,250 | $17,303 | 68.5% |
| 99215 | Established patient outpatient visit, total time 40-54 minutes | Office | 2021 | 72 | 94 | $15,510 | $11,911 | 76.8% |
| 95819 | Measurement and recording of brain wave (eeg) activity, awake and asleep | Facility | 2021 | 111 | 130 | $13,000 | $6,488 | 49.9% |
| G0453 | Continuous intraoperative neurophysiology monitoring, from outside the operating room (remote or nearby), per patient, (attention directed exclusively to one patient) each 15 minutes (list in addition to primary procedure) | Facility | 2021 | 14 | 207 | $146,387 | $5,895 | 4.0% |
| 95816 | Measurement and recording of brain wave (eeg) activity, awake and drowsy | Office | 2021 | 16 | 16 | $7,680 | $5,774 | 75.2% |
| 99204 | New patient outpatient visit, total time 45-59 minutes | Office | 2021 | 34 | 34 | $6,970 | $4,828 | 69.3% |
| 95911 | Nerve transmission studies, 9-10 studies | Office | 2021 | 13 | 13 | $4,745 | $2,704 | 57.0% |
| 95886 | Needle measurement and recording of electrical activity of muscles of arm or leg complete study | Office | 2021 | 15 | 28 | $3,500 | $2,665 | 76.1% |
About Dr. John Chen, M.D
Dr. John Chen, M.D is a Neurology healthcare provider based in Orange, California. This provider has been registered with the National Plan and Provider Enumeration System (NPPES) since 07/20/2006. The National Provider Identifier (NPI) number assigned to this provider is 1841210846.
According to the Centers for Medicare & Medicaid Services (CMS) Open Payments database, Dr. John Chen, M.D has received a total of $16,321 in payments from pharmaceutical and medical device companies, with $3,432 received in 2024. These payments were reported across 783 transactions from 62 companies. The most common payment nature is "Food and Beverage" ($14,944).
As a Medicare-enrolled provider, Chen has provided services to 2,435 Medicare beneficiaries, totaling 10,339 services with total Medicare billing of $514,854. Data is available for 4 years (2020–2023), covering 37 distinct procedure/service records.
Ad
Practice Information
- Specialty Neurology
- Location Orange, CA
- Active Since 07/20/2006
- Last Updated 11/20/2025
- Taxonomy Code 2084N0400X
- Entity Type Individual
- NPI Number 1841210846
Products in Payments
- ZINBRYTA (Biological) $1,336
- KESIMPTA (Drug) $888.75
- TYSABRI (Biological) $831.13
- Gamunex-C (Biological) $770.72
- BOTOX (Biological) $692.05
- Briviact (Drug) $647.25
- ANDEXXA (Biological) $514.80
- VUMERITY (Drug) $441.32
- UBRELVY (Drug) $416.60
- APTIOM (Drug) $412.63
- Fintepla (Drug) $307.99
- NURTEC ODT (Drug) $288.31
- BRIUMVI (Drug) $266.04
- ZEPOSIA (Drug) $256.31
- LYRICA (Drug) $242.11
- ULTOMIRIS (Biological) $227.60
- APOKYN (Drug) $223.85
- ACTHAR (Biological) $221.24
- MAVENCLAD (Drug) $207.83
- INGREZZA (Drug) $205.03
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.
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