Payment overview · 2025
General Payments
$135,431.79
196 reported records · 11 companies
Healthcare provider profile · identity verified
Steve S Chung, M.D.
Allopathic & Osteopathic Physicians|Psychiatry & Neurology|Neurology · PHOENIX, AZ · NPI 1942317359
Verified facts
What the public records show
CMS Open Payments records show Steve S Chung, M.D. received $135,431.79 in general payments during 2025 across 196 reported records.
JAZZ PHARMACEUTICALS INC. accounted for 29.4% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 13 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Briviact, Epidiolex, Fycompa, Nayzilam, Valtoco, Xcopri.
CATALYST PHARMACEUTICALS, INC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported FYCOMPA as an associated drug or biological on 3130 records involving 1101 distinct recipient NPIs. Public Medicare Part D data also shows 62 claims for Fycompa by this doctor in 2024.
JAZZ PHARMACEUTICALS INC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported EPIDIOLEX as an associated drug or biological on 10990 records involving 3626 distinct recipient NPIs. Public Medicare Part D data also shows 43 claims for Epidiolex by this doctor in 2024.
Neurelis, Inc. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported VALTOCO as an associated drug or biological on 16082 records involving 5567 distinct recipient NPIs. Public Medicare Part D data also shows 11 claims for Valtoco by this doctor in 2024.
SK Life Science, Inc. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported XCOPRI as an associated drug or biological on 1992 records involving 782 distinct recipient NPIs. Public Medicare Part D data also shows 115 claims for Xcopri by this doctor in 2024.
UCB, Inc. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported Briviact as an associated drug or biological on 13595 records involving 4444 distinct recipient NPIs. Public Medicare Part D data also shows 162 claims for Briviact by this doctor in 2024.
UCB, Inc. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported Nayzilam as an associated drug or biological on 9542 records involving 3826 distinct recipient NPIs. Public Medicare Part D data also shows 20 claims for Nayzilam by this doctor in 2024.
These records do not establish that a payment influenced prescribing or medical care.
Separate record types
Research & Ownership
Research Payments (direct recipient): not present in the loaded data
Associated Research Funding (for example, named PI): not present in the loaded data
Ownership / Investment: not present in the loaded data
These categories are never added into the General Payments headline. Associated research funding must not be described as money the doctor personally received unless the source record supports that conclusion.
Who paid this doctor?
Companies in 2025 General Payments
| Reported company | Canonical company | Amount | Share | Records | Year |
|---|---|---|---|---|---|
| JAZZ PHARMACEUTICALS INC. | Unresolved — no canonical attribution shown | $39,743.04 | 29.4% | 52 | 2025 |
| SK Life Science, Inc. |
SK Life Science, Inc. exact · evidence 2025-04-03 |
$38,544.67 | 28.5% | 51 | 2025 |
| Neurelis, Inc. |
Neurelis, Inc. exact · evidence 2025-02-20 |
$24,826.93 | 18.3% | 44 | 2025 |
| UCB, Inc. | Unresolved — no canonical attribution shown | $15,403.00 | 11.4% | 29 | 2025 |
| UCB SA | Unresolved — no canonical attribution shown | $12,923.67 | 9.5% | 3 | 2025 |
| Lundbeck LLC | Unresolved — no canonical attribution shown | $3,274.10 | 2.4% | 2 | 2025 |
| NEUROPACE, INC. | Unresolved — no canonical attribution shown | $213.46 | 0.2% | 6 | 2025 |
| Medtronic, Inc. |
Medtronic, Inc. exact · evidence 2025-07-22 |
$201.51 | 0.1% | 3 | 2025 |
| CATALYST PHARMACEUTICALS, INC. | Unresolved — no canonical attribution shown | $133.48 | 0.1% | 1 | 2025 |
| ACADIA Pharmaceuticals Inc | Unresolved — no canonical attribution shown | $95.75 | 0.1% | 1 | 2025 |
| LivaNova USA, Inc. | Unresolved — no canonical attribution shown | $72.18 | 0.1% | 4 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program | $70,130.00 | 22 |
| Honoraria | $35,775.00 | 11 |
| Travel and Lodging | $18,880.24 | 77 |
| Consulting Fee | $5,805.80 | 1 |
| Food and Beverage | $4,840.75 | 85 |
A meal, consulting fee, royalty, and travel payment describe different kinds of reported relationships and should not be interpreted as equivalent.
Analysis 1 · Payment-linked products
Products named in Open Payments records
| Reported product | Type | Reported company | Related amount* | Records | Year |
|---|---|---|---|---|---|
| EPIDIOLEX Normalized: epidiolex |
Drug | JAZZ PHARMACEUTICALS INC. | $39,743.04 | 52 | 2025 |
Source payment records
|
|||||
| XCOPRI Normalized: xcopri |
Drug | SK Life Science, Inc. | $37,802.62 | 40 | 2025 |
Source payment records
|
|||||
| VALTOCO Normalized: valtoco |
Drug | Neurelis, Inc. | $24,826.93 | 44 | 2025 |
Source payment records
|
|||||
| Fintepla Normalized: fintepla |
Drug | UCB SA, UCB, Inc. | $13,455.81 | 9 | 2025 |
Source payment records
|
|||||
| Nayzilam Normalized: nayzilam |
Drug | UCB, Inc. | $11,338.51 | 12 | 2025 |
Source payment records
|
|||||
| Briviact Normalized: briviact |
Drug | UCB, Inc. | $3,365.68 | 6 | 2025 |
Source payment records
|
|||||
| RNS Neurostimulator Kit Normalized: rns neurostimulator kit |
Device | NEUROPACE, INC. | $213.46 | 6 | 2025 |
Source payment records
|
|||||
| PERCEPT PC BRAINSENSE Normalized: percept pc brainsense |
Device | Medtronic, Inc. | $182.60 | 2 | 2025 |
Source payment records
|
|||||
| FYCOMPA Normalized: fycompa |
Drug | CATALYST PHARMACEUTICALS, INC. | $133.48 | 1 | 2025 |
Source payment records
|
|||||
| DAYBUE Normalized: daybue |
Drug | ACADIA Pharmaceuticals Inc | $95.75 | 1 | 2025 |
Source payment records
|
|||||
| VNS THERAPY SENTIVA MODEL 1000 GENERATOR Normalized: vns therapy sentiva model 1000 generator |
Device | LivaNova USA, Inc. | $54.99 | 3 | 2025 |
Source payment records
|
|||||
| SENSIGHT Normalized: sensight |
Device | Medtronic, Inc. | $18.91 | 1 | 2025 |
Source payment records
|
|||||
| VNS Therapy Normalized: vns therapy |
Device | LivaNova USA, Inc. | $17.19 | 1 | 2025 |
Source payment records
|
|||||
* Product-associated amounts are non-additive because one payment record may name more than one product.
These products were named on specific Open Payments records. A named product does not show that the payment influenced treatment or prescribing.
Public prescribing for products named in payments
| Open Payments product | Payment year | Part D brand | Part D year | Claims | Match method | Source |
|---|---|---|---|---|---|---|
| Briviact briviact |
2025 | Briviact | 2024 | 162 | exact normalized | Medicare Part D |
| EPIDIOLEX epidiolex |
2025 | Epidiolex | 2024 | 43 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| FYCOMPA fycompa |
2025 | Fycompa | 2024 | 62 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| Nayzilam nayzilam |
2025 | Nayzilam | 2024 | 20 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| VALTOCO valtoco |
2025 | Valtoco | 2024 | 11 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| XCOPRI xcopri |
2025 | Xcopri | 2024 | 115 | exact normalized | Medicare Part D |
The presence of the same drug in both datasets does not show that a payment caused or influenced a prescription.
Analysis 2 · Same-company prescribing overlap
Drugs reported in other payments from the same company that also appear in Medicare Part D
This analysis is independent from products named on this doctor’s individual payment records. A row appears only when the exact Open Payments reporting entity paid this doctor, that same reporting entity reported the drug or biological on at least 10 loaded General Payment records involving at least 2 distinct recipient NPIs, and this doctor has the same non-generic brand in public Part D data. This does not mean the company owns or manufactures the drug.
| Paying company | Payment year | Drug reported by same entity | Open Payments evidence | Part D | Claims | Beneficiaries |
|---|---|---|---|---|---|---|
| CATALYST PHARMACEUTICALS, INC. Exact reporting entity; no affiliate inference |
2025 | FYCOMPA open payments reported associated product |
CMS Open Payments — General Payments 3130 supporting records · 1101 recipient NPIs · example record 1253216846 |
Fycompa · 2024 Exact normalized brand match · 1 Part D row |
62 | suppressed by CMS |
| JAZZ PHARMACEUTICALS INC. Exact reporting entity; no affiliate inference |
2025 | EPIDIOLEX open payments reported associated product |
CMS Open Payments — General Payments 10990 supporting records · 3626 recipient NPIs · example record 1234297758 |
Epidiolex · 2024 Exact normalized brand match · 1 Part D row |
43 | suppressed by CMS |
| Neurelis, Inc. Exact reporting entity; no affiliate inference |
2025 | VALTOCO open payments reported associated product |
CMS Open Payments — General Payments 16082 supporting records · 5567 recipient NPIs · example record 1219183925 |
Valtoco · 2024 Exact normalized brand match · 1 Part D row |
11 | suppressed by CMS |
| SK Life Science, Inc. Exact reporting entity; no affiliate inference |
2025 | XCOPRI open payments reported associated product |
CMS Open Payments — General Payments 1992 supporting records · 782 recipient NPIs · example record 1252276115 |
Xcopri · 2024 Exact normalized brand match · 1 Part D row |
115 | 14 |
| UCB, Inc. Exact reporting entity; no affiliate inference |
2025 | Briviact open payments reported associated product |
CMS Open Payments — General Payments 13595 supporting records · 4444 recipient NPIs · example record 1224348489 |
Briviact · 2024 Exact normalized brand match · 1 Part D row |
162 | 17 |
| UCB, Inc. Exact reporting entity; no affiliate inference |
2025 | Nayzilam open payments reported associated product |
CMS Open Payments — General Payments 9542 supporting records · 3826 recipient NPIs · example record 1224348539 |
Nayzilam · 2024 Exact normalized brand match · 1 Part D row |
20 | suppressed by CMS |
These facts do not show that a payment was for the drug, that the company owns or manufactures the drug, or that a payment caused or influenced prescribing.
Public Medicare Part D data
Provider-and-drug rows loaded for 2024
| Brand | Generic | Claims | Beneficiaries |
|---|---|---|---|
| Levetiracetam | Levetiracetam | 257 | 44 |
| Lamotrigine | Lamotrigine | 236 | 35 |
| Lacosamide | Lacosamide | 205 | 33 |
| Clobazam | Clobazam | 167 | 22 |
| Briviact | Brivaracetam | 162 | 17 |
| Zonisamide | Zonisamide | 144 | 25 |
| Clonazepam | Clonazepam | 118 | 26 |
| Xcopri | Cenobamate | 115 | 14 |
| Topiramate | Topiramate | 90 | 20 |
| Aptiom | Eslicarbazepine Acetate | 79 | 12 |
| Divalproex Sodium | Divalproex Sodium | 68 | 11 |
| Fycompa | Perampanel | 62 | suppressed |
| Oxcarbazepine | Oxcarbazepine | 47 | suppressed |
| Epidiolex | Cannabidiol (Cbd) | 43 | suppressed |
| Gabapentin | Gabapentin | 39 | suppressed |
| Phenobarbital | Phenobarbital | 38 | suppressed |
| Clorazepate Dipotassium | Clorazepate Dipotassium | 34 | suppressed |
| Valproic Acid | Valproic Acid (As Sodium Salt) | 29 | suppressed |
| Divalproex Sodium Er | Divalproex Sodium | 25 | suppressed |
| Tegretol Xr | Carbamazepine | 23 | suppressed |
| Diazepam | Diazepam | 20 | suppressed |
| Escitalopram Oxalate | Escitalopram Oxalate | 20 | suppressed |
| Nayzilam | Midazolam | 20 | suppressed |
| Lamotrigine Er | Lamotrigine | 19 | suppressed |
| Carbamazepine | Carbamazepine | 18 | suppressed |
| Propranolol Hcl | Propranolol Hcl | 17 | suppressed |
| Sertraline Hcl | Sertraline Hcl | 13 | suppressed |
| Keppra | Levetiracetam | 12 | suppressed |
| Primidone | Primidone | 12 | suppressed |
| Felbamate | Felbamate | 11 | suppressed |
| Onfi | Clobazam | 11 | suppressed |
| Rufinamide | Rufinamide | 11 | suppressed |
| Valtoco | Diazepam | 11 | suppressed |
| Vimpat | Lacosamide | 11 | suppressed |
Timeline
Payment and prescribing data by year
Open Payments and Medicare Part D may refer to different years. They are shown separately rather than aligned as if they describe the same period.
| Year | General Payments | Main payer | Explicit products | Company overlaps | Part D coverage |
|---|---|---|---|---|---|
| 2025 | $135,431.79 · 196 records | JAZZ PHARMACEUTICALS INC. | Briviact, DAYBUE, EPIDIOLEX, FYCOMPA, Fintepla, Nayzilam, PERCEPT PC BRAINSENSE, RNS Neurostimulator Kit, SENSIGHT, VALTOCO, VNS THERAPY SENTIVA MODEL 1000 GENERATOR, VNS Therapy, XCOPRI | 6 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- What role, if any, does Briviact play in your treatment recommendations for me?
- How do you evaluate evidence when you have a financial relationship with CATALYST PHARMACEUTICALS, INC.?
- Are there reasonable alternatives I should understand when we discuss treatment options?
- How should I interpret the industry-payment records shown here in the context of my care?
These are general questions generated from reviewed templates. They are not personalized medical advice.
Sources and limitations
How to read this page
- Payment and Medicare prescribing data can cover different years; every comparison shows both years explicitly.
- Part D does not represent a doctor’s entire practice; it excludes many patients and is subject to CMS public-release thresholds.
- Company–drug relationships must have an auditable source, a precise relationship type, and a valid evidence period. Unresolved mappings are not published.
- Generic drug claims are not attributed to a specific manufacturer without manufacturer-level evidence.
- When a source extract is incomplete, missing rows are never treated as proof of no payments or no prescriptions.
Loaded source releases
| Dataset | Year | Publication | Source |
|---|---|---|---|
| CMS Open Payments — General Payments | 2025 | 2026-06-30 | Original source |
| Medicare Part D Prescribers by Provider and Drug | 2024 | 2026-05-06 | Original source |
| NPPES Data Dissemination V2 | current / reference data | 2026-08-10 | Original source |
Full methodology · Questions & answers · Report a possible error