Payment overview · 2025
General Payments
$53.88
2 reported records · 2 companies
Healthcare provider profile · identity verified
John K Liu, MD
Allopathic & Osteopathic Physicians|Internal Medicine · HUNTINGTON PARK, CA · NPI 1194739797
Verified facts
What the public records show
CMS Open Payments records show John K Liu, MD received $53.88 in general payments during 2025 across 2 reported records.
Otsuka America Pharmaceutical, Inc. accounted for 54.7% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 2 associated products.
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 |
|---|---|---|---|---|---|
| Otsuka America Pharmaceutical, Inc. | Unresolved — no canonical attribution shown | $29.48 | 54.7% | 1 | 2025 |
| Aimmune Therapeutics, Inc. | Unresolved — no canonical attribution shown | $24.40 | 45.3% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $53.88 | 2 |
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 |
|---|---|---|---|---|---|
| REXULTI Normalized: rexulti |
Drug | Otsuka America Pharmaceutical, Inc. | $29.48 | 1 | 2025 |
Source payment records
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| ZENPEP Normalized: zenpep |
Drug | Aimmune Therapeutics, Inc. | $24.40 | 1 | 2025 |
Source payment records
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* 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
No exact normalized or approved-alias overlap was found in the loaded Part D year. This does not mean the doctor never prescribed the product.
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.
No publishable same-company prescribing overlap was found in the loaded Part D year. This does not mean the doctor never prescribed a drug reported elsewhere by a paying company.
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 |
|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 801 | 173 |
| Amlodipine Besylate | Amlodipine Besylate | 491 | 88 |
| Metformin Hcl | Metformin Hcl | 376 | 65 |
| Eliquis | Apixaban | 368 | 53 |
| Levothyroxine Sodium | Levothyroxine Sodium | 366 | 70 |
| Furosemide | Furosemide | 332 | 70 |
| Tamsulosin Hcl | Tamsulosin Hcl | 315 | 71 |
| Pantoprazole Sodium | Pantoprazole Sodium | 314 | 85 |
| Gabapentin | Gabapentin | 296 | 64 |
| Donepezil Hcl | Donepezil Hcl | 266 | 45 |
| Losartan Potassium | Losartan Potassium | 248 | 50 |
| Metoprolol Tartrate | Metoprolol Tartrate | 248 | 47 |
| Famotidine | Famotidine | 228 | 44 |
| Memantine Hcl | Memantine Hcl | 227 | 35 |
| Quetiapine Fumarate | Quetiapine Fumarate | 216 | 47 |
| Levetiracetam | Levetiracetam | 201 | 34 |
| Lisinopril | Lisinopril | 189 | 40 |
| Potassium Chloride | Potassium Chloride | 166 | 40 |
| Clopidogrel | Clopidogrel Bisulfate | 144 | 35 |
| Carvedilol | Carvedilol | 141 | 29 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 136 | 41 |
| Omeprazole | Omeprazole | 134 | 27 |
| Hydralazine Hcl | Hydralazine Hcl | 120 | 30 |
| Montelukast Sodium | Montelukast Sodium | 115 | 16 |
| Finasteride | Finasteride | 108 | 26 |
| Lactulose | Lactulose | 107 | 33 |
| Ipratropium-Albuterol | Ipratropium/Albuterol Sulfate | 101 | 51 |
| Mirtazapine | Mirtazapine | 101 | 25 |
| Tramadol Hcl | Tramadol Hcl | 98 | 24 |
| Humulin R | Insulin Regular, Human | 91 | 34 |
| Jardiance | Empagliflozin | 90 | 15 |
| Allopurinol | Allopurinol | 89 | 15 |
| Clonidine Hcl | Clonidine Hcl | 82 | 31 |
| Metoprolol Succinate | Metoprolol Succinate | 82 | 19 |
| Simvastatin | Simvastatin | 80 | 18 |
| Midodrine Hcl | Midodrine Hcl | 79 | 18 |
| Trazodone Hcl | Trazodone Hcl | 78 | 22 |
| Risperidone | Risperidone | 77 | 14 |
| Spironolactone | Spironolactone | 74 | 13 |
| Escitalopram Oxalate | Escitalopram Oxalate | 72 | 16 |
| Diclofenac Sodium | Diclofenac Sodium | 69 | 12 |
| Glipizide | Glipizide | 69 | 15 |
| Divalproex Sodium | Divalproex Sodium | 67 | 16 |
| Lorazepam | Lorazepam | 67 | 28 |
| Alendronate Sodium | Alendronate Sodium | 66 | 19 |
| Novolin R | Insulin Regular, Human | 66 | 15 |
| Ondansetron Hcl | Ondansetron Hcl | 65 | 50 |
| Enoxaparin Sodium | Enoxaparin Sodium | 57 | suppressed |
| Nitrofurantoin Mono-Macro | Nitrofurantoin Monohyd/M-Cryst | 57 | 39 |
| Carbidopa-Levodopa | Carbidopa/Levodopa | 56 | suppressed |
| Megestrol Acetate | Megestrol Acetate | 54 | 18 |
| Celecoxib | Celecoxib | 51 | suppressed |
| Amiodarone Hcl | Amiodarone Hcl | 49 | 14 |
| Duloxetine Hcl | Duloxetine Hcl | 49 | suppressed |
| Glucagon Emergency Kit | Glucagon | 48 | 17 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 46 | 22 |
| Prednisone | Prednisone | 46 | 14 |
| Lantus Solostar | Insulin Glargine,hum.Rec.Anlog | 45 | 13 |
| Myrbetriq | Mirabegron | 42 | suppressed |
| Triamcinolone Acetonide | Triamcinolone Acetonide | 42 | 24 |
| Januvia | Sitagliptin Phosphate | 41 | suppressed |
| Sevelamer Carbonate | Sevelamer Carbonate | 41 | suppressed |
| Amantadine | Amantadine Hcl | 40 | suppressed |
| Latanoprost | Latanoprost | 40 | 11 |
| Oxybutynin Chloride | Oxybutynin Chloride | 40 | suppressed |
| Sodium Chloride | 0.9 % Sodium Chloride | 40 | 24 |
| Citalopram Hbr | Citalopram Hydrobromide | 38 | suppressed |
| Cephalexin | Cephalexin | 37 | 28 |
| Lidocaine | Lidocaine | 36 | suppressed |
| Sertraline Hcl | Sertraline Hcl | 36 | 15 |
| Levofloxacin | Levofloxacin | 35 | 30 |
| Atenolol | Atenolol | 34 | suppressed |
| Buspirone Hcl | Buspirone Hcl | 34 | suppressed |
| Nifedipine Er | Nifedipine | 34 | suppressed |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 34 | 12 |
| Baclofen | Baclofen | 33 | suppressed |
| Pregabalin | Pregabalin | 33 | suppressed |
| Sucralfate | Sucralfate | 33 | suppressed |
| Paroxetine Hcl | Paroxetine Hcl | 32 | suppressed |
| Timolol Maleate | Timolol Maleate | 31 | suppressed |
| Isosorbide Mononitrate Er | Isosorbide Mononitrate | 30 | 11 |
| Methenamine Hippurate | Methenamine Hippurate | 30 | suppressed |
| Temazepam | Temazepam | 30 | 12 |
| Metolazone | Metolazone | 29 | suppressed |
| Olanzapine | Olanzapine | 28 | suppressed |
| Basaglar Kwikpen U-100 | Insulin Glargine,hum.Rec.Anlog | 27 | suppressed |
| Glucagon Emergency Kit | Glucagon Hcl | 27 | 11 |
| Sevelamer Hcl | Sevelamer Hcl | 27 | suppressed |
| Vancomycin Hcl | Vancomycin/Water For Inj (Peg) | 27 | suppressed |
| Benazepril Hcl | Benazepril Hcl | 26 | suppressed |
| Icosapent Ethyl | Icosapent Ethyl | 26 | suppressed |
| Fluticasone Propionate | Fluticasone Propionate | 25 | suppressed |
| Lantus | Insulin Glargine,hum.Rec.Anlog | 25 | suppressed |
| Nystatin | Nystatin | 25 | 17 |
| Xarelto | Rivaroxaban | 25 | suppressed |
| Brilinta | Ticagrelor | 24 | suppressed |
| Clonazepam | Clonazepam | 24 | suppressed |
| Ezetimibe | Ezetimibe | 24 | suppressed |
| Hydrochlorothiazide | Hydrochlorothiazide | 24 | suppressed |
| Sulfamethoxazole-Trimethoprim | Sulfamethoxazole/Trimethoprim | 24 | 20 |
| Entresto | Sacubitril/Valsartan | 23 | suppressed |
| Humalog | Insulin Lispro | 23 | suppressed |
| Lacosamide | Lacosamide | 23 | suppressed |
| Acetaminophen-Codeine | Acetaminophen With Codeine | 22 | 11 |
| Nitroglycerin | Nitroglycerin | 22 | 14 |
| Brimonidine Tartrate | Brimonidine Tartrate | 21 | suppressed |
| Isosorbide Dinitrate | Isosorbide Dinitrate | 21 | suppressed |
| Phenytoin Sodium Extended | Phenytoin Sodium Extended | 21 | suppressed |
| Esomeprazole Magnesium | Esomeprazole Magnesium | 20 | suppressed |
| Glimepiride | Glimepiride | 20 | suppressed |
| Meloxicam | Meloxicam | 20 | suppressed |
| Azithromycin | Azithromycin | 19 | 17 |
| Bethanechol Chloride | Bethanechol Chloride | 19 | suppressed |
| Clonidine | Clonidine | 19 | suppressed |
| Digoxin | Digoxin | 19 | suppressed |
| Diltiazem Hcl | Diltiazem Hcl | 19 | suppressed |
| Fluvoxamine Maleate | Fluvoxamine Maleate | 19 | suppressed |
| Metoclopramide Hcl | Metoclopramide Hcl | 19 | suppressed |
| Tradjenta | Linagliptin | 19 | suppressed |
| Albuterol Sulfate | Albuterol Sulfate | 18 | 13 |
| Amoxicillin | Amoxicillin | 18 | 15 |
| Azelastine Hcl | Azelastine Hcl | 18 | suppressed |
| Calcium Acetate | Calcium Acetate | 18 | suppressed |
| Cyclosporine | Cyclosporine | 18 | suppressed |
| Permethrin | Permethrin | 18 | 14 |
| Primidone | Primidone | 18 | suppressed |
| Clotrimazole | Clotrimazole | 17 | suppressed |
| Farxiga | Dapagliflozin Propanediol | 17 | suppressed |
| Fluoxetine Hcl | Fluoxetine Hcl | 17 | suppressed |
| Ibuprofen | Ibuprofen | 17 | 11 |
| Insulin Lispro | Insulin Lispro | 17 | suppressed |
| Aripiprazole | Aripiprazole | 16 | suppressed |
| Dutasteride | Dutasteride | 16 | suppressed |
| Oxycodone-Acetaminophen | Oxycodone Hcl/Acetaminophen | 16 | suppressed |
| Propranolol Hcl | Propranolol Hcl | 16 | suppressed |
| Valsartan | Valsartan | 16 | suppressed |
| Carbamazepine | Carbamazepine | 15 | suppressed |
| Ceftriaxone | Ceftriaxone Sodium | 15 | 14 |
| Colchicine | Colchicine | 15 | suppressed |
| Pravastatin Sodium | Pravastatin Sodium | 15 | suppressed |
| Ammonium Lactate | Ammonium Lactate | 14 | suppressed |
| Calcitriol | Calcitriol | 14 | suppressed |
| Cyclobenzaprine Hcl | Cyclobenzaprine Hcl | 14 | suppressed |
| Estradiol | Estradiol | 14 | suppressed |
| Heparin Sodium | Heparin Sodium,porcine | 14 | suppressed |
| Insulin Aspart Flexpen | Insulin Aspart | 14 | suppressed |
| Lovastatin | Lovastatin | 14 | suppressed |
| Oxcarbazepine | Oxcarbazepine | 14 | suppressed |
| Pioglitazone Hcl | Pioglitazone Hcl | 14 | suppressed |
| Silver Sulfadiazine | Silver Sulfadiazine | 14 | suppressed |
| Cilostazol | Cilostazol | 13 | suppressed |
| Donepezil Hcl Odt | Donepezil Hcl | 13 | suppressed |
| Hydromorphone Hcl | Hydromorphone Hcl | 13 | suppressed |
| Lansoprazole | Lansoprazole | 13 | suppressed |
| Liothyronine Sodium | Liothyronine Sodium | 13 | suppressed |
| Olmesartan Medoxomil | Olmesartan Medoxomil | 13 | suppressed |
| Topiramate | Topiramate | 13 | suppressed |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 12 | 11 |
| Calcitonin-Salmon | Calcitonin,salmon,synthetic | 12 | suppressed |
| Ciprofloxacin Hcl | Ciprofloxacin Hcl | 12 | suppressed |
| Fluticasone-Salmeterol | Fluticasone Propion/Salmeterol | 12 | suppressed |
| Hydroxyzine Hcl | Hydroxyzine Hcl | 12 | suppressed |
| Lithium Carbonate | Lithium Carbonate | 12 | suppressed |
| Mupirocin | Mupirocin | 12 | suppressed |
| Novolin N | Insulin Nph Human Isophane | 12 | suppressed |
| Nystop | Nystatin | 12 | 11 |
| Prazosin Hcl | Prazosin Hcl | 12 | suppressed |
| Santyl | Collagenase Clostridium Hist. | 12 | suppressed |
| Valproic Acid | Valproic Acid | 12 | suppressed |
| Velphoro | Sucroferric Oxyhydroxide | 12 | suppressed |
| Clobetasol Propionate | Clobetasol Propionate | 11 | suppressed |
| Divalproex Sodium Er | Divalproex Sodium | 11 | suppressed |
| Doxycycline Hyclate | Doxycycline Hyclate | 11 | suppressed |
| Enalapril Maleate | Enalapril Maleate | 11 | suppressed |
| Ketoconazole | Ketoconazole | 11 | suppressed |
| Linzess | Linaclotide | 11 | suppressed |
| Novolin R Flexpen | Insulin Regular, Human | 11 | suppressed |
| Prednisolone Acetate | Prednisolone Acetate | 11 | suppressed |
| Theophylline Er | Theophylline Anhydrous | 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 | $53.88 · 2 records | Otsuka America Pharmaceutical, Inc. | REXULTI, ZENPEP | — | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- 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