Payment overview · 2025
General Payments
$47.26
3 reported records · 2 companies
Healthcare provider profile · identity verified
Catherine Chang, M.D.
Allopathic & Osteopathic Physicians|General Practice · NEWPORT BEACH, CA · NPI 1295766426
Verified facts
What the public records show
CMS Open Payments records show Catherine Chang, M.D. received $47.26 in general payments during 2025 across 3 reported records.
Salix Pharmaceuticals, a division of Bausch Health US, LLC accounted for 61.5% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 2 associated products.
Salix Pharmaceuticals, a division of Bausch Health US, LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported TRULANCE as an associated drug or biological on 2652 records involving 1501 distinct recipient NPIs. Public Medicare Part D data also shows 13 claims for Trulance 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 |
|---|---|---|---|---|---|
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | Unresolved — no canonical attribution shown | $29.05 | 61.5% | 2 | 2025 |
| Exact Sciences Corporation | Unresolved — no canonical attribution shown | $18.21 | 38.5% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $47.26 | 3 |
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 |
|---|---|---|---|---|---|
| XIFAXAN Normalized: xifaxan |
Drug | Salix Pharmaceuticals, a division of Bausch Health US, LLC | $29.05 | 2 | 2025 |
Source payment records
|
|||||
| The Cologuard Plus Collection Kit Normalized: the cologuard plus collection kit |
Device | Exact Sciences Corporation | $18.21 | 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.
| Paying company | Payment year | Drug reported by same entity | Open Payments evidence | Part D | Claims | Beneficiaries |
|---|---|---|---|---|---|---|
| Salix Pharmaceuticals, a division of Bausch Health US, LLC Exact reporting entity; no affiliate inference |
2025 | TRULANCE open payments reported associated product |
CMS Open Payments — General Payments 2652 supporting records · 1501 recipient NPIs · example record 1231775445 |
Trulance · 2024 Exact normalized brand match · 1 Part D row |
13 | 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 |
|---|---|---|---|
| Rosuvastatin Calcium | Rosuvastatin Calcium | 254 | 72 |
| Amlodipine Besylate | Amlodipine Besylate | 200 | 50 |
| Atorvastatin Calcium | Atorvastatin Calcium | 145 | 43 |
| Synthroid | Levothyroxine Sodium | 132 | 30 |
| Escitalopram Oxalate | Escitalopram Oxalate | 131 | 31 |
| Losartan Potassium | Losartan Potassium | 115 | 29 |
| Metoprolol Succinate | Metoprolol Succinate | 102 | 28 |
| Valsartan | Valsartan | 100 | 27 |
| Pantoprazole Sodium | Pantoprazole Sodium | 88 | 25 |
| Levothyroxine Sodium | Levothyroxine Sodium | 85 | 24 |
| Ezetimibe | Ezetimibe | 74 | 22 |
| Simvastatin | Simvastatin | 74 | 22 |
| Alendronate Sodium | Alendronate Sodium | 73 | 20 |
| Alprazolam | Alprazolam | 68 | 18 |
| Famotidine | Famotidine | 61 | 17 |
| Eszopiclone | Eszopiclone | 56 | suppressed |
| Pravastatin Sodium | Pravastatin Sodium | 56 | 16 |
| Nitrofurantoin Mono-Macro | Nitrofurantoin Monohyd/M-Cryst | 54 | 38 |
| Metformin Hcl Er | Metformin Hcl | 52 | 14 |
| Valsartan-Hydrochlorothiazide | Valsartan/Hydrochlorothiazide | 52 | 14 |
| Estradiol (Twice Weekly) | Estradiol | 51 | 19 |
| Ramipril | Ramipril | 51 | 13 |
| Mirtazapine | Mirtazapine | 47 | 14 |
| Zolpidem Tartrate | Zolpidem Tartrate | 44 | 12 |
| Spironolactone | Spironolactone | 41 | suppressed |
| Dotti | Estradiol | 37 | 11 |
| Azithromycin | Azithromycin | 36 | 30 |
| Lisinopril | Lisinopril | 36 | suppressed |
| Bupropion Xl | Bupropion Hcl | 35 | suppressed |
| Olmesartan Medoxomil | Olmesartan Medoxomil | 35 | 11 |
| Colestipol Hcl | Colestipol Hcl | 31 | suppressed |
| Eliquis | Apixaban | 31 | suppressed |
| Hydrochlorothiazide | Hydrochlorothiazide | 31 | 11 |
| Lovastatin | Lovastatin | 31 | suppressed |
| Valacyclovir | Valacyclovir Hcl | 31 | 18 |
| Fluoxetine Hcl | Fluoxetine Hcl | 30 | suppressed |
| Nebivolol Hcl | Nebivolol Hcl | 30 | suppressed |
| Omeprazole | Omeprazole | 29 | suppressed |
| Gabapentin | Gabapentin | 28 | 12 |
| Ipratropium Bromide | Ipratropium Bromide | 28 | 15 |
| Paxlovid | Nirmatrelvir/Ritonavir | 28 | 28 |
| Progesterone | Progesterone, Micronized | 28 | suppressed |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 27 | suppressed |
| Pramipexole Dihydrochloride | Pramipexole Di-Hcl | 26 | suppressed |
| Duloxetine Hcl | Duloxetine Hcl | 25 | suppressed |
| Montelukast Sodium | Montelukast Sodium | 24 | suppressed |
| Sumatriptan Succinate | Sumatriptan Succinate | 24 | suppressed |
| Triamterene-Hydrochlorothiazid | Triamterene/Hydrochlorothiazid | 24 | suppressed |
| Cefuroxime | Cefuroxime Axetil | 23 | 19 |
| Estradiol | Estradiol | 23 | suppressed |
| Linzess | Linaclotide | 23 | suppressed |
| Diovan | Valsartan | 21 | suppressed |
| Lorazepam | Lorazepam | 20 | suppressed |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 19 | 12 |
| Furosemide | Furosemide | 19 | suppressed |
| Tramadol Hcl | Tramadol Hcl | 18 | suppressed |
| Atenolol | Atenolol | 17 | suppressed |
| Diphenoxylate-Atropine | Diphenoxylate Hcl/Atropine | 17 | suppressed |
| Prednisone | Prednisone | 17 | suppressed |
| Amlodipine-Valsartan | Amlodipine Besylate/Valsartan | 15 | suppressed |
| Felodipine Er | Felodipine | 15 | suppressed |
| Entresto | Sacubitril/Valsartan | 14 | suppressed |
| Imvexxy | Estradiol | 14 | suppressed |
| Potassium Chloride | Potassium Chloride | 14 | suppressed |
| Amitriptyline Hcl | Amitriptyline Hcl | 13 | suppressed |
| Bupropion Hcl Sr | Bupropion Hcl | 13 | suppressed |
| Cephalexin | Cephalexin | 13 | 11 |
| Citalopram Hbr | Citalopram Hydrobromide | 13 | suppressed |
| Irbesartan | Irbesartan | 13 | suppressed |
| Losartan-Hydrochlorothiazide | Losartan/Hydrochlorothiazide | 13 | suppressed |
| Sertraline Hcl | Sertraline Hcl | 13 | suppressed |
| Tacrolimus | Tacrolimus | 13 | suppressed |
| Tamsulosin Hcl | Tamsulosin Hcl | 13 | suppressed |
| Trulance | Plecanatide | 13 | suppressed |
| Xarelto | Rivaroxaban | 13 | suppressed |
| Testosterone | Testosterone | 12 | suppressed |
| Acetaminophen-Codeine | Acetaminophen With Codeine | 11 | suppressed |
| Breyna | Budesonide/Formoterol Fumarate | 11 | suppressed |
| Clonazepam | Clonazepam | 11 | suppressed |
| Digoxin | Digoxin | 11 | suppressed |
| Diltiazem 24hr Er (Cd) | Diltiazem Hcl | 11 | suppressed |
| Farxiga | Dapagliflozin Propanediol | 11 | suppressed |
| Metformin Hcl | Metformin Hcl | 11 | suppressed |
| Wixela Inhub | Fluticasone Propion/Salmeterol | 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 | $47.26 · 3 records | Salix Pharmaceuticals, a division of Bausch Health US, LLC | The Cologuard Plus Collection Kit, XIFAXAN | 1 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- How do you evaluate evidence when you have a financial relationship with Salix Pharmaceuticals, a division of Bausch Health US, LLC?
- 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