Payment overview · 2025
General Payments
$414.83
17 reported records · 4 companies
Healthcare provider profile · identity verified
Patrick Chang, MD
Allopathic & Osteopathic Physicians|Family Medicine · GRAND BLANC, MI · NPI 1912009705
Verified facts
What the public records show
CMS Open Payments records show Patrick Chang, MD received $414.83 in general payments during 2025 across 17 reported records.
AstraZeneca Pharmaceuticals LP accounted for 77.1% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 6 associated products.
AstraZeneca Pharmaceuticals LP reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported FARXIGA as an associated drug or biological on 106133 records involving 42906 distinct recipient NPIs. Public Medicare Part D data also shows 32 claims for Farxiga 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 |
|---|---|---|---|---|---|
| AstraZeneca Pharmaceuticals LP | Unresolved — no canonical attribution shown | $319.83 | 77.1% | 12 | 2025 |
| Boston Scientific Corporation | Unresolved — no canonical attribution shown | $44.49 | 10.7% | 2 | 2025 |
| Amgen Inc. | Unresolved — no canonical attribution shown | $28.73 | 6.9% | 2 | 2025 |
| Exact Sciences Corporation | Unresolved — no canonical attribution shown | $21.78 | 5.2% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $414.83 | 17 |
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 |
|---|---|---|---|---|---|
| BREZTRI Normalized: breztri |
Drug | AstraZeneca Pharmaceuticals LP | $213.87 | 6 | 2025 |
Source payment records
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| AIRSUPRA Normalized: airsupra |
Drug | AstraZeneca Pharmaceuticals LP | $170.47 | 7 | 2025 |
Source payment records
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| Varithena Administration Pack Normalized: varithena administration pack |
Device | Boston Scientific Corporation | $44.49 | 2 | 2025 |
Source payment records
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| OTEZLA Normalized: otezla |
Drug | Amgen Inc. | $28.73 | 2 | 2025 |
Source payment records
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| REPATHA Normalized: repatha |
Biological | Amgen Inc. | $28.73 | 2 | 2025 |
Source payment records
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| Cologuard Collection Kit Normalized: cologuard collection kit |
Device | Exact Sciences Corporation | $21.78 | 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 |
|---|---|---|---|---|---|---|
| AstraZeneca Pharmaceuticals LP Exact reporting entity; no affiliate inference |
2025 | FARXIGA open payments reported associated product |
CMS Open Payments — General Payments 106133 supporting records · 42906 recipient NPIs · example record 1206131362 |
Farxiga · 2024 Exact normalized brand match · 1 Part D row |
32 | 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 |
|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 281 | 76 |
| Buprenorphine-Naloxone | Buprenorphine Hcl/Naloxone Hcl | 266 | 29 |
| Amlodipine Besylate | Amlodipine Besylate | 241 | 62 |
| Lisinopril | Lisinopril | 214 | 54 |
| Losartan-Hydrochlorothiazide | Losartan/Hydrochlorothiazide | 199 | 54 |
| Simvastatin | Simvastatin | 163 | 41 |
| Omeprazole | Omeprazole | 157 | 43 |
| Losartan Potassium | Losartan Potassium | 156 | 56 |
| Metformin Hcl | Metformin Hcl | 151 | 39 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 148 | 33 |
| Hydrochlorothiazide | Hydrochlorothiazide | 142 | 44 |
| Zolpidem Tartrate | Zolpidem Tartrate | 129 | 20 |
| Levothyroxine Sodium | Levothyroxine Sodium | 119 | 31 |
| Tamsulosin Hcl | Tamsulosin Hcl | 110 | 35 |
| Naproxen | Naproxen | 107 | 36 |
| Gabapentin | Gabapentin | 93 | 21 |
| Ibuprofen | Ibuprofen | 90 | 34 |
| Lisinopril-Hydrochlorothiazide | Lisinopril/Hydrochlorothiazide | 86 | 23 |
| Metoprolol Tartrate | Metoprolol Tartrate | 69 | 20 |
| Quetiapine Fumarate | Quetiapine Fumarate | 69 | 11 |
| Trazodone Hcl | Trazodone Hcl | 68 | 19 |
| Triamcinolone Acetonide | Triamcinolone Acetonide | 58 | 36 |
| Sertraline Hcl | Sertraline Hcl | 57 | suppressed |
| Azelastine Hcl | Azelastine Hcl | 55 | 18 |
| Montelukast Sodium | Montelukast Sodium | 55 | 15 |
| Jardiance | Empagliflozin | 52 | 11 |
| Metoprolol Succinate | Metoprolol Succinate | 51 | 17 |
| Clonidine Hcl | Clonidine Hcl | 48 | suppressed |
| Cyclobenzaprine Hcl | Cyclobenzaprine Hcl | 47 | 12 |
| Methylprednisolone | Methylprednisolone | 45 | 34 |
| Pregabalin | Pregabalin | 45 | 12 |
| Carvedilol | Carvedilol | 43 | 11 |
| Tramadol Hcl | Tramadol Hcl | 40 | suppressed |
| Venlafaxine Hcl Er | Venlafaxine Hcl | 39 | suppressed |
| Azithromycin | Azithromycin | 38 | 25 |
| Duloxetine Hcl | Duloxetine Hcl | 38 | 12 |
| Alendronate Sodium | Alendronate Sodium | 37 | 15 |
| Calcitriol | Calcitriol | 37 | 15 |
| Eliquis | Apixaban | 37 | suppressed |
| Furosemide | Furosemide | 37 | 17 |
| Ondansetron Hcl | Ondansetron Hcl | 37 | suppressed |
| Lantus Solostar | Insulin Glargine,hum.Rec.Anlog | 34 | suppressed |
| Oxybutynin Chloride | Oxybutynin Chloride | 34 | suppressed |
| Prednisone | Prednisone | 34 | 16 |
| Atenolol | Atenolol | 33 | 12 |
| Tizanidine Hcl | Tizanidine Hcl | 33 | 16 |
| Farxiga | Dapagliflozin Propanediol | 32 | suppressed |
| Amoxicillin | Amoxicillin | 31 | 24 |
| Januvia | Sitagliptin Phosphate | 31 | suppressed |
| Clopidogrel | Clopidogrel Bisulfate | 30 | suppressed |
| Famotidine | Famotidine | 30 | 13 |
| Fluticasone Propionate | Fluticasone Propionate | 30 | 12 |
| Promethazine Hcl | Promethazine Hcl | 30 | 11 |
| Glipizide | Glipizide | 29 | suppressed |
| Amitriptyline Hcl | Amitriptyline Hcl | 28 | suppressed |
| Clonazepam | Clonazepam | 28 | suppressed |
| Ventolin Hfa | Albuterol Sulfate | 28 | suppressed |
| Trelegy Ellipta | Fluticasone/Umeclidin/Vilanter | 27 | suppressed |
| Finasteride | Finasteride | 26 | suppressed |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 26 | suppressed |
| Meloxicam | Meloxicam | 26 | 11 |
| Nifedipine Er | Nifedipine | 26 | suppressed |
| Buspirone Hcl | Buspirone Hcl | 25 | suppressed |
| Suboxone | Buprenorphine Hcl/Naloxone Hcl | 24 | suppressed |
| Pantoprazole Sodium | Pantoprazole Sodium | 23 | suppressed |
| Bupropion Xl | Bupropion Hcl | 22 | suppressed |
| Diclofenac Sodium | Diclofenac Sodium | 21 | suppressed |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 21 | suppressed |
| Temazepam | Temazepam | 21 | suppressed |
| Citalopram Hbr | Citalopram Hydrobromide | 20 | suppressed |
| Oxybutynin Chloride Er | Oxybutynin Chloride | 20 | suppressed |
| Bisoprolol-Hydrochlorothiazide | Bisoprolol/Hydrochlorothiazide | 19 | suppressed |
| Divalproex Sodium | Divalproex Sodium | 19 | suppressed |
| Ketoconazole | Ketoconazole | 18 | suppressed |
| Sumatriptan Succinate | Sumatriptan Succinate | 18 | suppressed |
| Testosterone Cypionate | Testosterone Cypionate | 18 | suppressed |
| Ezetimibe | Ezetimibe | 17 | suppressed |
| Hydroxyzine Hcl | Hydroxyzine Hcl | 17 | suppressed |
| Omega-3 Acid Ethyl Esters | Omega-3 Acid Ethyl Esters | 17 | suppressed |
| Risperidone | Risperidone | 17 | suppressed |
| Ropinirole Hcl | Ropinirole Hcl | 17 | suppressed |
| Alprazolam | Alprazolam | 16 | suppressed |
| Dextroamphetamine-Amphetamine | Dextroamphetamine/Amphetamine | 16 | suppressed |
| Diazepam | Diazepam | 16 | suppressed |
| Jantoven | Warfarin Sodium | 16 | suppressed |
| Memantine Hcl | Memantine Hcl | 16 | suppressed |
| Methadone Hcl | Methadone Hcl | 16 | suppressed |
| Pravastatin Sodium | Pravastatin Sodium | 16 | suppressed |
| Nitroglycerin | Nitroglycerin | 15 | suppressed |
| Ultra-Fine Mini Pen Needle | Pen Needle, Diabetic | 15 | suppressed |
| Hydrocortisone | Hydrocortisone | 14 | suppressed |
| Lamotrigine | Lamotrigine | 14 | suppressed |
| Meclizine Hcl | Meclizine Hcl | 14 | suppressed |
| Potassium Chloride | Potassium Chloride | 14 | suppressed |
| Valacyclovir | Valacyclovir Hcl | 14 | suppressed |
| Doxepin Hcl | Doxepin Hcl | 13 | suppressed |
| Haloperidol | Haloperidol | 13 | suppressed |
| Hydroxychloroquine Sulfate | Hydroxychloroquine Sulfate | 13 | suppressed |
| Lantus | Insulin Glargine,hum.Rec.Anlog | 13 | suppressed |
| Metformin Hcl Er | Metformin Hcl | 13 | suppressed |
| Testosterone | Testosterone | 13 | suppressed |
| Zubsolv | Buprenorphine Hcl/Naloxone Hcl | 13 | suppressed |
| Amlodipine Besylate-Benazepril | Amlodipine Besylate/Benazepril | 12 | suppressed |
| Dicyclomine Hcl | Dicyclomine Hcl | 12 | suppressed |
| Fenofibrate | Fenofibrate Nanocrystallized | 12 | suppressed |
| Fluoxetine Hcl | Fluoxetine Hcl | 12 | suppressed |
| Mirtazapine | Mirtazapine | 12 | suppressed |
| Novolin R | Insulin Regular, Human | 12 | suppressed |
| Ondansetron Odt | Ondansetron | 12 | suppressed |
| Prempro | Estrogen,con/M-Progest Acet | 12 | suppressed |
| Terbinafine Hcl | Terbinafine Hcl | 12 | suppressed |
| Valsartan-Hydrochlorothiazide | Valsartan/Hydrochlorothiazide | 12 | suppressed |
| Acarbose | Acarbose | 11 | suppressed |
| Autoshield Duo Pen Needle | Pen Needle,dual Safety,diabetc | 11 | suppressed |
| Breztri Aerosphere | Budesonide/Glycopyr/Formoterol | 11 | suppressed |
| Cephalexin | Cephalexin | 11 | suppressed |
| Cilostazol | Cilostazol | 11 | suppressed |
| Clotrimazole-Betamethasone | Clotrimazole/Betamethasone Dip | 11 | suppressed |
| Lorazepam | Lorazepam | 11 | suppressed |
| Terazosin Hcl | Terazosin Hcl | 11 | suppressed |
| Warfarin Sodium | Warfarin Sodium | 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 | $414.83 · 17 records | AstraZeneca Pharmaceuticals LP | AIRSUPRA, BREZTRI, Cologuard Collection Kit, OTEZLA, REPATHA, Varithena Administration Pack | 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 AstraZeneca Pharmaceuticals LP?
- 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