Payment overview · 2025
General Payments
$2,921.09
118 reported records · 21 companies
Healthcare provider profile · identity verified
Elbert Kc Chang, MD
Allopathic & Osteopathic Physicians|Internal Medicine · MONTCLAIR, CA · NPI 1053417808
Verified facts
What the public records show
CMS Open Payments records show Elbert Kc Chang, MD received $2,921.09 in general payments during 2025 across 118 reported records.
AstraZeneca Pharmaceuticals LP accounted for 19.7% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 27 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Eliquis, Nucala, Tezspire, Trelegy Ellipta.
Amgen 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 TEZSPIRE as an associated drug or biological on 22824 records involving 7320 distinct recipient NPIs. Public Medicare Part D data also shows 13 claims for Tezspire by this doctor in 2024.
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 SYMBICORT as an associated drug or biological on 71 records involving 51 distinct recipient NPIs. Public Medicare Part D data also shows 55 claims for Symbicort by this doctor in 2024.
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 TEZSPIRE as an associated drug or biological on 33983 records involving 10291 distinct recipient NPIs. Public Medicare Part D data also shows 13 claims for Tezspire by this doctor in 2024.
GlaxoSmithKline, 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 NUCALA as an associated drug or biological on 100127 records involving 16970 distinct recipient NPIs. Public Medicare Part D data also shows 13 claims for Nucala by this doctor in 2024.
GlaxoSmithKline, 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 TRELEGY ELLIPTA as an associated drug or biological on 131532 records involving 37148 distinct recipient NPIs. Public Medicare Part D data also shows 509 claims for Trelegy Ellipta by this doctor in 2024.
Merck Sharp & Dohme 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 Adempas as an associated drug or biological on 14 records involving 2 distinct recipient NPIs. Public Medicare Part D data also shows 50 claims for Adempas by this doctor in 2024.
PFIZER 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 ELIQUIS as an associated drug or biological on 87112 records involving 36032 distinct recipient NPIs. Public Medicare Part D data also shows 21 claims for Eliquis 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 | $574.30 | 19.7% | 21 | 2025 |
| Verona Pharma, Inc. | Unresolved — no canonical attribution shown | $525.46 | 18.0% | 17 | 2025 |
| GlaxoSmithKline, LLC. | Unresolved — no canonical attribution shown | $417.41 | 14.3% | 23 | 2025 |
| Merck Sharp & Dohme LLC | Unresolved — no canonical attribution shown | $227.13 | 7.8% | 9 | 2025 |
| GENZYME CORPORATION | Unresolved — no canonical attribution shown | $180.18 | 6.2% | 7 | 2025 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | Unresolved — no canonical attribution shown | $164.70 | 5.6% | 6 | 2025 |
| Insmed, Inc. | Unresolved — no canonical attribution shown | $148.20 | 5.1% | 8 | 2025 |
| Grifols USA, LLC | Unresolved — no canonical attribution shown | $127.09 | 4.3% | 5 | 2025 |
| Inspire Medical Systems, Inc. | Unresolved — no canonical attribution shown | $86.35 | 3.0% | 1 | 2025 |
| ANI Pharmaceuticals, Inc. | Unresolved — no canonical attribution shown | $68.15 | 2.3% | 2 | 2025 |
| Baxter Healthcare | Unresolved — no canonical attribution shown | $64.56 | 2.2% | 3 | 2025 |
| Lilly USA, LLC | Unresolved — no canonical attribution shown | $54.95 | 1.9% | 2 | 2025 |
| Viatris Specialty LLC | Unresolved — no canonical attribution shown | $53.34 | 1.8% | 3 | 2025 |
| United Therapeutics Corporation | Unresolved — no canonical attribution shown | $49.64 | 1.7% | 2 | 2025 |
| Actelion Pharmaceuticals US, Inc. | Unresolved — no canonical attribution shown | $48.23 | 1.6% | 2 | 2025 |
| Regeneron Healthcare Solutions, Inc. | Unresolved — no canonical attribution shown | $42.95 | 1.5% | 2 | 2025 |
| PFIZER INC. | Unresolved — no canonical attribution shown | $22.30 | 0.8% | 1 | 2025 |
| SANOFI-AVENTIS U.S. LLC | Unresolved — no canonical attribution shown | $20.23 | 0.7% | 1 | 2025 |
| Dexcom, Inc. | Unresolved — no canonical attribution shown | $16.34 | 0.6% | 1 | 2025 |
| Amgen Inc. | Unresolved — no canonical attribution shown | $15.87 | 0.5% | 1 | 2025 |
| ABBVIE INC. | Unresolved — no canonical attribution shown | $13.71 | 0.5% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $2,921.09 | 118 |
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 |
|---|---|---|---|---|---|
| Ohtuvayre Normalized: ohtuvayre |
Drug | Verona Pharma, Inc. | $525.46 | 17 | 2025 |
Source payment records
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| NUCALA Normalized: nucala |
Biological | GlaxoSmithKline, LLC. | $273.70 | 15 | 2025 |
Source payment records
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| FASENRA Normalized: fasenra |
Biological | AstraZeneca Pharmaceuticals LP | $268.69 | 10 | 2025 |
Source payment records
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| DUPIXENT Normalized: dupixent |
Biological | GENZYME CORPORATION, Regeneron Healthcare Solutions, Inc. | $223.13 | 9 | 2025 |
Source payment records
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| AIRSUPRA Normalized: airsupra |
Drug | AstraZeneca Pharmaceuticals LP | $222.77 | 3 | 2025 |
Source payment records
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| TEZSPIRE Normalized: tezspire |
Biological | Amgen Inc., AstraZeneca Pharmaceuticals LP | $213.03 | 8 | 2025 |
Source payment records
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| WINREVAIR Normalized: winrevair |
Biological | Merck Sharp & Dohme LLC | $204.48 | 8 | 2025 |
Source payment records
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| Arikayce Normalized: arikayce |
Drug | Insmed, Inc. | $148.20 | 8 | 2025 |
Source payment records
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| TRELEGY ELLIPTA Normalized: trelegy ellipta |
Drug | GlaxoSmithKline, LLC. | $143.71 | 8 | 2025 |
Source payment records
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| Prolastin-C Liquid Normalized: prolastin c liquid |
Biological | Grifols USA, LLC | $127.09 | 5 | 2025 |
Source payment records
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| BREZTRI Normalized: breztri |
Drug | AstraZeneca Pharmaceuticals LP | $122.83 | 4 | 2025 |
Source payment records
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| OFEV Normalized: ofev |
Drug | Boehringer Ingelheim Pharmaceuticals, Inc. | $88.95 | 3 | 2025 |
Source payment records
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| INSPIRE Normalized: inspire |
Device | Inspire Medical Systems, Inc. | $86.35 | 1 | 2025 |
Source payment records
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| JASCAYD Normalized: jascayd |
Drug | Boehringer Ingelheim Pharmaceuticals, Inc. | $75.75 | 3 | 2025 |
Source payment records
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| PURIFIED CORTROPHIN GEL Normalized: purified cortrophin gel |
Drug | ANI Pharmaceuticals, Inc. | $68.15 | 2 | 2025 |
Source payment records
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| Brinsupri Normalized: brinsupri |
Drug | Insmed, Inc. | $62.25 | 3 | 2025 |
Source payment records
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| ZEPBOUND Normalized: zepbound |
Drug | Lilly USA, LLC | $54.95 | 2 | 2025 |
Source payment records
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| YUPELRI Normalized: yupelri |
Drug | Viatris Specialty LLC | $53.34 | 3 | 2025 |
Source payment records
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| Tyvaso Normalized: tyvaso |
Drug | United Therapeutics Corporation | $49.64 | 2 | 2025 |
Source payment records
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| UPTRAVI Normalized: uptravi |
Drug | Actelion Pharmaceuticals US, Inc. | $48.23 | 2 | 2025 |
Source payment records
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| Hillrom - Volara System Normalized: hillrom volara system |
Device | Baxter Healthcare | $41.09 | 2 | 2025 |
Source payment records
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| Hillrom - Monarch Airway Clearance System Normalized: hillrom monarch airway clearance system |
Device | Baxter Healthcare | $23.47 | 1 | 2025 |
Source payment records
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| ZERBAXA Normalized: zerbaxa |
Drug | Merck Sharp & Dohme LLC | $22.65 | 1 | 2025 |
Source payment records
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| ELIQUIS Normalized: eliquis |
Drug | PFIZER INC. | $22.30 | 1 | 2025 |
Source payment records
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| TZIELD Normalized: tzield |
Biological | SANOFI-AVENTIS U.S. LLC | $20.23 | 1 | 2025 |
Source payment records
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| Dexcom G6 Transmitter Normalized: dexcom g6 transmitter |
Medical Supply | Dexcom, Inc. | $16.34 | 1 | 2025 |
Source payment records
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| AVYCAZ Normalized: avycaz |
Drug | ABBVIE INC. | $13.71 | 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
| Open Payments product | Payment year | Part D brand | Part D year | Claims | Match method | Source |
|---|---|---|---|---|---|---|
| ELIQUIS eliquis |
2025 | Eliquis | 2024 | 21 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| NUCALA nucala |
2025 | Nucala | 2024 | 13 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| TEZSPIRE tezspire |
2025 | Tezspire | 2024 | 13 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| TRELEGY ELLIPTA trelegy ellipta |
2025 | Trelegy Ellipta | 2024 | 509 | 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 |
|---|---|---|---|---|---|---|
| Amgen Inc. Exact reporting entity; no affiliate inference |
2025 | TEZSPIRE open payments reported associated product |
CMS Open Payments — General Payments 22824 supporting records · 7320 recipient NPIs · example record 1226871881 |
Tezspire · 2024 Exact normalized brand match · 1 Part D row |
13 | suppressed by CMS |
| AstraZeneca Pharmaceuticals LP Exact reporting entity; no affiliate inference |
2025 | SYMBICORT open payments reported associated product |
CMS Open Payments — General Payments 71 supporting records · 51 recipient NPIs · example record 1206132610 |
Symbicort · 2024 Exact normalized brand match · 1 Part D row |
55 | 15 |
| AstraZeneca Pharmaceuticals LP Exact reporting entity; no affiliate inference |
2025 | TEZSPIRE open payments reported associated product |
CMS Open Payments — General Payments 33983 supporting records · 10291 recipient NPIs · example record 1206131392 |
Tezspire · 2024 Exact normalized brand match · 1 Part D row |
13 | suppressed by CMS |
| GlaxoSmithKline, LLC. Exact reporting entity; no affiliate inference |
2025 | NUCALA open payments reported associated product |
CMS Open Payments — General Payments 100127 supporting records · 16970 recipient NPIs · example record 1190332378 |
Nucala · 2024 Exact normalized brand match · 1 Part D row |
13 | suppressed by CMS |
| GlaxoSmithKline, LLC. Exact reporting entity; no affiliate inference |
2025 | TRELEGY ELLIPTA open payments reported associated product |
CMS Open Payments — General Payments 131532 supporting records · 37148 recipient NPIs · example record 1190332369 |
Trelegy Ellipta · 2024 Exact normalized brand match · 1 Part D row |
509 | 103 |
| Merck Sharp & Dohme LLC Exact reporting entity; no affiliate inference |
2025 | Adempas open payments reported associated product |
CMS Open Payments — General Payments 14 supporting records · 2 recipient NPIs · example record 1237996458 |
Adempas · 2024 Exact normalized brand match · 1 Part D row |
50 | suppressed by CMS |
| PFIZER INC. Exact reporting entity; no affiliate inference |
2025 | ELIQUIS open payments reported associated product |
CMS Open Payments — General Payments 87112 supporting records · 36032 recipient NPIs · example record 1228794063 |
Eliquis · 2024 Exact normalized brand match · 1 Part D row |
21 | 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 |
|---|---|---|---|
| Trelegy Ellipta | Fluticasone/Umeclidin/Vilanter | 509 | 103 |
| Montelukast Sodium | Montelukast Sodium | 488 | 131 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 408 | 145 |
| Prednisone | Prednisone | 298 | 163 |
| Azithromycin | Azithromycin | 209 | 137 |
| Fluticasone Propionate | Fluticasone Propionate | 118 | 51 |
| Breo Ellipta | Fluticasone/Vilanterol | 114 | 31 |
| Fluticasone-Salmeterol | Fluticasone Propion/Salmeterol | 108 | 36 |
| Anoro Ellipta | Umeclidinium Brm/Vilanterol Tr | 85 | 19 |
| Wixela Inhub | Fluticasone Propion/Salmeterol | 84 | 26 |
| Breztri Aerosphere | Budesonide/Glycopyr/Formoterol | 80 | 13 |
| Spiriva Respimat | Tiotropium Bromide | 64 | 14 |
| Symbicort | Budesonide/Formoterol Fumarate | 55 | 15 |
| Doxycycline Hyclate | Doxycycline Hyclate | 54 | 34 |
| Adempas | Riociguat | 50 | suppressed |
| Roflumilast | Roflumilast | 50 | suppressed |
| Levofloxacin | Levofloxacin | 40 | 26 |
| Pantoprazole Sodium | Pantoprazole Sodium | 40 | 14 |
| Amlodipine Besylate | Amlodipine Besylate | 37 | 13 |
| Combivent Respimat | Ipratropium/Albuterol Sulfate | 27 | suppressed |
| Sildenafil Citrate | Sildenafil Citrate | 27 | suppressed |
| Levalbuterol Tartrate Hfa | Levalbuterol Tartrate | 26 | suppressed |
| Stiolto Respimat | Tiotropium Br/Olodaterol Hcl | 26 | suppressed |
| Orenitram Er | Treprostinil Diolamine | 24 | suppressed |
| Advair Hfa | Fluticasone Propion/Salmeterol | 22 | suppressed |
| Ambrisentan | Ambrisentan | 22 | suppressed |
| Arnuity Ellipta | Fluticasone Furoate | 22 | suppressed |
| Furosemide | Furosemide | 22 | suppressed |
| Eliquis | Apixaban | 21 | suppressed |
| Dupixent Syringe | Dupilumab | 20 | suppressed |
| Qvar Redihaler | Beclomethasone Dipropionate | 20 | suppressed |
| Metoprolol Tartrate | Metoprolol Tartrate | 19 | suppressed |
| Gabapentin | Gabapentin | 16 | suppressed |
| Letairis | Ambrisentan | 16 | suppressed |
| Zolpidem Tartrate | Zolpidem Tartrate | 16 | suppressed |
| Lamotrigine | Lamotrigine | 15 | suppressed |
| Potassium Chloride | Potassium Chloride | 15 | suppressed |
| Budesonide-Formoterol Fumarate | Budesonide/Formoterol Fumarate | 13 | suppressed |
| Nucala | Mepolizumab | 13 | suppressed |
| Tezspire | Tezepelumab-Ekko | 13 | suppressed |
| Folic Acid | Folic Acid | 12 | suppressed |
| Metformin Hcl | Metformin Hcl | 12 | suppressed |
| Modafinil | Modafinil | 12 | suppressed |
| Xarelto | Rivaroxaban | 12 | suppressed |
| Breyna | Budesonide/Formoterol Fumarate | 11 | suppressed |
| Isoniazid | Isoniazid | 11 | suppressed |
| Januvia | Sitagliptin Phosphate | 11 | suppressed |
| Pirfenidone | Pirfenidone | 11 | suppressed |
| Rifampin | Rifampin | 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 | $2,921.09 · 118 records | AstraZeneca Pharmaceuticals LP | AIRSUPRA, AVYCAZ, Arikayce, BREZTRI, Brinsupri, DUPIXENT, Dexcom G6 Transmitter, ELIQUIS, FASENRA, Hillrom - Monarch Airway Clearance System, Hillrom - Volara System, INSPIRE, JASCAYD, NUCALA, OFEV, Ohtuvayre, PURIFIED CORTROPHIN GEL, Prolastin-C Liquid, TEZSPIRE, TRELEGY ELLIPTA, TZIELD, Tyvaso, UPTRAVI, WINREVAIR, YUPELRI, ZEPBOUND, ZERBAXA | 7 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- What role, if any, does Eliquis play in your treatment recommendations for me?
- How do you evaluate evidence when you have a financial relationship with Amgen 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