Payment overview · 2025
General Payments
$113.05
1 reported records · 1 companies
Healthcare provider profile · identity verified
Issa Shammas, MD
Allopathic & Osteopathic Physicians|Internal Medicine · INDIANAPOLIS, IN · NPI 1073554424
Verified facts
What the public records show
CMS Open Payments records show Issa Shammas, MD received $113.05 in general payments during 2025 across 1 reported records.
Phathom Pharmaceuticals, Inc. accounted for 100.0% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 1 associated product.
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 |
|---|---|---|---|---|---|
| Phathom Pharmaceuticals, Inc. | Unresolved — no canonical attribution shown | $113.05 | 100.0% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $113.05 | 1 |
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 |
|---|---|---|---|---|---|
| VOQUEZNA Normalized: voquezna |
Drug | Phathom Pharmaceuticals, Inc. | $113.05 | 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 | 596 | 171 |
| Amlodipine Besylate | Amlodipine Besylate | 539 | 158 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 265 | 80 |
| Losartan Potassium | Losartan Potassium | 230 | 69 |
| Levothyroxine Sodium | Levothyroxine Sodium | 206 | 60 |
| Lisinopril | Lisinopril | 193 | 50 |
| Metformin Hcl Er | Metformin Hcl | 184 | 63 |
| Pravastatin Sodium | Pravastatin Sodium | 174 | 54 |
| Metformin Hcl | Metformin Hcl | 165 | 48 |
| Fluticasone Propionate | Fluticasone Propionate | 157 | 67 |
| Omeprazole | Omeprazole | 154 | 40 |
| Pantoprazole Sodium | Pantoprazole Sodium | 138 | 41 |
| Simvastatin | Simvastatin | 136 | 38 |
| Gabapentin | Gabapentin | 130 | 36 |
| Metoprolol Succinate | Metoprolol Succinate | 117 | 38 |
| Sertraline Hcl | Sertraline Hcl | 114 | 31 |
| Hydrochlorothiazide | Hydrochlorothiazide | 113 | 31 |
| Mounjaro | Tirzepatide | 112 | 26 |
| Alprazolam | Alprazolam | 94 | 19 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 91 | 34 |
| Furosemide | Furosemide | 84 | 26 |
| Potassium Chloride | Potassium Chloride | 83 | 22 |
| Trazodone Hcl | Trazodone Hcl | 83 | 27 |
| Tizanidine Hcl | Tizanidine Hcl | 76 | 29 |
| Lisinopril-Hydrochlorothiazide | Lisinopril/Hydrochlorothiazide | 75 | 20 |
| Tamsulosin Hcl | Tamsulosin Hcl | 70 | 21 |
| Clopidogrel | Clopidogrel Bisulfate | 69 | 20 |
| Carvedilol | Carvedilol | 66 | 19 |
| Nifedipine Er | Nifedipine | 66 | 16 |
| Jardiance | Empagliflozin | 63 | 17 |
| Ozempic | Semaglutide | 63 | 22 |
| Escitalopram Oxalate | Escitalopram Oxalate | 62 | 19 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 60 | 17 |
| Allopurinol | Allopurinol | 59 | 19 |
| Atenolol | Atenolol | 57 | 16 |
| Eliquis | Apixaban | 57 | 14 |
| Metoprolol Tartrate | Metoprolol Tartrate | 57 | 16 |
| Tramadol Hcl | Tramadol Hcl | 57 | suppressed |
| Ezetimibe | Ezetimibe | 50 | 14 |
| Famotidine | Famotidine | 48 | 16 |
| Buspirone Hcl | Buspirone Hcl | 47 | 15 |
| Trulicity | Dulaglutide | 45 | suppressed |
| Doxycycline Monohydrate | Doxycycline Monohydrate | 44 | 40 |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 43 | 36 |
| Pioglitazone Hcl | Pioglitazone Hcl | 43 | 13 |
| Valsartan-Hydrochlorothiazide | Valsartan/Hydrochlorothiazide | 43 | 11 |
| Synthroid | Levothyroxine Sodium | 41 | suppressed |
| Amoxicillin | Amoxicillin | 38 | 33 |
| Chlorthalidone | Chlorthalidone | 38 | 12 |
| Zolpidem Tartrate | Zolpidem Tartrate | 38 | suppressed |
| Triamterene-Hydrochlorothiazid | Triamterene/Hydrochlorothiazid | 37 | 12 |
| Irbesartan | Irbesartan | 36 | suppressed |
| Cyclobenzaprine Hcl | Cyclobenzaprine Hcl | 35 | suppressed |
| Alendronate Sodium | Alendronate Sodium | 34 | suppressed |
| Losartan-Hydrochlorothiazide | Losartan/Hydrochlorothiazide | 34 | suppressed |
| Farxiga | Dapagliflozin Propanediol | 33 | suppressed |
| Fluoxetine Hcl | Fluoxetine Hcl | 32 | suppressed |
| Citalopram Hbr | Citalopram Hydrobromide | 31 | suppressed |
| Hydrocortisone | Hydrocortisone | 31 | 13 |
| Cephalexin | Cephalexin | 30 | 27 |
| Dropsafe Prep Pads | Alcohol Antiseptic Pads | 30 | suppressed |
| Felodipine Er | Felodipine | 30 | 11 |
| Lansoprazole | Lansoprazole | 30 | suppressed |
| Doxazosin Mesylate | Doxazosin Mesylate | 28 | suppressed |
| Repatha Sureclick | Evolocumab | 28 | suppressed |
| Spironolactone | Spironolactone | 26 | suppressed |
| Januvia | Sitagliptin Phosphate | 25 | suppressed |
| Azithromycin | Azithromycin | 24 | 19 |
| Irbesartan-Hydrochlorothiazide | Irbesartan/Hydrochlorothiazide | 22 | suppressed |
| Ramipril | Ramipril | 22 | suppressed |
| Fluconazole | Fluconazole | 20 | 16 |
| Isosorbide Mononitrate Er | Isosorbide Mononitrate | 20 | suppressed |
| Midodrine Hcl | Midodrine Hcl | 20 | suppressed |
| Tresiba Flextouch U-200 | Insulin Degludec | 20 | suppressed |
| Venlafaxine Hcl Er | Venlafaxine Hcl | 20 | suppressed |
| Amitriptyline Hcl | Amitriptyline Hcl | 19 | suppressed |
| Methylprednisolone | Methylprednisolone | 19 | 18 |
| Nano 2nd Gen Pen Needle | Pen Needle, Diabetic | 19 | suppressed |
| Acyclovir | Acyclovir | 18 | suppressed |
| Clonidine Hcl | Clonidine Hcl | 18 | suppressed |
| Duloxetine Hcl | Duloxetine Hcl | 18 | suppressed |
| Esomeprazole Magnesium | Esomeprazole Magnesium | 18 | suppressed |
| Fenofibrate | Fenofibrate Nanocrystallized | 18 | suppressed |
| Ibuprofen | Ibuprofen | 18 | suppressed |
| Paroxetine Hcl | Paroxetine Hcl | 18 | suppressed |
| Valsartan | Valsartan | 18 | suppressed |
| Warfarin Sodium | Warfarin Sodium | 18 | suppressed |
| Diltiazem 24hr Er (Cd) | Diltiazem Hcl | 17 | suppressed |
| Hydralazine Hcl | Hydralazine Hcl | 17 | suppressed |
| Montelukast Sodium | Montelukast Sodium | 17 | suppressed |
| Amiodarone Hcl | Amiodarone Hcl | 16 | suppressed |
| Amlodipine Besylate-Benazepril | Amlodipine Besylate/Benazepril | 16 | suppressed |
| Glipizide Er | Glipizide | 16 | suppressed |
| Kerendia | Finerenone | 16 | suppressed |
| Cilostazol | Cilostazol | 15 | suppressed |
| Diclofenac Sodium | Diclofenac Sodium | 15 | suppressed |
| Lantus Solostar | Insulin Glargine,hum.Rec.Anlog | 15 | suppressed |
| Synjardy Xr | Empagliflozin/Metformin Hcl | 15 | suppressed |
| Valacyclovir | Valacyclovir Hcl | 15 | suppressed |
| Hydroxyzine Hcl | Hydroxyzine Hcl | 14 | suppressed |
| Prednisone | Prednisone | 14 | suppressed |
| Breo Ellipta | Fluticasone/Vilanterol | 13 | suppressed |
| Glipizide | Glipizide | 13 | suppressed |
| Ropinirole Hcl | Ropinirole Hcl | 13 | suppressed |
| Triamcinolone Acetonide | Triamcinolone Acetonide | 13 | suppressed |
| Benazepril Hcl | Benazepril Hcl | 12 | suppressed |
| Cefuroxime | Cefuroxime Axetil | 12 | suppressed |
| Fenofibrate | Fenofibrate | 12 | suppressed |
| Ondansetron Hcl | Ondansetron Hcl | 12 | suppressed |
| Wixela Inhub | Fluticasone Propion/Salmeterol | 12 | suppressed |
| Xigduo Xr | Dapaglifloz Propaned/Metformin | 12 | suppressed |
| Doxycycline Hyclate | Doxycycline Hyclate | 11 | 11 |
| Verapamil Er | Verapamil Hcl | 11 | suppressed |
| Zolpidem Tartrate Er | Zolpidem Tartrate | 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 | $113.05 · 1 records | Phathom Pharmaceuticals, Inc. | VOQUEZNA | — | — |
| 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