Payment overview · 2025
General Payments
3 reported records · 2 companies
Healthcare provider profile · identity verified
Allopathic & Osteopathic Physicians|Internal Medicine · CORPUS CHRISTI, TX · NPI 1669649596
Verified facts
CMS Open Payments records show Shahab Ahmad, DO received $310.87 in general payments during 2025 across 3 reported records.
ACADIA Pharmaceuticals Inc accounted for 58.2% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 2 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Nuplazid.
ACADIA Pharmaceuticals 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 NUPLAZID as an associated drug or biological on 20845 records involving 6448 distinct recipient NPIs. Public Medicare Part D data also shows 18 claims for Nuplazid by this doctor in 2024.
These records do not establish that a payment influenced prescribing or medical care.
Payment overview · 2025
3 reported records · 2 companies
Separate record types
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?
| Reported company | Canonical company | Amount | Share | Records | Year |
|---|---|---|---|---|---|
| ACADIA Pharmaceuticals Inc | Unresolved — no canonical attribution shown | $180.97 | 58.2% | 2 | 2025 |
| Teva Pharmaceuticals USA, Inc. | Unresolved — no canonical attribution shown | $129.90 | 41.8% | 1 | 2025 |
What were the payments for?
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $310.87 | 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
| Reported product | Type | Reported company | Related amount* | Records | Year |
|---|---|---|---|---|---|
| NUPLAZID Normalized: nuplazid |
Drug | ACADIA Pharmaceuticals Inc | $180.97 | 2 | 2025 |
Source payment records
|
|||||
| AUSTEDO XR Normalized: austedo xr |
Drug | Teva Pharmaceuticals USA, Inc. | $129.90 | 1 | 2025 |
Source payment records
|
|||||
* 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.
| Open Payments product | Payment year | Part D brand | Part D year | Claims | Match method | Source |
|---|---|---|---|---|---|---|
| NUPLAZID nuplazid |
2025 | Nuplazid | 2024 | 18 Beneficiary count suppressed |
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
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 |
|---|---|---|---|---|---|---|
| ACADIA Pharmaceuticals Inc Exact reporting entity; no affiliate inference |
2025 | NUPLAZID open payments reported associated product |
CMS Open Payments — General Payments 20845 supporting records · 6448 recipient NPIs · example record 1247763852 |
Nuplazid · 2024 Exact normalized brand match · 1 Part D row |
18 | 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
| Brand | Generic | Claims | Beneficiaries |
|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 1460 | 255 |
| Levothyroxine Sodium | Levothyroxine Sodium | 1436 | 193 |
| Donepezil Hcl | Donepezil Hcl | 1253 | 142 |
| Furosemide | Furosemide | 1215 | 191 |
| Amlodipine Besylate | Amlodipine Besylate | 1152 | 156 |
| Trazodone Hcl | Trazodone Hcl | 1116 | 131 |
| Memantine Hcl | Memantine Hcl | 981 | 97 |
| Gabapentin | Gabapentin | 959 | 147 |
| Potassium Chloride | Potassium Chloride | 875 | 129 |
| Eliquis | Apixaban | 838 | 101 |
| Pantoprazole Sodium | Pantoprazole Sodium | 809 | 160 |
| Sertraline Hcl | Sertraline Hcl | 793 | 87 |
| Metoprolol Tartrate | Metoprolol Tartrate | 743 | 126 |
| Tamsulosin Hcl | Tamsulosin Hcl | 739 | 98 |
| Lisinopril | Lisinopril | 729 | 112 |
| Divalproex Sodium | Divalproex Sodium | 669 | 74 |
| Clopidogrel | Clopidogrel Bisulfate | 616 | 96 |
| Metformin Hcl | Metformin Hcl | 589 | 86 |
| Levetiracetam | Levetiracetam | 500 | 55 |
| Tramadol Hcl | Tramadol Hcl | 482 | 133 |
| Buspirone Hcl | Buspirone Hcl | 430 | 55 |
| Escitalopram Oxalate | Escitalopram Oxalate | 428 | 60 |
| Mirtazapine | Mirtazapine | 417 | 74 |
| Losartan Potassium | Losartan Potassium | 414 | 64 |
| Fluoxetine Hcl | Fluoxetine Hcl | 376 | 41 |
| Acetaminophen-Codeine | Acetaminophen With Codeine | 364 | 94 |
| Citalopram Hbr | Citalopram Hydrobromide | 334 | 46 |
| Montelukast Sodium | Montelukast Sodium | 305 | 38 |
| Hydralazine Hcl | Hydralazine Hcl | 300 | 56 |
| Lorazepam | Lorazepam | 300 | 69 |
| Alprazolam | Alprazolam | 285 | 66 |
| Metoprolol Succinate | Metoprolol Succinate | 284 | 53 |
| Spironolactone | Spironolactone | 275 | 46 |
| Duloxetine Hcl | Duloxetine Hcl | 270 | 45 |
| Lactulose | Lactulose | 264 | 81 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 233 | 49 |
| Baclofen | Baclofen | 221 | 20 |
| Lantus Solostar | Insulin Glargine,hum.Rec.Anlog | 201 | 51 |
| Carbidopa-Levodopa | Carbidopa/Levodopa | 195 | 23 |
| Clonazepam | Clonazepam | 195 | 35 |
| Tradjenta | Linagliptin | 183 | 18 |
| Carvedilol | Carvedilol | 170 | 38 |
| Januvia | Sitagliptin Phosphate | 167 | 13 |
| Quetiapine Fumarate | Quetiapine Fumarate | 157 | 28 |
| Ondansetron Hcl | Ondansetron Hcl | 154 | 86 |
| Simvastatin | Simvastatin | 149 | 36 |
| Pregabalin | Pregabalin | 146 | 23 |
| Cyclobenzaprine Hcl | Cyclobenzaprine Hcl | 142 | 29 |
| Sevelamer Carbonate | Sevelamer Carbonate | 142 | 16 |
| Paroxetine Hcl | Paroxetine Hcl | 140 | 18 |
| Rivastigmine | Rivastigmine | 138 | suppressed |
| Amiodarone Hcl | Amiodarone Hcl | 136 | 23 |
| Midodrine Hcl | Midodrine Hcl | 133 | 38 |
| Ipratropium-Albuterol | Ipratropium/Albuterol Sulfate | 132 | 81 |
| Lantus | Insulin Glargine,hum.Rec.Anlog | 130 | 27 |
| Glipizide | Glipizide | 129 | 24 |
| Trulicity | Dulaglutide | 128 | 21 |
| Famotidine | Famotidine | 125 | 46 |
| Hydrochlorothiazide | Hydrochlorothiazide | 124 | 16 |
| Finasteride | Finasteride | 116 | 22 |
| Rivastigmine | Rivastigmine Tartrate | 114 | suppressed |
| Levemir Flexpen | Insulin Detemir | 112 | 27 |
| Latanoprost | Latanoprost | 110 | 34 |
| Phenytoin Sodium Extended | Phenytoin Sodium Extended | 110 | 11 |
| Alendronate Sodium | Alendronate Sodium | 107 | 20 |
| Allopurinol | Allopurinol | 103 | 18 |
| Ropinirole Hcl | Ropinirole Hcl | 102 | 13 |
| Levemir | Insulin Detemir | 101 | 26 |
| Myrbetriq | Mirabegron | 99 | suppressed |
| Temazepam | Temazepam | 98 | 22 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 96 | 26 |
| Azithromycin | Azithromycin | 95 | 81 |
| Hydroxyzine Hcl | Hydroxyzine Hcl | 95 | 34 |
| Oxybutynin Chloride | Oxybutynin Chloride | 89 | 15 |
| Triamcinolone Acetonide | Triamcinolone Acetonide | 89 | 37 |
| Doxycycline Hyclate | Doxycycline Hyclate | 83 | 65 |
| Glucagon Emergency Kit | Glucagon | 83 | 39 |
| Omeprazole | Omeprazole | 82 | 26 |
| Oxcarbazepine | Oxcarbazepine | 82 | suppressed |
| Nifedipine Er | Nifedipine | 80 | 11 |
| Isosorbide Mononitrate Er | Isosorbide Mononitrate | 79 | 13 |
| Megestrol Acetate | Megestrol Acetate | 79 | 33 |
| Toujeo Solostar | Insulin Glargine,hum.Rec.Anlog | 79 | 11 |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 77 | 59 |
| Meloxicam | Meloxicam | 77 | 13 |
| Cilostazol | Cilostazol | 75 | suppressed |
| Digoxin | Digoxin | 75 | 13 |
| Pravastatin Sodium | Pravastatin Sodium | 72 | 15 |
| Ciprofloxacin Hcl | Ciprofloxacin Hcl | 71 | 61 |
| Xarelto | Rivaroxaban | 71 | 14 |
| Sucralfate | Sucralfate | 70 | 25 |
| Lidocaine Hcl | Lidocaine Hcl | 68 | 54 |
| Lisinopril-Hydrochlorothiazide | Lisinopril/Hydrochlorothiazide | 68 | suppressed |
| Metformin Hcl Er | Metformin Hcl | 68 | 14 |
| Namzaric | Memantine Hcl/Donepezil Hcl | 67 | suppressed |
| Prednisone | Prednisone | 67 | 31 |
| Ceftriaxone | Ceftriaxone Sodium | 65 | 57 |
| Santyl | Collagenase Clostridium Hist. | 64 | 25 |
| Humalog Kwikpen U-100 | Insulin Lispro | 62 | 31 |
| Jardiance | Empagliflozin | 61 | 18 |
| Entresto | Sacubitril/Valsartan | 58 | suppressed |
| Propranolol Hcl | Propranolol Hcl | 58 | suppressed |
| Kapspargo Sprinkle | Metoprolol Succinate | 57 | 12 |
| Carbamazepine | Carbamazepine | 55 | suppressed |
| Lacosamide | Lacosamide | 55 | suppressed |
| Scopolamine | Scopolamine | 54 | suppressed |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 53 | 31 |
| Phenobarbital | Phenobarbital | 53 | suppressed |
| Risperidone | Risperidone | 53 | suppressed |
| Bupropion Hcl Sr | Bupropion Hcl | 52 | suppressed |
| Doxazosin Mesylate | Doxazosin Mesylate | 52 | suppressed |
| Fluticasone Propionate | Fluticasone Propionate | 51 | 23 |
| Albuterol Sulfate | Albuterol Sulfate | 50 | 30 |
| Bumetanide | Bumetanide | 50 | suppressed |
| Ezetimibe | Ezetimibe | 49 | 11 |
| Benztropine Mesylate | Benztropine Mesylate | 48 | suppressed |
| Clonidine | Clonidine | 48 | suppressed |
| Metoclopramide Hcl | Metoclopramide Hcl | 48 | 11 |
| Aripiprazole | Aripiprazole | 47 | suppressed |
| Diltiazem 24hr Er | Diltiazem Hcl | 46 | suppressed |
| Farxiga | Dapagliflozin Propanediol | 46 | 12 |
| Fenofibrate | Fenofibrate | 45 | suppressed |
| Budesonide | Budesonide | 44 | 27 |
| Humalog | Insulin Lispro | 42 | 17 |
| Methocarbamol | Methocarbamol | 42 | 26 |
| Oxybutynin Chloride Er | Oxybutynin Chloride | 42 | suppressed |
| Budesonide-Formoterol Fumarate | Budesonide/Formoterol Fumarate | 40 | 14 |
| Metolazone | Metolazone | 40 | 13 |
| Nystatin | Nystatin | 40 | 28 |
| Glimepiride | Glimepiride | 39 | suppressed |
| Tizanidine Hcl | Tizanidine Hcl | 39 | 15 |
| Dapagliflozin | Dapagliflozin Propanediol | 38 | 12 |
| Fenofibrate | Fenofibrate Nanocrystallized | 37 | suppressed |
| Venlafaxine Hcl | Venlafaxine Hcl | 37 | suppressed |
| Atenolol | Atenolol | 36 | suppressed |
| Divalproex Sodium Er | Divalproex Sodium | 36 | suppressed |
| Sulfamethoxazole-Trimethoprim | Sulfamethoxazole/Trimethoprim | 36 | 27 |
| Tresiba Flextouch U-100 | Insulin Degludec | 36 | suppressed |
| Diclofenac Sodium | Diclofenac Sodium | 35 | 13 |
| Diltiazem 24hr Er (Cd) | Diltiazem Hcl | 35 | suppressed |
| Lamotrigine | Lamotrigine | 35 | suppressed |
| Clonidine Hcl | Clonidine Hcl | 34 | 16 |
| Levocetirizine Dihydrochloride | Levocetirizine Dihydrochloride | 34 | suppressed |
| Levofloxacin | Levofloxacin | 34 | 30 |
| Lidocaine | Lidocaine | 34 | suppressed |
| Olanzapine | Olanzapine | 34 | suppressed |
| Xifaxan | Rifaximin | 34 | suppressed |
| Insulin Lispro | Insulin Lispro | 33 | 16 |
| Invega Sustenna | Paliperidone Palmitate | 33 | suppressed |
| Benazepril-Hydrochlorothiazide | Benazepril/Hydrochlorothiazide | 32 | suppressed |
| Bupropion Xl | Bupropion Hcl | 32 | suppressed |
| Carbamazepine Er | Carbamazepine | 31 | suppressed |
| Glipizide Er | Glipizide | 30 | suppressed |
| Brimonidine Tartrate | Brimonidine Tartrate | 29 | suppressed |
| Enoxaparin Sodium | Enoxaparin Sodium | 29 | 19 |
| Folic Acid | Folic Acid | 29 | suppressed |
| Insulin Lispro Kwikpen U-100 | Insulin Lispro | 29 | 18 |
| Breo Ellipta | Fluticasone/Vilanterol | 28 | suppressed |
| Cephalexin | Cephalexin | 28 | 23 |
| Linzess | Linaclotide | 28 | suppressed |
| Ranolazine Er | Ranolazine | 28 | suppressed |
| Hydrocortisone | Hydrocortisone | 27 | suppressed |
| Ibuprofen | Ibuprofen | 27 | 11 |
| Nitroglycerin | Nitroglycerin | 27 | 25 |
| Nystop | Nystatin | 27 | 20 |
| Valproic Acid | Valproic Acid (As Sodium Salt) | 27 | suppressed |
| Warfarin Sodium | Warfarin Sodium | 27 | suppressed |
| Clindamycin Hcl | Clindamycin Hcl | 26 | 21 |
| Ertapenem | Ertapenem Sodium | 26 | 12 |
| Ketoconazole | Ketoconazole | 26 | 16 |
| Carisoprodol | Carisoprodol | 25 | suppressed |
| Fluconazole | Fluconazole | 25 | 22 |
| Ondansetron Odt | Ondansetron | 25 | 15 |
| Hydroxyzine Pamoate | Hydroxyzine Pamoate | 24 | suppressed |
| Mupirocin | Mupirocin | 24 | 18 |
| Pramipexole Dihydrochloride | Pramipexole Di-Hcl | 24 | suppressed |
| Basaglar Kwikpen U-100 | Insulin Glargine,hum.Rec.Anlog | 23 | suppressed |
| Isosorbide Dinitrate | Isosorbide Dinitrate | 23 | suppressed |
| Lubiprostone | Lubiprostone | 23 | suppressed |
| Medroxyprogesterone Acetate | Medroxyprogesterone Acetate | 23 | suppressed |
| Venlafaxine Hcl Er | Venlafaxine Hcl | 23 | suppressed |
| Vitamin D2 | Ergocalciferol (Vitamin D2) | 23 | suppressed |
| Zonisamide | Zonisamide | 23 | suppressed |
| Bicalutamide | Bicalutamide | 22 | suppressed |
| Diltiazem Hcl | Diltiazem Hcl | 22 | suppressed |
| Solifenacin Succinate | Solifenacin Succinate | 22 | suppressed |
| Thiothixene | Thiothixene | 22 | suppressed |
| Diazepam | Diazepam | 21 | suppressed |
| Timolol Maleate | Timolol Maleate | 21 | suppressed |
| Advair Hfa | Fluticasone Propion/Salmeterol | 20 | suppressed |
| Amlodipine Besylate-Benazepril | Amlodipine Besylate/Benazepril | 20 | suppressed |
| Benazepril Hcl | Benazepril Hcl | 20 | suppressed |
| Lansoprazole | Lansoprazole | 20 | suppressed |
| Losartan-Hydrochlorothiazide | Losartan/Hydrochlorothiazide | 20 | suppressed |
| Naproxen | Naproxen | 20 | suppressed |
| Nitrofurantoin Mono-Macro | Nitrofurantoin Monohyd/M-Cryst | 20 | 16 |
| Promethazine Hcl | Promethazine Hcl | 20 | 14 |
| Calcium Acetate | Calcium Acetate | 19 | suppressed |
| Omega-3 Acid Ethyl Esters | Omega-3 Acid Ethyl Esters | 19 | suppressed |
| Paliperidone Er | Paliperidone | 19 | suppressed |
| Primidone | Primidone | 19 | suppressed |
| Cyproheptadine Hcl | Cyproheptadine Hcl | 18 | suppressed |
| Diltiazem 12hr Er | Diltiazem Hcl | 18 | suppressed |
| Esomeprazole Magnesium | Esomeprazole Magnesium | 18 | suppressed |
| Insulin Glargine-Yfgn | Insulin Glargine-Yfgn | 18 | 11 |
| Lidocaine Hcl | Lidocaine Hcl/Pf | 18 | 16 |
| Nuplazid | Pimavanserin Tartrate | 18 | suppressed |
| Permethrin | Permethrin | 18 | 12 |
| Prednisolone Acetate | Prednisolone Acetate | 18 | suppressed |
| Raloxifene Hcl | Raloxifene Hcl | 18 | suppressed |
| Topiramate | Topiramate | 18 | suppressed |
| Aptiom | Eslicarbazepine Acetate | 17 | suppressed |
| Glipizide-Metformin | Glipizide/Metformin Hcl | 17 | suppressed |
| Lovastatin | Lovastatin | 17 | suppressed |
| Meclizine Hcl | Meclizine Hcl | 17 | suppressed |
| Novolog Flexpen | Insulin Aspart | 17 | suppressed |
| Ozempic | Semaglutide | 17 | suppressed |
| Trelegy Ellipta | Fluticasone/Umeclidin/Vilanter | 17 | suppressed |
| Chlorthalidone | Chlorthalidone | 16 | suppressed |
| Dicyclomine Hcl | Dicyclomine Hcl | 16 | suppressed |
| Estradiol | Estradiol | 16 | suppressed |
| Lithium Carbonate | Lithium Carbonate | 16 | suppressed |
| Nitrofurantoin | Nitrofurantoin Macrocrystal | 16 | suppressed |
| Pentoxifylline | Pentoxifylline | 16 | suppressed |
| Pioglitazone Hcl | Pioglitazone Hcl | 16 | suppressed |
| Quetiapine Fumarate Er | Quetiapine Fumarate | 16 | suppressed |
| Sodium Chloride | 0.9 % Sodium Chloride | 16 | 11 |
| Travoprost | Travoprost | 16 | suppressed |
| Valsartan | Valsartan | 16 | suppressed |
| Ammonium Lactate | Ammonium Lactate | 15 | 13 |
| Hydroxychloroquine Sulfate | Hydroxychloroquine Sulfate | 15 | suppressed |
| Icosapent Ethyl | Icosapent Ethyl | 15 | suppressed |
| Labetalol Hcl | Labetalol Hcl | 15 | suppressed |
| Rexulti | Brexpiprazole | 15 | suppressed |
| Terazosin Hcl | Terazosin Hcl | 15 | suppressed |
| Zolpidem Tartrate | Zolpidem Tartrate | 15 | suppressed |
| Amlodipine-Olmesartan | Amlodipine Bes/Olmesartan Med | 14 | suppressed |
| Clobetasol Propionate | Clobetasol Propionate | 14 | suppressed |
| Incruse Ellipta | Umeclidinium Bromide | 14 | suppressed |
| Levalbuterol Hcl | Levalbuterol Hcl | 14 | suppressed |
| Lokelma | Sodium Zirconium Cyclosilicate | 14 | suppressed |
| Methimazole | Methimazole | 14 | suppressed |
| Sevelamer Hcl | Sevelamer Hcl | 14 | suppressed |
| Triamterene-Hydrochlorothiazid | Triamterene/Hydrochlorothiazid | 14 | suppressed |
| Bupropion Hcl | Bupropion Hcl | 13 | suppressed |
| Cinacalcet Hcl | Cinacalcet Hcl | 13 | suppressed |
| Doxycycline Monohydrate | Doxycycline Monohydrate | 13 | suppressed |
| Fluocinolone Acetonide | Fluocinolone Acetonide | 13 | suppressed |
| Fluticasone-Salmeterol Hfa | Fluticasone Propion/Salmeterol | 13 | suppressed |
| Insulin Aspart Flexpen | Insulin Aspart | 13 | suppressed |
| Insulin Degludec Pen (U-100) | Insulin Degludec | 13 | suppressed |
| Lumigan | Bimatoprost | 13 | suppressed |
| Mirabegron Er | Mirabegron | 13 | suppressed |
| Nebivolol Hcl | Nebivolol Hcl | 13 | suppressed |
| Neupro | Rotigotine | 13 | suppressed |
| Fludrocortisone Acetate | Fludrocortisone Acetate | 12 | suppressed |
| Pyridostigmine Bromide | Pyridostigmine Bromide | 12 | suppressed |
| Bethanechol Chloride | Bethanechol Chloride | 11 | suppressed |
| Entacapone | Entacapone | 11 | suppressed |
| Erythromycin | Erythromycin Base | 11 | suppressed |
| Fluticasone-Salmeterol | Fluticasone Propion/Salmeterol | 11 | suppressed |
| Novofine Autocover | Pen Needle, Diabetic, Safety | 11 | suppressed |
| Serevent Diskus | Salmeterol Xinafoate | 11 | suppressed |
| Sotalol | Sotalol Hcl | 11 | suppressed |
| Valacyclovir | Valacyclovir Hcl | 11 | suppressed |
Timeline
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 | $310.87 · 3 records | ACADIA Pharmaceuticals Inc | AUSTEDO XR, NUPLAZID | 1 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
These are general questions generated from reviewed templates. They are not personalized medical advice.
Sources and limitations
| 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