Healthcare provider profile · identity verified

Robert G Tayengco, MD

Allopathic & Osteopathic Physicians|Internal Medicine · MASON, WV · NPI 1215038401

Profile state: payments and partd Open Payments: 2025 Medicare Part D: 2024 Last identity check: 2026-08-10 Page data build: 2026-08-12

Verified facts

What the public records show

CMS Open Payments records show Robert G Tayengco, MD received $63.16 in general payments during 2025 across 4 reported records.

Otsuka America Pharmaceutical, Inc. accounted for 29.8% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 5 associated products.

Otsuka America Pharmaceutical, 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 ABILIFY MAINTENA as an associated drug or biological on 27924 records involving 10497 distinct recipient NPIs. Public Medicare Part D data also shows 13 claims for Abilify Maintena 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 456 claims for Eliquis 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 PAXLOVID as an associated drug or biological on 24465 records involving 15715 distinct recipient NPIs. Public Medicare Part D data also shows 14 claims for Paxlovid by this doctor in 2024.

These records do not establish that a payment influenced prescribing or medical care.

Payment overview · 2025

General Payments

$63.16

4 reported records · 4 companies

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
Otsuka America Pharmaceutical, Inc.	Unresolved — no canonical attribution shown	$18.79	29.8%	1	2025
Amgen Inc.	Unresolved — no canonical attribution shown	$15.27	24.2%	1	2025
PFIZER INC.	Unresolved — no canonical attribution shown	$14.92	23.6%	1	2025
Regeneron Healthcare Solutions, Inc.	Unresolved — no canonical attribution shown	$14.18	22.4%	1	2025

What were the payments for?

Payment categories

Category	Amount	Records
Food and Beverage	$63.16	4

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
REXULTI Normalized: rexulti	Drug	Otsuka America Pharmaceutical, Inc.	$18.79	1	2025
Source payment records 2025-07-22 · Otsuka America Pharmaceutical, Inc. · $18.79 · Open Payments source
OTEZLA Normalized: otezla	Drug	Amgen Inc.	$15.27	1	2025
Source payment records 2025-07-17 · Amgen Inc. · $15.27 · Open Payments source
REPATHA Normalized: repatha	Biological	Amgen Inc.	$15.27	1	2025
Source payment records 2025-07-17 · Amgen Inc. · $15.27 · Open Payments source
VYNDAQEL Normalized: vyndaqel	Drug	PFIZER INC.	$14.92	1	2025
Source payment records 2025-10-14 · PFIZER INC. · $14.92 · Open Payments source
DUPIXENT Normalized: dupixent	Biological	Regeneron Healthcare Solutions, Inc.	$14.18	1	2025
Source payment records 2025-04-16 · Regeneron Healthcare Solutions, Inc. · $14.18 · Open Payments source

* 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
Otsuka America Pharmaceutical, Inc. Exact reporting entity; no affiliate inference	2025	ABILIFY MAINTENA open payments reported associated product	CMS Open Payments — General Payments 27924 supporting records · 10497 recipient NPIs · example record 1227267721	Abilify Maintena · 2024 Exact normalized brand match · 1 Part D row	13	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	456	81
PFIZER INC. Exact reporting entity; no affiliate inference	2025	PAXLOVID open payments reported associated product	CMS Open Payments — General Payments 24465 supporting records · 15715 recipient NPIs · example record 1228794432	Paxlovid · 2024 Exact normalized brand match · 1 Part D row	14	14

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
Levothyroxine Sodium	Levothyroxine Sodium	1089	240
Gabapentin	Gabapentin	945	133
Amlodipine Besylate	Amlodipine Besylate	807	222
Metoprolol Succinate	Metoprolol Succinate	736	179
Pantoprazole Sodium	Pantoprazole Sodium	681	151
Atorvastatin Calcium	Atorvastatin Calcium	644	183
Furosemide	Furosemide	587	159
Losartan Potassium	Losartan Potassium	556	148
Rosuvastatin Calcium	Rosuvastatin Calcium	493	144
Tramadol Hcl	Tramadol Hcl	475	78
Potassium Chloride	Potassium Chloride	464	131
Omeprazole	Omeprazole	461	117
Lisinopril	Lisinopril	459	128
Eliquis	Apixaban	456	81
Metformin Hcl	Metformin Hcl	456	119
Albuterol Sulfate Hfa	Albuterol Sulfate	435	131
Lorazepam	Lorazepam	418	48
Tamsulosin Hcl	Tamsulosin Hcl	388	87
Pravastatin Sodium	Pravastatin Sodium	385	127
Acetaminophen-Codeine	Acetaminophen With Codeine	370	46
Carvedilol	Carvedilol	364	90
Alprazolam	Alprazolam	358	66
Famotidine	Famotidine	328	66
Metoprolol Tartrate	Metoprolol Tartrate	322	84
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	315	69
Buspirone Hcl	Buspirone Hcl	303	56
Clopidogrel	Clopidogrel Bisulfate	303	87
Duloxetine Hcl	Duloxetine Hcl	252	55
Glimepiride	Glimepiride	252	75
Sertraline Hcl	Sertraline Hcl	251	67
Diazepam	Diazepam	246	54
Valsartan	Valsartan	227	50
Quetiapine Fumarate	Quetiapine Fumarate	225	28
Trazodone Hcl	Trazodone Hcl	202	43
Ozempic	Semaglutide	199	45
Ibuprofen	Ibuprofen	198	60
Cephalexin	Cephalexin	197	99
Montelukast Sodium	Montelukast Sodium	190	49
Prednisone	Prednisone	187	92
Venlafaxine Hcl Er	Venlafaxine Hcl	184	29
Allopurinol	Allopurinol	176	44
Fluticasone Propionate	Fluticasone Propionate	171	67
Zolpidem Tartrate	Zolpidem Tartrate	171	40
Hydrochlorothiazide	Hydrochlorothiazide	169	53
Ondansetron Hcl	Ondansetron Hcl	166	48
Clonazepam	Clonazepam	164	20
Lamotrigine	Lamotrigine	164	16
Enulose	Lactulose	161	suppressed
Jardiance	Empagliflozin	161	28
Temazepam	Temazepam	157	24
Clozapine	Clozapine	151	suppressed
Levetiracetam	Levetiracetam	145	18
Bupropion Xl	Bupropion Hcl	141	34
Linzess	Linaclotide	141	19
Donepezil Hcl	Donepezil Hcl	139	21
Doxycycline Hyclate	Doxycycline Hyclate	138	89
Finasteride	Finasteride	138	25
Tizanidine Hcl	Tizanidine Hcl	138	31
Meloxicam	Meloxicam	134	49
Simvastatin	Simvastatin	132	37
Fluoxetine Hcl	Fluoxetine Hcl	131	37
Nystatin	Nystatin	131	45
Symbicort	Budesonide/Formoterol Fumarate	127	39
Pregabalin	Pregabalin	125	22
Citalopram Hbr	Citalopram Hydrobromide	123	32
Clonidine Hcl	Clonidine Hcl	113	35
Risperidone	Risperidone	112	suppressed
Trulicity	Dulaglutide	109	25
Atenolol	Atenolol	107	25
Nitroglycerin	Nitroglycerin	107	53
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	106	38
Farxiga	Dapagliflozin Propanediol	104	20
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	101	19
Alendronate Sodium	Alendronate Sodium	99	27
Amoxicillin	Amoxicillin	99	69
Spironolactone	Spironolactone	98	28
Mounjaro	Tirzepatide	94	16
Ropinirole Hcl	Ropinirole Hcl	92	25
Ezetimibe	Ezetimibe	91	37
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	89	19
Propranolol Hcl	Propranolol Hcl	89	17
Celecoxib	Celecoxib	88	30
Fluconazole	Fluconazole	87	52
Olanzapine	Olanzapine	87	suppressed
Xifaxan	Rifaximin	87	suppressed
Paroxetine Hcl	Paroxetine Hcl	85	22
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	84	27
Mirtazapine	Mirtazapine	84	16
Sucralfate	Sucralfate	83	28
Breo Ellipta	Fluticasone/Vilanterol	81	26
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	78	20
Phenobarbital	Phenobarbital	78	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	76	22
Ciprofloxacin Hcl	Ciprofloxacin Hcl	70	42
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	70	16
Xarelto	Rivaroxaban	68	15
Escitalopram Oxalate	Escitalopram Oxalate	67	16
Lantus	Insulin Glargine,hum.Rec.Anlog	66	suppressed
Olanzapine Odt	Olanzapine	64	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	63	17
Tresiba Flextouch U-100	Insulin Degludec	63	11
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	62	39
Ventolin Hfa	Albuterol Sulfate	62	17
Novolog Flexpen	Insulin Aspart	61	21
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	59	20
Diltiazem Hcl	Diltiazem Hcl	58	15
Labetalol Hcl	Labetalol Hcl	58	11
Divalproex Sodium	Divalproex Sodium	56	suppressed
Methocarbamol	Methocarbamol	56	17
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	54	21
Hydralazine Hcl	Hydralazine Hcl	52	15
Entresto	Sacubitril/Valsartan	51	suppressed
Naproxen	Naproxen	51	15
Vraylar	Cariprazine Hcl	51	suppressed
Warfarin Sodium	Warfarin Sodium	51	13
Baclofen	Baclofen	50	suppressed
Cefdinir	Cefdinir	50	33
Glipizide	Glipizide	50	13
Promethazine Hcl	Promethazine Hcl	50	11
Topiramate	Topiramate	50	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	49	17
Aripiprazole	Aripiprazole	48	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	48	suppressed
Januvia	Sitagliptin Phosphate	47	suppressed
Meclizine Hcl	Meclizine Hcl	46	20
Hydroxychloroquine Sulfate	Hydroxychloroquine Sulfate	45	14
Triamcinolone Acetonide	Triamcinolone Acetonide	45	27
Venlafaxine Hcl	Venlafaxine Hcl	45	suppressed
Lithium Carbonate	Lithium Carbonate	44	suppressed
Memantine Hcl	Memantine Hcl	44	suppressed
Oxcarbazepine	Oxcarbazepine	44	suppressed
Primidone	Primidone	44	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	44	20
Levofloxacin	Levofloxacin	43	31
Ultra-Fine Nano Pen Needle	Pen Needle, Diabetic	43	14
Bumetanide	Bumetanide	42	12
Fenofibrate	Fenofibrate Nanocrystallized	42	11
Repatha Sureclick	Evolocumab	40	suppressed
Carbamazepine	Carbamazepine	39	suppressed
Flecainide Acetate	Flecainide Acetate	39	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	38	suppressed
Hydroxyzine Pamoate	Hydroxyzine Pamoate	38	13
Ibu	Ibuprofen	38	11
Ultra-Fine Short Pen Needle	Pen Needle, Diabetic	37	15
Novolog	Insulin Aspart	36	suppressed
Hydrocortisone	Hydrocortisone	35	14
Nabumetone	Nabumetone	35	suppressed
Valacyclovir	Valacyclovir Hcl	35	20
Dicyclomine Hcl	Dicyclomine Hcl	33	13
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	33	suppressed
Metronidazole	Metronidazole	32	18
Butalbital-Acetaminophen-Caffe	Butalb/Acetaminophen/Caffeine	30	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	30	suppressed
Breyna	Budesonide/Formoterol Fumarate	29	11
Morphine Sulfate	Morphine Sulfate	29	12
Nifedipine Er	Nifedipine	29	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	28	23
Fentanyl	Fentanyl	28	suppressed
Spiriva Handihaler	Tiotropium Bromide	28	suppressed
Benazepril Hcl	Benazepril Hcl	27	suppressed
Diclofenac Sodium	Diclofenac Sodium	27	suppressed
Doxepin Hcl	Doxepin Hcl	27	suppressed
Valproic Acid	Valproic Acid (As Sodium Salt)	27	suppressed
Benztropine Mesylate	Benztropine Mesylate	26	suppressed
Myrbetriq	Mirabegron	26	suppressed
Azithromycin	Azithromycin	25	16
Demeclocycline Hcl	Demeclocycline Hcl	25	suppressed
Phenytoin Sodium Extended	Phenytoin Sodium Extended	25	suppressed
Rybelsus	Semaglutide	25	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	25	suppressed
Amiodarone Hcl	Amiodarone Hcl	24	suppressed
Atrovent Hfa	Ipratropium Bromide	24	suppressed
Clotrimazole-Betamethasone	Clotrimazole/Betamethasone Dip	24	17
Diphenoxylate-Atropine	Diphenoxylate Hcl/Atropine	23	suppressed
Haloperidol Decanoate	Haloperidol Decanoate	23	suppressed
Lansoprazole	Lansoprazole	23	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	22	suppressed
Spiriva Respimat	Tiotropium Bromide	22	suppressed
Tresiba Flextouch U-200	Insulin Degludec	22	suppressed
Colchicine	Colchicine	21	11
Divalproex Sodium Er	Divalproex Sodium	21	suppressed
Humalog Kwikpen U-100	Insulin Lispro	21	suppressed
Incruse Ellipta	Umeclidinium Bromide	21	suppressed
Terbinafine Hcl	Terbinafine Hcl	21	suppressed
Budesonide-Formoterol Fumarate	Budesonide/Formoterol Fumarate	20	suppressed
Carbidopa-Levodopa	Carbidopa/Levodopa	20	suppressed
Colestipol Hcl	Colestipol Hcl	20	suppressed
Ipratropium Bromide	Ipratropium Bromide	20	suppressed
Lidocaine	Lidocaine	20	12
Mupirocin	Mupirocin	20	11
Synthroid	Levothyroxine Sodium	20	suppressed
Gemfibrozil	Gemfibrozil	19	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	19	suppressed
Oxycodone Hcl	Oxycodone Hcl	19	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	19	suppressed
Bisoprolol-Hydrochlorothiazide	Bisoprolol/Hydrochlorothiazide	18	suppressed
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	18	suppressed
Diltiazem 12hr Er	Diltiazem Hcl	18	suppressed
Estradiol	Estradiol	18	suppressed
Lactulose	Lactulose	18	suppressed
Acarbose	Acarbose	17	11
Sotalol	Sotalol Hcl	17	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	17	suppressed
Ziprasidone Hcl	Ziprasidone Hcl	17	suppressed
Atropine Sulfate	Atropine Sulfate	16	suppressed
Cinacalcet Hcl	Cinacalcet Hcl	16	suppressed
Clindamycin Hcl	Clindamycin Hcl	16	suppressed
Combivent Respimat	Ipratropium/Albuterol Sulfate	16	suppressed
Jantoven	Warfarin Sodium	16	suppressed
Levocetirizine Dihydrochloride	Levocetirizine Dihydrochloride	16	suppressed
Midodrine Hcl	Midodrine Hcl	16	suppressed
Mometasone Furoate	Mometasone Furoate	16	suppressed
Nyamyc	Nystatin	16	suppressed
Armour Thyroid	Thyroid,pork	15	suppressed
Breztri Aerosphere	Budesonide/Glycopyr/Formoterol	15	suppressed
Isosorbide Mononitrate	Isosorbide Mononitrate	15	suppressed
Ketoconazole	Ketoconazole	15	suppressed
Metformin Hcl Er	Metformin Hcl	15	suppressed
Multaq	Dronedarone Hcl	15	suppressed
Olmesartan Medoxomil	Olmesartan Medoxomil	15	suppressed
Prazosin Hcl	Prazosin Hcl	15	suppressed
Ranolazine Er	Ranolazine	15	suppressed
Trihexyphenidyl Hcl	Trihexyphenidyl Hcl	15	suppressed
Valproic Acid	Valproic Acid	15	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	14	suppressed
Constulose	Lactulose	14	suppressed
Dutasteride	Dutasteride	14	suppressed
Gemtesa	Vibegron	14	suppressed
Lithium Carbonate Er	Lithium Carbonate	14	suppressed
Loxapine	Loxapine Succinate	14	suppressed
Namzaric	Memantine Hcl/Donepezil Hcl	14	suppressed
Nebivolol Hcl	Nebivolol Hcl	14	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	14	14
Toujeo Max Solostar	Insulin Glargine,hum.Rec.Anlog	14	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	14	suppressed
Abilify Maintena	Aripiprazole	13	suppressed
Cholestyramine	Cholestyramine (With Sugar)	13	suppressed
Dropsafe Prep Pads	Alcohol Antiseptic Pads	13	suppressed
Enalapril Maleate	Enalapril Maleate	13	suppressed
Enbrel Sureclick	Etanercept	13	suppressed
Glyburide	Glyburide	13	suppressed
Invega Sustenna	Paliperidone Palmitate	13	suppressed
Latanoprost	Latanoprost	13	suppressed
Lovastatin	Lovastatin	13	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	13	suppressed
Quetiapine Fumarate Er	Quetiapine Fumarate	13	suppressed
Rivastigmine	Rivastigmine Tartrate	13	suppressed
Ultra-Fine Mini Pen Needle	Pen Needle, Diabetic	13	suppressed
Arnuity Ellipta	Fluticasone Furoate	12	suppressed
Atenolol-Chlorthalidone	Atenolol/Chlorthalidone	12	suppressed
Azelastine Hcl	Azelastine Hcl	12	suppressed
Chlorthalidone	Chlorthalidone	12	suppressed
Gentamicin Sulfate	Gentamicin Sulfate	12	11
Isosorbide Dinitrate	Isosorbide Dinitrate	12	suppressed
Levemir Flexpen	Insulin Detemir	12	suppressed
Modafinil	Modafinil	12	suppressed
Ondansetron Odt	Ondansetron	12	suppressed
Prochlorperazine Maleate	Prochlorperazine Maleate	12	suppressed
Rabeprazole Sodium	Rabeprazole Sodium	12	suppressed
Testosterone	Testosterone	12	suppressed
Anastrozole	Anastrozole	11	suppressed
Calcitriol	Calcitriol	11	suppressed
Fenofibrate	Fenofibrate	11	suppressed
Flurbiprofen	Flurbiprofen	11	suppressed
Glipizide-Metformin	Glipizide/Metformin Hcl	11	suppressed
Insulin Aspart	Insulin Aspart	11	suppressed
Lurasidone Hcl	Lurasidone Hcl	11	suppressed
Raloxifene Hcl	Raloxifene Hcl	11	suppressed
Torsemide	Torsemide	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	$63.16 · 4 records	Otsuka America Pharmaceutical, Inc.	DUPIXENT, OTEZLA, REPATHA, REXULTI, VYNDAQEL	3	—
2024	—	—	—	—	Complete

Questions to ask

Questions you could discuss with your doctor

How do you evaluate evidence when you have a financial relationship with Otsuka America Pharmaceutical, 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

Methodology version: 2.1

Editorial template version: 2.4

Product contract version: 2.0

Schema version: 0.7.0

Page data build: 2026-08-12T23:34:59.370714+00:00

Publication policy: eligible for indexing after public-launch controls are enabled

Full methodology · Questions & answers · Report a possible error