Healthcare provider profile · identity verified

Patrick M Knowles, MD

Family Practice · PHOENIX, AZ · NPI 1053313452

Profile state: partd only 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

We did not find matching Open Payments records for this doctor in 2025.

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

Payment overview · 2025

General Payments

We did not find matching Open Payments records for this doctor in the selected program year.

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.

Analysis 1 · Payment-linked products

Products named in Open Payments records

No payment-linked product analysis is available because no matching General Payment records were found for the selected year.

Public prescribing for products named in payments

There is no explicit payment-product set available for a Part D comparison.

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.

There is no payer-company set available for this comparison.

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	584	172
Levothyroxine Sodium	Levothyroxine Sodium	497	133
Rosuvastatin Calcium	Rosuvastatin Calcium	481	137
Lisinopril	Lisinopril	359	103
Losartan Potassium	Losartan Potassium	347	111
Amlodipine Besylate	Amlodipine Besylate	339	110
Gabapentin	Gabapentin	303	79
Metformin Hcl	Metformin Hcl	282	88
Azelastine Hcl	Azelastine Hcl	278	148
Hydrochlorothiazide	Hydrochlorothiazide	276	86
Pantoprazole Sodium	Pantoprazole Sodium	238	78
Tamsulosin Hcl	Tamsulosin Hcl	236	68
Omeprazole	Omeprazole	227	69
Montelukast Sodium	Montelukast Sodium	214	60
Alprazolam	Alprazolam	205	44
Potassium Chloride	Potassium Chloride	189	59
Tramadol Hcl	Tramadol Hcl	189	61
Metoprolol Succinate	Metoprolol Succinate	175	54
Albuterol Sulfate Hfa	Albuterol Sulfate	167	80
Trazodone Hcl	Trazodone Hcl	163	44
Duloxetine Hcl	Duloxetine Hcl	160	35
Simvastatin	Simvastatin	154	44
Furosemide	Furosemide	150	52
Allopurinol	Allopurinol	140	43
Mounjaro	Tirzepatide	135	21
Tizanidine Hcl	Tizanidine Hcl	133	24
Baclofen	Baclofen	132	67
Metoprolol Tartrate	Metoprolol Tartrate	129	42
Escitalopram Oxalate	Escitalopram Oxalate	128	37
Meloxicam	Meloxicam	126	41
Pioglitazone Hcl	Pioglitazone Hcl	120	28
Famotidine	Famotidine	115	37
Mirtazapine	Mirtazapine	111	31
Zolpidem Tartrate	Zolpidem Tartrate	110	35
Oxycodone Hcl	Oxycodone Hcl	109	22
Prednisone	Prednisone	109	80
Pravastatin Sodium	Pravastatin Sodium	99	29
Sertraline Hcl	Sertraline Hcl	99	33
Azithromycin	Azithromycin	98	68
Bupropion Xl	Bupropion Hcl	97	26
Doxycycline Hyclate	Doxycycline Hyclate	93	79
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	93	33
Clopidogrel	Clopidogrel Bisulfate	92	29
Ozempic	Semaglutide	84	16
Amitriptyline Hcl	Amitriptyline Hcl	71	19
Januvia	Sitagliptin Phosphate	70	15
Fluticasone Propionate	Fluticasone Propionate	69	19
Ezetimibe	Ezetimibe	63	20
Atenolol	Atenolol	62	20
Eliquis	Apixaban	62	22
Carvedilol	Carvedilol	61	20
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	60	17
Citalopram Hbr	Citalopram Hydrobromide	59	17
Metformin Hcl Er	Metformin Hcl	59	17
Glimepiride	Glimepiride	58	21
Propranolol Hcl	Propranolol Hcl	58	17
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	57	29
Ondansetron Odt	Ondansetron	57	31
Anastrozole	Anastrozole	53	16
Buspirone Hcl	Buspirone Hcl	53	11
Spironolactone	Spironolactone	53	20
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	52	45
Olmesartan Medoxomil	Olmesartan Medoxomil	51	14
Paroxetine Hcl	Paroxetine Hcl	51	12
Sumatriptan Succinate	Sumatriptan Succinate	51	suppressed
Valacyclovir	Valacyclovir Hcl	51	20
Ciprofloxacin Hcl	Ciprofloxacin Hcl	50	40
Finasteride	Finasteride	50	15
Valsartan	Valsartan	49	14
Irbesartan	Irbesartan	48	14
Pregabalin	Pregabalin	48	13
Ropinirole Hcl	Ropinirole Hcl	47	13
Butalbital-Acetaminophen-Caffe	Butalb/Acetaminophen/Caffeine	46	suppressed
Ibuprofen	Ibuprofen	46	14
Lorazepam	Lorazepam	46	17
Synthroid	Levothyroxine Sodium	46	16
Venlafaxine Hcl Er	Venlafaxine Hcl	46	13
Trulicity	Dulaglutide	45	suppressed
Alendronate Sodium	Alendronate Sodium	44	13
Quetiapine Fumarate	Quetiapine Fumarate	44	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	42	13
Fluconazole	Fluconazole	41	16
Fluoxetine Hcl	Fluoxetine Hcl	41	13
Celecoxib	Celecoxib	40	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	40	19
Bupropion Hcl Sr	Bupropion Hcl	37	11
Clotrimazole-Betamethasone	Clotrimazole/Betamethasone Dip	37	25
Gemfibrozil	Gemfibrozil	36	11
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	36	25
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	36	suppressed
Cephalexin	Cephalexin	35	27
Testosterone Cypionate	Testosterone Cypionate	35	13
Triamcinolone Acetonide	Triamcinolone Acetonide	34	23
Clonazepam	Clonazepam	33	suppressed
Mupirocin	Mupirocin	33	22
Donepezil Hcl	Donepezil Hcl	32	12
Linzess	Linaclotide	32	suppressed
Diclofenac Sodium	Diclofenac Sodium	31	17
Doxazosin Mesylate	Doxazosin Mesylate	31	suppressed
Estradiol	Estradiol	30	12
Farxiga	Dapagliflozin Propanediol	30	suppressed
Amoxicillin	Amoxicillin	29	17
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	29	suppressed
Xarelto	Rivaroxaban	29	suppressed
Benazepril Hcl	Benazepril Hcl	28	suppressed
Carisoprodol	Carisoprodol	27	suppressed
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	27	suppressed
Jardiance	Empagliflozin	27	suppressed
Methylprednisolone	Methylprednisolone	27	19
Ondansetron Hcl	Ondansetron Hcl	27	suppressed
Enalapril Maleate	Enalapril Maleate	26	suppressed
Fenofibrate	Fenofibrate	26	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	26	25
Esomeprazole Magnesium	Esomeprazole Magnesium	25	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	25	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	25	12
Terbinafine Hcl	Terbinafine Hcl	25	11
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	24	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	23	suppressed
Lovastatin	Lovastatin	23	suppressed
Nebivolol Hcl	Nebivolol Hcl	23	suppressed
Diazepam	Diazepam	22	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	22	suppressed
Lantus	Insulin Glargine,hum.Rec.Anlog	22	suppressed
Meclizine Hcl	Meclizine Hcl	22	suppressed
Promethazine Hcl	Promethazine Hcl	22	suppressed
Tobramycin	Tobramycin	22	18
Warfarin Sodium	Warfarin Sodium	22	suppressed
Diphenoxylate-Atropine	Diphenoxylate Hcl/Atropine	21	suppressed
Levofloxacin	Levofloxacin	21	15
Naproxen	Naproxen	21	suppressed
Olmesartan-Hydrochlorothiazide	Olmesartan/Hydrochlorothiazide	21	suppressed
Testosterone	Testosterone	21	suppressed
Verapamil Er	Verapamil Hcl	21	suppressed
Glipizide Er	Glipizide	20	suppressed
Myrbetriq	Mirabegron	20	suppressed
Acyclovir	Acyclovir	19	suppressed
Glipizide	Glipizide	19	suppressed
Nystatin	Nystatin	19	11
Oxybutynin Chloride	Oxybutynin Chloride	19	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	19	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	18	suppressed
Dutasteride	Dutasteride	18	suppressed
Ipratropium Bromide	Ipratropium Bromide	18	suppressed
Descovy	Emtricitabine/Tenofov Alafenam	17	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	17	suppressed
Vascepa	Icosapent Ethyl	17	suppressed
Bydureon Bcise	Exenatide Microspheres	16	suppressed
Latanoprost	Latanoprost	15	suppressed
Topiramate	Topiramate	15	suppressed
Eszopiclone	Eszopiclone	14	suppressed
Hydralazine Hcl	Hydralazine Hcl	14	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	14	suppressed
Nitroglycerin	Nitroglycerin	14	suppressed
Chlorthalidone	Chlorthalidone	13	suppressed
Creon	Lipase/Protease/Amylase	13	suppressed
Emtricitabine-Tenofovir Disop	Emtricitabine/Tenofovir (Tdf)	13	suppressed
Nifedipine Er	Nifedipine	13	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	13	suppressed
Prochlorperazine Maleate	Prochlorperazine Maleate	13	suppressed
Temazepam	Temazepam	13	suppressed
Estradiol (Once Weekly)	Estradiol	12	suppressed
Levocetirizine Dihydrochloride	Levocetirizine Dihydrochloride	12	suppressed
Memantine Hcl	Memantine Hcl	12	suppressed
Nalbuphine Hcl	Nalbuphine Hcl	12	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	12	suppressed
Propranolol Hcl Er	Propranolol Hcl	12	suppressed
Raloxifene Hcl	Raloxifene Hcl	12	suppressed
Tolterodine Tartrate Er	Tolterodine Tartrate	12	suppressed
Cholestyramine Light	Cholestyramine	11	suppressed
Cyanocobalamin Injection	Cyanocobalamin (Vitamin B-12)	11	suppressed
Cyproheptadine Hcl	Cyproheptadine Hcl	11	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	11	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	11	suppressed
Modafinil	Modafinil	11	suppressed
Venlafaxine Hcl	Venlafaxine Hcl	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	—	—	—	—	—
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

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