Healthcare provider profile · identity verified

Christopher S Quarles, MD

Family Practice · PORT ORCHARD, WA · NPI 1629057658

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	465	163
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	335	62
Oxycodone Hcl	Oxycodone Hcl	271	38
Lisinopril	Lisinopril	256	90
Losartan Potassium	Losartan Potassium	252	88
Levothyroxine Sodium	Levothyroxine Sodium	227	83
Omeprazole	Omeprazole	227	74
Metoprolol Succinate	Metoprolol Succinate	226	69
Gabapentin	Gabapentin	222	91
Amlodipine Besylate	Amlodipine Besylate	218	77
Albuterol Sulfate Hfa	Albuterol Sulfate	212	75
Furosemide	Furosemide	174	52
Metformin Hcl	Metformin Hcl	152	52
Trazodone Hcl	Trazodone Hcl	152	53
Tramadol Hcl	Tramadol Hcl	145	39
Simvastatin	Simvastatin	142	40
Tamsulosin Hcl	Tamsulosin Hcl	140	51
Alprazolam	Alprazolam	132	30
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	121	38
Hydrochlorothiazide	Hydrochlorothiazide	118	44
Meloxicam	Meloxicam	116	48
Duloxetine Hcl	Duloxetine Hcl	104	29
Potassium Chloride	Potassium Chloride	96	33
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	93	13
Allopurinol	Allopurinol	88	29
Pantoprazole Sodium	Pantoprazole Sodium	87	28
Ondansetron Odt	Ondansetron	81	25
Lorazepam	Lorazepam	80	15
Fluticasone Propionate	Fluticasone Propionate	78	36
Rosuvastatin Calcium	Rosuvastatin Calcium	78	27
Carvedilol	Carvedilol	73	21
Butalbital-Acetaminophen-Caffe	Butalb/Acetaminophen/Caffeine	70	suppressed
Metoprolol Tartrate	Metoprolol Tartrate	70	27
Morphine Sulfate Er	Morphine Sulfate	68	suppressed
Ozempic	Semaglutide	63	15
Pregabalin	Pregabalin	61	17
Atenolol	Atenolol	60	17
Clonazepam	Clonazepam	58	15
Escitalopram Oxalate	Escitalopram Oxalate	58	20
Quetiapine Fumarate	Quetiapine Fumarate	58	16
Sumatriptan Succinate	Sumatriptan Succinate	57	11
Metformin Hcl Er	Metformin Hcl	56	19
Spironolactone	Spironolactone	54	19
Alendronate Sodium	Alendronate Sodium	53	18
Diazepam	Diazepam	53	13
Montelukast Sodium	Montelukast Sodium	53	16
Xarelto	Rivaroxaban	53	19
Jardiance	Empagliflozin	51	17
Famotidine	Famotidine	50	23
Pravastatin Sodium	Pravastatin Sodium	50	17
Clopidogrel	Clopidogrel Bisulfate	48	11
Topiramate	Topiramate	48	21
Warfarin Sodium	Warfarin Sodium	47	15
Oxybutynin Chloride Er	Oxybutynin Chloride	45	12
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	44	30
Citalopram Hbr	Citalopram Hydrobromide	43	16
Methadone Hcl	Methadone Hcl	43	suppressed
Buspirone Hcl	Buspirone Hcl	41	15
Hydroxyzine Hcl	Hydroxyzine Hcl	41	15
Finasteride	Finasteride	39	12
Propranolol Hcl	Propranolol Hcl	38	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	38	27
Bupropion Xl	Bupropion Hcl	37	16
Lamotrigine	Lamotrigine	37	14
Prednisone	Prednisone	37	17
Sertraline Hcl	Sertraline Hcl	36	13
Tizanidine Hcl	Tizanidine Hcl	34	suppressed
Torsemide	Torsemide	34	12
Chlorthalidone	Chlorthalidone	33	13
Methocarbamol	Methocarbamol	33	12
Naproxen	Naproxen	33	11
Fluoxetine Hcl	Fluoxetine Hcl	32	15
Mirtazapine	Mirtazapine	32	suppressed
Ropinirole Hcl	Ropinirole Hcl	32	suppressed
Benazepril Hcl	Benazepril Hcl	31	suppressed
Ibuprofen	Ibuprofen	31	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	31	suppressed
Zolpidem Tartrate	Zolpidem Tartrate	31	17
Baclofen	Baclofen	30	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	29	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	28	suppressed
Hydromorphone Hcl	Hydromorphone Hcl	28	suppressed
Estradiol	Estradiol	27	suppressed
Latanoprost	Latanoprost	27	suppressed
Trulicity	Dulaglutide	27	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	27	suppressed
Dextroamphetamine-Amphet Er	Dextroamphetamine/Amphetamine	26	suppressed
Advair Hfa	Fluticasone Propion/Salmeterol	25	suppressed
Morphine Sulfate	Morphine Sulfate	25	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	24	20
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	23	suppressed
Paroxetine Hcl	Paroxetine Hcl	23	suppressed
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	22	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	22	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	21	suppressed
Bupropion Hcl Sr	Bupropion Hcl	20	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	20	suppressed
Hydralazine Hcl	Hydralazine Hcl	20	suppressed
Hydroxyzine Pamoate	Hydroxyzine Pamoate	20	suppressed
Levetiracetam	Levetiracetam	20	suppressed
Mounjaro	Tirzepatide	20	suppressed
Nystatin	Nystatin	20	13
Symbicort	Budesonide/Formoterol Fumarate	20	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	19	suppressed
Azelastine Hcl	Azelastine Hcl	19	suppressed
Fluconazole	Fluconazole	19	15
Lovastatin	Lovastatin	19	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	19	suppressed
Acyclovir	Acyclovir	18	suppressed
Azithromycin	Azithromycin	18	18
Cephalexin	Cephalexin	18	15
Nortriptyline Hcl	Nortriptyline Hcl	18	suppressed
Budesonide-Formoterol Fumarate	Budesonide/Formoterol Fumarate	16	suppressed
Clonidine Hcl	Clonidine Hcl	16	suppressed
Eliquis	Apixaban	16	suppressed
Glipizide	Glipizide	16	suppressed
Ramipril	Ramipril	16	suppressed
Ventolin Hfa	Albuterol Sulfate	16	suppressed
Ibu	Ibuprofen	15	suppressed
Levofloxacin	Levofloxacin	15	14
Testosterone Cypionate	Testosterone Cypionate	15	suppressed
Tresiba Flextouch U-200	Insulin Degludec	15	suppressed
Aripiprazole	Aripiprazole	14	suppressed
Lidocaine	Lidocaine	14	suppressed
Myrbetriq	Mirabegron	14	suppressed
Diclofenac Sodium	Diclofenac Sodium	13	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	13	11
Entresto	Sacubitril/Valsartan	13	suppressed
Meclizine Hcl	Meclizine Hcl	13	suppressed
Nitroglycerin	Nitroglycerin	13	11
Nystatin-Triamcinolone	Nystatin/Triamcinolone Acet	13	suppressed
Risperidone	Risperidone	13	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	12	12
Carisoprodol	Carisoprodol	12	suppressed
Celecoxib	Celecoxib	12	suppressed
Glipizide Er	Glipizide	12	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	12	suppressed
Ipratropium Bromide	Ipratropium Bromide	12	suppressed
Pentoxifylline	Pentoxifylline	12	suppressed
Prazosin Hcl	Prazosin Hcl	12	suppressed
Probenecid	Probenecid	12	suppressed
Spiriva Handihaler	Tiotropium Bromide	12	suppressed
Synthroid	Levothyroxine Sodium	12	suppressed
Ketoconazole	Ketoconazole	11	suppressed
Levocetirizine Dihydrochloride	Levocetirizine Dihydrochloride	11	suppressed
Nyamyc	Nystatin	11	suppressed
Olmesartan Medoxomil	Olmesartan Medoxomil	11	suppressed
Promethazine Hcl	Promethazine Hcl	11	suppressed
Valacyclovir	Valacyclovir 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