Healthcare provider profile · identity verified

C. Roger Turk, MD

Family Practice · SANTA ROSA, CA · NPI 1063564870

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	831	286
Lisinopril	Lisinopril	427	145
Levothyroxine Sodium	Levothyroxine Sodium	376	111
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	369	69
Losartan Potassium	Losartan Potassium	317	114
Amlodipine Besylate	Amlodipine Besylate	315	108
Tamsulosin Hcl	Tamsulosin Hcl	285	101
Albuterol Sulfate Hfa	Albuterol Sulfate	277	134
Hydrochlorothiazide	Hydrochlorothiazide	241	88
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	217	71
Atenolol	Atenolol	207	60
Gabapentin	Gabapentin	198	61
Pantoprazole Sodium	Pantoprazole Sodium	187	75
Prednisone	Prednisone	186	103
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	172	23
Trazodone Hcl	Trazodone Hcl	168	59
Metoprolol Tartrate	Metoprolol Tartrate	162	58
Metformin Hcl Er	Metformin Hcl	152	56
Omeprazole	Omeprazole	152	61
Fluticasone Propionate	Fluticasone Propionate	144	46
Terazosin Hcl	Terazosin Hcl	123	38
Ibuprofen	Ibuprofen	120	55
Lorazepam	Lorazepam	120	48
Famotidine	Famotidine	114	47
Furosemide	Furosemide	113	47
Allopurinol	Allopurinol	108	40
Mirtazapine	Mirtazapine	108	46
Pradaxa	Dabigatran Etexilate Mesylate	105	38
Triamcinolone Acetonide	Triamcinolone Acetonide	104	50
Metoprolol Succinate	Metoprolol Succinate	94	32
Breyna	Budesonide/Formoterol Fumarate	93	39
Glipizide	Glipizide	93	34
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	91	32
Bisoprolol Fumarate	Bisoprolol Fumarate	89	34
Metformin Hcl	Metformin Hcl	89	36
Potassium Chloride	Potassium Chloride	81	34
Alvesco	Ciclesonide	79	34
Spironolactone	Spironolactone	79	31
Bupropion Xl	Bupropion Hcl	78	29
Fluoxetine Hcl	Fluoxetine Hcl	78	24
Alendronate Sodium	Alendronate Sodium	76	26
Simvastatin	Simvastatin	75	27
Meloxicam	Meloxicam	73	25
Tramadol Hcl	Tramadol Hcl	70	15
Duloxetine Hcl	Duloxetine Hcl	69	31
Wixela Inhub	Fluticasone Propion/Salmeterol	68	23
Oxycodone Hcl	Oxycodone Hcl	66	24
Temazepam	Temazepam	63	17
Zolpidem Tartrate	Zolpidem Tartrate	59	18
Escitalopram Oxalate	Escitalopram Oxalate	56	18
Lovastatin	Lovastatin	56	18
Ozempic	Semaglutide	55	suppressed
Finasteride	Finasteride	53	18
Acyclovir	Acyclovir	52	25
Rosuvastatin Calcium	Rosuvastatin Calcium	52	20
Clobetasol Propionate	Clobetasol Propionate	51	29
Sertraline Hcl	Sertraline Hcl	49	20
Citalopram Hbr	Citalopram Hydrobromide	48	13
Lactulose	Lactulose	48	14
Metronidazole	Metronidazole	48	30
Jardiance	Empagliflozin	47	21
Morphine Sulfate Er	Morphine Sulfate	46	suppressed
Spiriva Respimat	Tiotropium Bromide	45	14
Cephalexin	Cephalexin	42	31
Clopidogrel	Clopidogrel Bisulfate	42	14
Amoxicillin	Amoxicillin	41	25
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	41	12
Belbuca	Buprenorphine Hcl	40	suppressed
Hydrocortisone	Hydrocortisone	40	13
Doxycycline Monohydrate	Doxycycline Monohydrate	39	29
Isosorbide Mononitrate Er	Isosorbide Mononitrate	38	14
Morphine Sulfate	Morphine Sulfate	38	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	37	12
Carvedilol	Carvedilol	36	12
Montelukast Sodium	Montelukast Sodium	36	13
Eliquis	Apixaban	35	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	35	14
Cefadroxil	Cefadroxil	34	31
Ropinirole Hcl	Ropinirole Hcl	34	suppressed
Humulin N	Insulin Nph Human Isophane	30	15
Methocarbamol	Methocarbamol	30	suppressed
Minoxidil	Minoxidil	30	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	29	29
Bupropion Hcl Sr	Bupropion Hcl	28	suppressed
Digoxin	Digoxin	28	suppressed
Azithromycin	Azithromycin	27	20
Cefpodoxime Proxetil	Cefpodoxime Proxetil	27	26
Clonazepam	Clonazepam	27	suppressed
Hydralazine Hcl	Hydralazine Hcl	27	12
Latanoprost	Latanoprost	27	suppressed
Adacel Tdap	Diph,pertuss(Acell),tet Vac/Pf	26	26
Biktarvy	Bictegrav/Emtricit/Tenofov Ala	24	suppressed
Nabumetone	Nabumetone	24	suppressed
Propranolol Hcl	Propranolol Hcl	24	11
Veo Insulin Syringe	Syringe-Needle,insulin,0.5 Ml	24	13
Fluocinolone Acetonide	Fluocinolone Acetonide	23	13
Pravastatin Sodium	Pravastatin Sodium	23	suppressed
Ondansetron Odt	Ondansetron	22	14
Divalproex Sodium	Divalproex Sodium	21	suppressed
Glipizide Er	Glipizide	21	suppressed
Lamotrigine	Lamotrigine	21	suppressed
Naproxen	Naproxen	21	suppressed
Topiramate	Topiramate	21	suppressed
Chlorthalidone	Chlorthalidone	20	suppressed
Midodrine Hcl	Midodrine Hcl	20	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	20	suppressed
Oxazepam	Oxazepam	20	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	19	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	19	suppressed
Celecoxib	Celecoxib	18	suppressed
Metoclopramide Hcl	Metoclopramide Hcl	18	suppressed
Neomycin-Polymyxin-Dexameth	Neomycin/Polymyxin B/Dexametha	18	17
Nystatin	Nystatin	18	suppressed
Warfarin Sodium	Warfarin Sodium	18	suppressed
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	17	suppressed
Insulin Glargine-Yfgn	Insulin Glargine-Yfgn	17	suppressed
Ondansetron Hcl	Ondansetron Hcl	17	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	16	13
Colchicine	Colchicine	16	suppressed
Ketoconazole	Ketoconazole	16	suppressed
Carbamazepine	Carbamazepine	15	suppressed
Chlorhexidine Gluconate	Chlorhexidine Gluconate	15	suppressed
Humulin N Kwikpen	Insulin Nph Human Isophane	15	suppressed
Levetiracetam	Levetiracetam	15	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	15	suppressed
Fluconazole	Fluconazole	14	suppressed
Methylphenidate Hcl	Methylphenidate Hcl	14	suppressed
Betamethasone Diprop Augmented	Betamethasone/Propylene Glyc	13	suppressed
Buprenorphine	Buprenorphine	13	suppressed
Cholestyramine	Cholestyramine (With Sugar)	13	suppressed
Memantine Hcl	Memantine Hcl	13	suppressed
Nifedipine Er	Nifedipine	13	suppressed
Octreotide Acetate	Octreotide Acetate	13	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	13	13
Terbinafine Hcl	Terbinafine Hcl	13	13
Buspirone Hcl	Buspirone Hcl	12	suppressed
Clonidine Hcl	Clonidine Hcl	12	suppressed
Dextroamphetamine-Amphet Er	Dextroamphetamine/Amphetamine	12	suppressed
Epinephrine	Epinephrine	12	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	12	suppressed
Dabigatran Etexilate	Dabigatran Etexilate Mesylate	11	suppressed
Erythromycin	Erythromycin Base In Ethanol	11	suppressed
Estradiol	Estradiol	11	suppressed
Mupirocin	Mupirocin	11	suppressed
Nitroglycerin	Nitroglycerin	11	suppressed
Risperidone	Risperidone	11	suppressed
Stiolto Respimat	Tiotropium Br/Olodaterol Hcl	11	suppressed
Tadalafil	Tadalafil	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