Healthcare provider profile · identity verified

Darrell R Pietsch, M.D.

Family Practice · WACO, TX · NPI 1780689992

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	938	210
Furosemide	Furosemide	693	140
Donepezil Hcl	Donepezil Hcl	667	94
Amlodipine Besylate	Amlodipine Besylate	658	150
Levothyroxine Sodium	Levothyroxine Sodium	658	133
Gabapentin	Gabapentin	601	112
Potassium Chloride	Potassium Chloride	540	104
Trazodone Hcl	Trazodone Hcl	426	64
Memantine Hcl	Memantine Hcl	411	60
Metoprolol Tartrate	Metoprolol Tartrate	390	78
Lisinopril	Lisinopril	376	68
Pantoprazole Sodium	Pantoprazole Sodium	362	122
Mirtazapine	Mirtazapine	361	73
Eliquis	Apixaban	334	80
Sertraline Hcl	Sertraline Hcl	289	48
Clopidogrel	Clopidogrel Bisulfate	265	56
Fluoxetine Hcl	Fluoxetine Hcl	261	40
Losartan Potassium	Losartan Potassium	259	66
Famotidine	Famotidine	253	35
Tramadol Hcl	Tramadol Hcl	239	78
Escitalopram Oxalate	Escitalopram Oxalate	224	41
Carvedilol	Carvedilol	222	55
Tamsulosin Hcl	Tamsulosin Hcl	215	54
Metoprolol Succinate	Metoprolol Succinate	209	57
Buspirone Hcl	Buspirone Hcl	205	39
Metformin Hcl	Metformin Hcl	197	48
Duloxetine Hcl	Duloxetine Hcl	193	46
Spironolactone	Spironolactone	184	36
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	176	40
Simvastatin	Simvastatin	175	20
Divalproex Sodium	Divalproex Sodium	170	35
Levetiracetam	Levetiracetam	151	25
Montelukast Sodium	Montelukast Sodium	148	31
Paroxetine Hcl	Paroxetine Hcl	145	22
Latanoprost	Latanoprost	140	26
Alendronate Sodium	Alendronate Sodium	137	24
Omeprazole	Omeprazole	136	34
Bupropion Xl	Bupropion Hcl	128	22
Carbidopa-Levodopa	Carbidopa/Levodopa	121	20
Fluticasone Propionate	Fluticasone Propionate	120	39
Hydrochlorothiazide	Hydrochlorothiazide	119	38
Pravastatin Sodium	Pravastatin Sodium	115	32
Digoxin	Digoxin	114	16
Aripiprazole	Aripiprazole	113	14
Gemtesa	Vibegron	111	13
Quetiapine Fumarate	Quetiapine Fumarate	109	20
Torsemide	Torsemide	102	25
Lorazepam	Lorazepam	99	24
Venlafaxine Hcl Er	Venlafaxine Hcl	97	suppressed
Lantus	Insulin Glargine,hum.Rec.Anlog	95	20
Amiodarone Hcl	Amiodarone Hcl	92	28
Meloxicam	Meloxicam	90	14
Albuterol Sulfate Hfa	Albuterol Sulfate	89	37
Olanzapine	Olanzapine	89	13
Prednisone	Prednisone	87	37
Nifedipine Er	Nifedipine	86	19
Hydralazine Hcl	Hydralazine Hcl	81	23
Methocarbamol	Methocarbamol	79	16
Hydroxyzine Hcl	Hydroxyzine Hcl	78	21
Ropinirole Hcl	Ropinirole Hcl	74	17
Hydroxyzine Pamoate	Hydroxyzine Pamoate	71	38
Rosuvastatin Calcium	Rosuvastatin Calcium	71	17
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	70	13
Xarelto	Rivaroxaban	70	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	68	44
Albuterol Sulfate	Albuterol Sulfate	67	34
Jardiance	Empagliflozin	67	19
Cephalexin	Cephalexin	65	31
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	64	23
Midodrine Hcl	Midodrine Hcl	63	19
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	62	suppressed
Allopurinol	Allopurinol	61	23
Citalopram Hbr	Citalopram Hydrobromide	57	14
Myrbetriq	Mirabegron	57	14
Tizanidine Hcl	Tizanidine Hcl	54	14
Ciprofloxacin Hcl	Ciprofloxacin Hcl	53	37
Humalog	Insulin Lispro	49	14
Januvia	Sitagliptin Phosphate	49	suppressed
Risperidone	Risperidone	48	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	47	27
Clonazepam	Clonazepam	47	11
Warfarin Sodium	Warfarin Sodium	47	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	46	36
Esomeprazole Magnesium	Esomeprazole Magnesium	46	suppressed
Novolog	Insulin Aspart	45	13
Levofloxacin	Levofloxacin	43	24
Memantine Hcl Er	Memantine Hcl	42	suppressed
Carbidopa-Levodopa Er	Carbidopa/Levodopa	41	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	41	12
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	40	31
Ondansetron Hcl	Ondansetron Hcl	40	34
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	40	suppressed
Venlafaxine Hcl	Venlafaxine Hcl	40	suppressed
Pregabalin	Pregabalin	39	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	39	17
Oxcarbazepine	Oxcarbazepine	38	suppressed
Finasteride	Finasteride	37	11
Isosorbide Mononitrate Er	Isosorbide Mononitrate	36	13
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	36	16
Baclofen	Baclofen	35	suppressed
Metformin Hcl Er	Metformin Hcl	35	13
Novolog Flexpen	Insulin Aspart	35	suppressed
Ezetimibe	Ezetimibe	34	suppressed
Nystatin	Nystatin	34	22
Propranolol Hcl	Propranolol Hcl	34	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	34	23
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	34	11
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	33	11
Glipizide	Glipizide	33	suppressed
Ipratropium-Albuterol	Ipratropium/Albuterol Sulfate	33	21
Primidone	Primidone	33	suppressed
Timolol Maleate	Timolol Maleate	33	suppressed
Divalproex Sodium Er	Divalproex Sodium	32	suppressed
Sucralfate	Sucralfate	32	suppressed
Bupropion Hcl Sr	Bupropion Hcl	31	suppressed
Lamotrigine	Lamotrigine	31	suppressed
Diltiazem Hcl	Diltiazem Hcl	30	suppressed
Entresto	Sacubitril/Valsartan	30	suppressed
Ondansetron Odt	Ondansetron	30	26
Cefuroxime	Cefuroxime Axetil	29	19
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	29	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	28	suppressed
Folic Acid	Folic Acid	28	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	28	suppressed
Clindamycin Hcl	Clindamycin Hcl	27	11
Dicyclomine Hcl	Dicyclomine Hcl	27	suppressed
Dorzolamide-Timolol	Dorzolamide Hcl/Timolol Maleat	27	suppressed
Ramelteon	Ramelteon	27	suppressed
Incruse Ellipta	Umeclidinium Bromide	26	suppressed
Budesonide	Budesonide	25	suppressed
Farxiga	Dapagliflozin Propanediol	24	suppressed
Fentanyl	Fentanyl	24	suppressed
Insulin Glargine-Yfgn	Insulin Glargine-Yfgn	24	12
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	24	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	24	suppressed
Nystatin-Triamcinolone	Nystatin/Triamcinolone Acet	24	suppressed
Valacyclovir	Valacyclovir Hcl	24	suppressed
Valsartan	Valsartan	24	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	23	suppressed
Clonidine Hcl	Clonidine Hcl	23	17
Labetalol Hcl	Labetalol Hcl	23	suppressed
Lactulose	Lactulose	23	14
Meclizine Hcl	Meclizine Hcl	23	suppressed
Mupirocin	Mupirocin	23	11
Atenolol	Atenolol	22	suppressed
Brimonidine Tartrate	Brimonidine Tartrate	22	suppressed
Lumigan	Bimatoprost	22	suppressed
Phenytoin Sodium Extended	Phenytoin Sodium Extended	22	suppressed
Sotalol	Sotalol Hcl	22	suppressed
Cholestyramine	Cholestyramine (With Sugar)	21	suppressed
Humalog Kwikpen U-100	Insulin Lispro	21	suppressed
Ozempic	Semaglutide	21	suppressed
Rivastigmine	Rivastigmine Tartrate	21	suppressed
Santyl	Collagenase Clostridium Hist.	21	suppressed
Cefdinir	Cefdinir	20	12
Cinacalcet Hcl	Cinacalcet Hcl	20	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	20	suppressed
Insulin Lispro	Insulin Lispro	20	suppressed
Ketoconazole	Ketoconazole	20	suppressed
Rytary	Carbidopa/Levodopa	20	suppressed
Trulicity	Dulaglutide	20	suppressed
Xtampza Er	Oxycodone Myristate	20	suppressed
Amantadine	Amantadine Hcl	19	suppressed
Celecoxib	Celecoxib	19	suppressed
Diltiazem 24hr Er (La)	Diltiazem Hcl	19	suppressed
Estradiol	Estradiol	19	suppressed
Fiasp Flextouch	Insulin Aspart (Niacinamide)	19	suppressed
Teflaro	Ceftaroline Fosamil Acetate	19	suppressed
Azithromycin	Azithromycin	18	13
Fenofibrate	Fenofibrate Nanocrystallized	18	suppressed
Klayesta	Nystatin	18	suppressed
Metolazone	Metolazone	18	suppressed
Sodium Chloride	0.9 % Sodium Chloride	18	suppressed
Benztropine Mesylate	Benztropine Mesylate	17	suppressed
Metoclopramide Hcl	Metoclopramide Hcl	17	suppressed
Victoza 3-Pak	Liraglutide	17	suppressed
Ziprasidone Hcl	Ziprasidone Hcl	17	suppressed
Acetazolamide	Acetazolamide	16	suppressed
Admelog	Insulin Lispro	16	suppressed
Diazepam	Diazepam	16	suppressed
Diclofenac Sodium	Diclofenac Sodium	16	suppressed
Hydroxychloroquine Sulfate	Hydroxychloroquine Sulfate	16	suppressed
Ibuprofen	Ibuprofen	16	12
Valproic Acid	Valproic Acid (As Sodium Salt)	16	suppressed
Acyclovir	Acyclovir	15	suppressed
Alprazolam	Alprazolam	15	suppressed
Amoxicillin	Amoxicillin	15	suppressed
Brilinta	Ticagrelor	15	suppressed
Clobetasol Propionate	Clobetasol Propionate	15	suppressed
Flecainide Acetate	Flecainide Acetate	15	suppressed
Nebivolol Hcl	Nebivolol Hcl	15	suppressed
Ceftriaxone	Ceftriaxone Sodium	14	11
Diltiazem 24hr Er	Diltiazem Hcl	14	suppressed
Entacapone	Entacapone	14	suppressed
Glipizide Er	Glipizide	14	suppressed
Glyburide-Metformin Hcl	Glyburide/Metformin Hcl	14	suppressed
Ingrezza	Valbenazine Tosylate	14	suppressed
Lagevrio (Eua)	Molnupiravir	14	14
Nitroglycerin	Nitroglycerin	14	14
Prednisolone Acetate	Prednisolone Acetate	14	suppressed
Scopolamine	Scopolamine	14	suppressed
Topiramate	Topiramate	14	suppressed
Toujeo Solostar	Insulin Glargine,hum.Rec.Anlog	14	suppressed
Tresiba Flextouch U-100	Insulin Degludec	14	suppressed
Breo Ellipta	Fluticasone/Vilanterol	13	suppressed
Cimetidine	Cimetidine	13	suppressed
Colesevelam Hcl	Colesevelam Hcl	13	suppressed
Desvenlafaxine Succinate Er	Desvenlafaxine Succinate	13	suppressed
Diphenoxylate-Atropine	Diphenoxylate Hcl/Atropine	13	suppressed
Fenofibrate	Fenofibrate	13	suppressed
Leflunomide	Leflunomide	13	suppressed
Levemir	Insulin Detemir	13	suppressed
Mexiletine Hcl	Mexiletine Hcl	13	suppressed
Multaq	Dronedarone Hcl	13	suppressed
Terazosin Hcl	Terazosin Hcl	13	suppressed
Tolterodine Tartrate	Tolterodine Tartrate	13	suppressed
Bumetanide	Bumetanide	12	suppressed
Cefadroxil	Cefadroxil	12	suppressed
Clozapine	Clozapine	12	suppressed
Fiasp	Insulin Aspart (Niacinamide)	12	suppressed
Fluconazole	Fluconazole	12	suppressed
Hydrocortisone	Hydrocortisone	12	suppressed
Lidocaine	Lidocaine	12	suppressed
Phenobarbital	Phenobarbital	12	suppressed
Tadalafil	Tadalafil	12	suppressed
Arnuity Ellipta	Fluticasone Furoate	11	suppressed
Azelastine-Fluticasone	Azelastine/Fluticasone	11	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	11	suppressed
Gentamicin Sulfate	Gentamicin Sulfate	11	suppressed
Mounjaro	Tirzepatide	11	suppressed
Naproxen	Naproxen	11	suppressed
Nuplazid	Pimavanserin Tartrate	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