Healthcare provider profile · identity verified

Darin G Blackburn, MD

Family Practice · PUYALLUP, WA · NPI 1629011010

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	305	95
Lisinopril	Lisinopril	209	62
Levothyroxine Sodium	Levothyroxine Sodium	190	56
Amlodipine Besylate	Amlodipine Besylate	176	53
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	162	23
Hydrochlorothiazide	Hydrochlorothiazide	145	45
Losartan Potassium	Losartan Potassium	142	46
Metoprolol Succinate	Metoprolol Succinate	142	45
Metformin Hcl	Metformin Hcl	132	42
Oxycodone Hcl	Oxycodone Hcl	130	24
Gabapentin	Gabapentin	121	38
Simvastatin	Simvastatin	116	32
Tamsulosin Hcl	Tamsulosin Hcl	114	36
Omeprazole	Omeprazole	96	34
Albuterol Sulfate Hfa	Albuterol Sulfate	94	34
Pantoprazole Sodium	Pantoprazole Sodium	94	30
Tramadol Hcl	Tramadol Hcl	89	17
Tizanidine Hcl	Tizanidine Hcl	88	35
Sertraline Hcl	Sertraline Hcl	71	21
Furosemide	Furosemide	67	26
Zolpidem Tartrate	Zolpidem Tartrate	67	16
Metoprolol Tartrate	Metoprolol Tartrate	61	20
Alprazolam	Alprazolam	60	19
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	59	17
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	59	19
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	58	16
Duloxetine Hcl	Duloxetine Hcl	56	17
Ondansetron Odt	Ondansetron	56	13
Meloxicam	Meloxicam	55	18
Rosuvastatin Calcium	Rosuvastatin Calcium	54	20
Citalopram Hbr	Citalopram Hydrobromide	52	15
Trazodone Hcl	Trazodone Hcl	50	15
Eliquis	Apixaban	47	11
Clonazepam	Clonazepam	45	suppressed
Diclofenac Sodium	Diclofenac Sodium	45	16
Ozempic	Semaglutide	45	suppressed
Donepezil Hcl	Donepezil Hcl	44	14
Fluticasone Propionate	Fluticasone Propionate	44	17
Potassium Chloride	Potassium Chloride	43	18
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	41	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	40	suppressed
Pregabalin	Pregabalin	37	suppressed
Carvedilol	Carvedilol	36	11
Farxiga	Dapagliflozin Propanediol	35	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	34	suppressed
Methocarbamol	Methocarbamol	34	suppressed
Montelukast Sodium	Montelukast Sodium	32	suppressed
Ropinirole Hcl	Ropinirole Hcl	32	suppressed
Allopurinol	Allopurinol	31	suppressed
Olmesartan Medoxomil	Olmesartan Medoxomil	31	suppressed
Prednisone	Prednisone	31	15
Famotidine	Famotidine	30	suppressed
Bupropion Hcl Sr	Bupropion Hcl	29	suppressed
Clopidogrel	Clopidogrel Bisulfate	29	11
Glipizide	Glipizide	29	suppressed
Bupropion Xl	Bupropion Hcl	28	suppressed
Metformin Hcl Er	Metformin Hcl	28	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	28	suppressed
Synthroid	Levothyroxine Sodium	28	suppressed
Alendronate Sodium	Alendronate Sodium	27	suppressed
Glipizide Er	Glipizide	27	suppressed
Acyclovir	Acyclovir	26	suppressed
Finasteride	Finasteride	26	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	26	11
Pravastatin Sodium	Pravastatin Sodium	26	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	26	18
Hydroxyzine Hcl	Hydroxyzine Hcl	24	suppressed
Atenolol	Atenolol	23	suppressed
Januvia	Sitagliptin Phosphate	23	suppressed
Lorazepam	Lorazepam	23	suppressed
Prempro	Estrogen,con/M-Progest Acet	23	suppressed
Spironolactone	Spironolactone	22	suppressed
Warfarin Sodium	Warfarin Sodium	22	suppressed
Butalbital-Acetaminophen-Caffe	Butalb/Acetaminophen/Caffeine	21	suppressed
Baclofen	Baclofen	20	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	20	suppressed
Buspirone Hcl	Buspirone Hcl	19	suppressed
Hydralazine Hcl	Hydralazine Hcl	19	suppressed
Propranolol Hcl	Propranolol Hcl	19	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	19	suppressed
Bisoprolol-Hydrochlorothiazide	Bisoprolol/Hydrochlorothiazide	18	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	18	suppressed
Jardiance	Empagliflozin	18	suppressed
Morphine Sulfate Er	Morphine Sulfate	18	suppressed
Xarelto	Rivaroxaban	18	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	17	suppressed
Paroxetine Hcl	Paroxetine Hcl	17	suppressed
Celecoxib	Celecoxib	16	suppressed
Ondansetron Hcl	Ondansetron Hcl	16	suppressed
Rexulti	Brexpiprazole	16	suppressed
Cephalexin	Cephalexin	15	suppressed
Fluconazole	Fluconazole	15	suppressed
Levetiracetam	Levetiracetam	15	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	15	suppressed
Olanzapine	Olanzapine	15	suppressed
Eszopiclone	Eszopiclone	14	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	14	suppressed
Rizatriptan	Rizatriptan Benzoate	14	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	14	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	13	suppressed
Dextroamphetamine-Amphet Er	Dextroamphetamine/Amphetamine	13	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	13	suppressed
Ibu	Ibuprofen	13	suppressed
Novolin N	Insulin Nph Human Isophane	13	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	13	suppressed
Temazepam	Temazepam	13	suppressed
Tresiba Flextouch U-100	Insulin Degludec	13	suppressed
Ultra-Fine Short Pen Needle	Pen Needle, Diabetic	13	suppressed
Clonidine Hcl	Clonidine Hcl	12	suppressed
Clotrimazole	Clotrimazole	12	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	12	suppressed
Estradiol	Estradiol	12	suppressed
Mounjaro	Tirzepatide	12	suppressed
Olmesartan-Hydrochlorothiazide	Olmesartan/Hydrochlorothiazide	12	suppressed
Risperidone	Risperidone	12	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	11	suppressed
Fenofibrate	Fenofibrate,micronized	11	suppressed
Glyburide	Glyburide	11	suppressed
Linzess	Linaclotide	11	suppressed
Meclizine Hcl	Meclizine Hcl	11	suppressed
Methylphenidate Hcl	Methylphenidate 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