Has Wirasat Hasnain, MD received payments from drug or device companies?

Yes. Drug and device makers reported $521 in general payments to Wirasat Hasnain, MD across 21 transactions between 2019–2025. Most Open Payments records nationally are meals worth under $20; a reported payment is not evidence of wrongdoing.

Does a payment mean Wirasat Hasnain, MD did something wrong?

No. Federal law requires drug and device makers to report almost every transfer of value to a physician, including a $14 sandwich at a lunch presentation. Consulting fees, research funding and royalties to device inventors are ordinary, legal parts of medicine. This site reports what was disclosed; it makes no allegation.

Where does this information about Wirasat Hasnain, MD come from?

The U.S. Centers for Medicare & Medicaid Services. Payments come from Open Payments, published under the Physician Payments Sunshine Act. Billing and prescribing figures come from the Medicare Physician & Other Practitioners and Part D Prescriber public use files for 2024.

Wirasat Hasnain, MD

Nephrology · Sherman, TXNPI 1679574891

Payments from drug & device makers

$521in general payments, 2019–2025

Across 21 payments — averaging $24.80 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.

Novartis$145
Bard Peripheral Vascular, Inc.$80
Vifor Pharma, Inc.$68
Mallinckrodt Hospital Products Inc.$35
Cardiovascular Systems Inc.$28
Travere Therapeutics, Inc.$25
plus $139 from 8 others

What the payments were for

Food & beverage$521100%

Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.

General payments by program year

Who reported the general payments

Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.

Company	Payments	Total
Novartis	6	$145
Bard Peripheral Vascular, Inc.	1	$80
Vifor Pharma, Inc.	3	$68
Mallinckrodt Hospital Products Inc.	1	$35
Cardiovascular Systems Inc.	1	$28
Travere Therapeutics, Inc.	1	$25
Fresenius USA Marketing, Inc.	1	$21
GSK	1	$21
Akebia Therapeutics Inc	1	$19
OPKO Pharmaceuticals, LLC	1	$18
AstraZeneca	1	$17
Ardelyx, Inc.	1	$16
Calliditas Therapeutics US Inc.	1	$14
Otsuka America Pharmaceutical, Inc.	1	$14

How this compares

$521 in reported general payments places this provider in the 25th percentile of 1,070 nephrology providers in Texas.

See all nephrology providers in Texas →

Medicare billing

Part B allowed, 2024

$278,005

Medicare patients

606

Services billed

3,767

What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.

Most prescribed under Part D

Drug	Claims	Cost to plans & patients
Sevelamer Carbonate	38	$3,265
Calcium Acetate	37	$2,105
Calcitriol	78	$1,206
Furosemide	185	$885
Bumetanide	19	$532
Potassium Chloride	61	$491
Amlodipine Besylate	105	$489
Lisinopril	68	$414
Cinacalcet Hcl	11	$395
Hydralazine Hcl	67	$380
Pantoprazole Sodium	25	$314
Losartan Potassium	26	$281
Torsemide	20	$260
Gabapentin	18	$232
Nifedipine ErNifedipine	18	$194

Paid to pharmacies, not to this prescriber.

Other nephrology in Sherman

Vinod PrasadSherman$301K
Pablo PergolaSan Antonio$14.2M
German HernandezEl Paso$9.7M
Sreedhar MandayamHouston$7M
Tahira AlvesSan Antonio$6.1M
Carl DukesSan Antonio$5.9M
Chinonye Ogbonnaya-OdorSan Antonio$4.6M
Marializa BernardoHouston$4.2M
Judith BettsAustin$3.7M
Wesley CalhounSan Antonio$3.5M

See the full list for Texas →

Where these figures come from

Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
Identity: NPPES NPI Registry, July 2026.

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