Has Siamak Marzbani, MD received payments from drug or device companies?

Yes. Drug and device makers reported $7,763 in general payments to Siamak Marzbani, MD across 267 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 Siamak Marzbani, 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 Siamak Marzbani, 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.

Siamak Marzbani, MD

Obstetrics & Gynecology · Smithfield, NCNPI 1528169307

Payments from drug & device makers

$7,763in general payments, 2019–2025

Across 267 payments — averaging $29.07 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.

Intuitive Surgical$2K
Medical Device Business Services, Inc.$1K
AbbVie$922
Astellas Pharma US Inc$547
Daiichi Sankyo Inc.$279
Mayne Pharma Commercial LLC$240
plus $3K from 42 others

What the payments were for

Travel & lodging$2,76936%
Food & beverage$4,78362%
Education$2113%

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
Intuitive Surgical	16	$2,096
Medical Device Business Services, Inc.	7	$1,104
AbbVie(2 entities)	55	$922
Astellas Pharma US Inc	22	$547
Daiichi Sankyo Inc.	15	$279
Mayne Pharma Commercial LLC	12	$240
Novo Nordisk	14	$231
Therapeuticsmd, Inc.	8	$200
Pfizer	11	$193
Exeltis, USA Inc.	11	$184
Sage Therapeutics, LLC	8	$147
Lupin Inc.	8	$109
Agile Therapeutics, Inc.	6	$104
Lilly USA, LLC	6	$101
Organon	7	$94
Biogen	5	$90
Sumitomo Pharma America, Inc.	4	$85
Endo Pharmaceuticals Inc.	4	$77
Coopersurgical, Inc.	4	$75
Baxter Healthcare	4	$75
Myovant Sciences Inc.	3	$57
Takeda Pharmaceuticals U.S.A., Inc.	4	$54
Shield Therapeutics Inc	1	$53
Vertical Pharmaceuticals, LLC	3	$48
Applied Medical Resources Corporation	1	$41
LSI Solutions Inc	1	$41
Johnson & Johnson	1	$41
Coloplast	2	$36
Evofem Biosciences, Inc.	2	$35
Merck	2	$33
Currax Pharmaceuticals LLC	2	$30
Medtronic	1	$29
Dexcom, Inc.	1	$27
Mission Pharmacal Company	2	$26
Pharmacosmos Therapeutics Inc.	1	$23
Amgen	1	$22
Hologic Sales And Service, LLC	1	$22
Duchesnay USA Incorporated	1	$21
Scynexis, Inc.	1	$21
Pacira Pharmaceuticals Incorporated	1	$20
Avanos Medical	1	$20
Phadia US Inc.	1	$19
Bayer	1	$18
Aspira Women's Health Inc	1	$16
Mylan Pharmaceuticals Inc.	1	$15
Davol Inc.	1	$14
Avion Pharmaceuticals	1	$14
AMAG Pharmaceuticals, Inc.	1	$13

What the payments were tied to

Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.

How this compares

$7,763 in reported general payments places this provider in the 90th percentile of 1,344 obstetrics & gynecology providers in North Carolina.

See all obstetrics & gynecology providers in North Carolina →

Medicare billing

Part B allowed, 2024

$31,150

Medicare patients

115

Services billed

380

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
Estradiol	50	$2,161
DottiEstradiol	12	$740
Estradiol (Twice Weekly)Estradiol	11	$499
Norethindrone Acetate	16	$413
Clobetasol Propionate	19	$364
Medroxyprogesterone Acetate	21	$156
Metformin Hcl ErMetformin Hcl	11	$107
Levothyroxine Sodium	18	$97
Oxybutynin Chloride ErOxybutynin Chloride	18	$84
Oxybutynin Chloride	29	$49
ValacyclovirValacyclovir Hcl	11	$46

Paid to pharmacies, not to this prescriber.

Other obstetrics & gynecology in Smithfield

Laura McKainWilmington$2.6M
Robert ParkerWinston-Salem$2.1M
Allison PuechlCharlotte$1.6M
Jeffrey MichelsonNew Bern$1.2M
Robert LittletonRaleigh$976K
Donald HornerCharlotte$907K
Rebecca Dunsmoor SuMorrisville$837K
Ann CollinsRaleigh$701K
Kathryn PattenHendersonville$550K
Mohamad Mehdi ParvaElizabeth City$538K

See the full list for North Carolina →

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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