Has Alexander Chamessian, MD received payments from drug or device companies?

Yes. Drug and device makers reported $54,620 in general payments to Alexander Chamessian, MD across 84 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 Alexander Chamessian, 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 Alexander Chamessian, 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.

Alexander Chamessian, MD

Physical Medicine & Rehabilitation · Creve Coeur, MONPI 1275194839

Payments from drug & device makers

What this record shows

The money is spread across several categories — grants (29.3%), food and beverage and consulting fees — rather than concentrated in one kind of arrangement. 11 manufacturers reported payments, led by Boston Scientific at 26.0% of the total. 2025 is the largest year on record at $34,348, more than ten times the $154 reported in 2021. Among physical medicine & rehabilitation clinicians in MO with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.

$54,620in general payments, 2019–2025

Across 84 payments — averaging $650.24 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.

Boston Scientific$14K
Promega Corporation$12K
Pacira Pharmaceuticals Incorporated$10K
SPR Therapeutics, Inc$9K
Medtronic$6K
Abbott$3K
plus $511 from 5 others

$56,642in research payments, 2019–2025

Across 3 payments — averaging $18,881 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.

Vertex$57K

What the payments were for

Consulting fees$9,50017%
Grants$16,00029%
Travel & lodging$5,79011%
Food & beverage$14,83027%
Charitable contribution$8,50016%

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
Boston Scientific	23	$14,227
Promega Corporation	2	$11,565
Pacira Pharmaceuticals Incorporated	14	$10,483
SPR Therapeutics, Inc	6	$8,910
Medtronic	28	$6,336
Abbott	4	$2,587
Nalu Medical, Inc.	2	$175
Nevro Corp.	1	$145
Saluda Medical Americas, Inc.	1	$90
Averitas Pharma Inc.	2	$69
Vertex	1	$32

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

$54,620 in reported general payments places this provider in the 95th percentile of 182 physical medicine & rehabilitation providers in Missouri.

See all physical medicine & rehabilitation providers in Missouri →

Medicare billing

Part B allowed, 2024

$4,598

Medicare patients

Services billed

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
Gabapentin	143	$2,535
Baclofen	55	$1,461
Duloxetine Hcl	51	$1,158
Topiramate	17	$1,152
Tizanidine Hcl	51	$944
Celecoxib	35	$611
Methocarbamol	35	$438
Nortriptyline Hcl	19	$305
Ibuprofen	11	$297
Lamotrigine	12	$208
Cyclobenzaprine Hcl	15	$172
Meloxicam	16	$9

Paid to pharmacies, not to this prescriber.

Other physical medicine & rehabilitation in Creve Coeur

Lizette AlvarezSaint Louis$182K
Heidi HunterCape Girardeau$150K
Constantine FotopoulosKansas City$91K
Joseph BurrisColumbia$75K
Jane EmersonColumbia$44K
Reza FaridColumbia$37K
Nathan KenyonJefferson City$24K
Kunj PatelSaint Louis$17K
Vovanti JonesColumbia$9K
Tulsi PandatSaint Louis$8K

See the full list for Missouri →

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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