RxDoctor Payments Data

Zarema Singson, MD

Gastroenterology · San Antonio, TXNPI 1003068008

Payments from drug & device makers

$2,849in general payments, 2019–2025

Across 181 payments — averaging $15.74 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.

  • AbbVie$1K
  • Johnson & Johnson$418
  • Pfizer$378
  • Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$183
  • Ardelyx, Inc.$147
  • Bristol Myers Squibb$117
  • plus $337 from 12 others

What the payments were for

  • Speaking & faculty fees$2148%
  • Food & beverage$2,53589%
  • Education$1004%

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

19
20
21
22
23
24
25

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.

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

$2,849 in reported general payments places this provider in the 45th percentile of 1,350 gastroenterology providers in Texas.

See all gastroenterology providers in Texas

Medicare billing

Part B allowed, 2024
$136,201
Medicare patients
445
Services billed
2,453

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

DrugClaimsCost to plans & patients
LinzessLinaclotide83$73,034
PlenvuPeg3350/Sod Sul/Nacl/Kcl/Asb/C79$10,714
DexilantDexlansoprazole17$7,829
Mesalamine12$6,252
TrulancePlecanatide11$6,114
MovantikNaloxegol Oxalate12$5,329
SuflavePeg 3350/Sod Sulf,chlr/Pot/Mag42$5,239
ClenpiqSod Picosulf/Mag Ox/Citric Ac30$4,933
Ursodiol13$4,113
Colestipol Hcl31$2,690
SutabSod Sulf/Pot Chloride/Mag Sulf14$2,255
Omeprazole140$2,103
Peg-3350 And ElectrolytesPeg3350/Sod Sulf,bicarb,cl/Kcl126$1,964
Pantoprazole Sodium205$1,728
Esomeprazole Magnesium71$1,649

Paid to pharmacies, not to this prescriber.

Companies that both paid and supply prescribed drugs

These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.

CompanyPaid to this providerPart D cost of their drugs
AbbVieLinzess$1,269$73,03483 claims
Salix Pharmaceuticals, A Division Of Bausch Health US, LLCPlenvu, Trulance$183$16,82890 claims
Takeda Pharmaceuticals U.S.A., Inc.Dexilant$100$7,82917 claims

Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 45th percentile of 1,350 gastroenterology providers in Texas.

Other gastroenterology in San Antonio

See the full list for Texas

Where these figures come from

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