RxDoctor Payments Data

Alan Chapman, MD

Infectious Disease · Houston, TXNPI 1245239177

Payments from drug & device makers

$299in general payments, 2019–2025

Across 31 payments — averaging $9.64 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.

  • Gilead$144
  • Viiv Healthcare Company$36
  • Shionogi Inc$25
  • Boston Scientific$25
  • Novo Nordisk$25
  • AbbVie$22
  • plus $20 from 1 others

What the payments were for

  • Food & beverage$27391%
  • Education$259%

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

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.

How this compares

$299 in reported general payments places this provider in the 40th percentile of 576 infectious disease providers in Texas.

See all infectious disease providers in Texas

Medicare billing

Part B allowed, 2024
$172,921
Medicare patients
217
Services billed
1,887

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
Daptomycin429$796,628
BiktarvyBictegrav/Emtricit/Tenofov Ala85$350,124
ErtapenemErtapenem Sodium378$189,291
GenvoyaElviteg/Cob/Emtri/Tenof Alafen25$96,946
CompleraEmtricita/Rilpivirine/Tenof Df14$51,152
ZerbaxaCeftolozane/Tazobactam12$42,559
Meropenem97$22,399
Lopinavir-RitonavirLopinavir/Ritonavir17$19,510
Etravirine13$16,619
Cefepime Hcl70$15,623
MicafunginMicafungin Sodium37$8,699
Cefdinir175$5,869
Piperacillin-TazobactamPiperacillin Sodium/Tazobactam22$3,788
Vancomycin Hcl19$3,529
CeftriaxoneCeftriaxone Sodium55$3,434

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
GileadBiktarvy, Genvoya$144$447,070110 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 40th percentile of 576 infectious disease providers in Texas.

Other infectious disease in Houston

See the full list for Texas

Where these figures come from

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