David Johnson is a Psychiatry physician. ClinicalTrials.gov lists 17 registered studies matched to this name.
Overview
Scholarship
indexed output and impact (OpenAlex)Research metrics aren't shown for this record. Either we found no confident publication match for this name, or more than one physician shares the matched author record. We'd rather show nothing than someone else's numbers. Why? →
Clinical & industry
trials, payments and federal fundingContact
The practice address and phone this provider lists in the federal NPPES (CMS) registry.
Practice address
311 W Rosewood Ave
San Antonio, TX 782122219
Telephone
210-394-0389Registry record last updated 8 Jul 2007.
Clinical trials
- Assessing Uniqueness of Inflammatory Bowel Disease Related Microbiome-derived Biomarkers
Sponsor: HyGIeaCare, Inc.
- INCremental Dialysis to Improve Health Outcomes in People Starting Haemodialysis (INCH-HD)
Sponsor: The University of Queensland
- Evaluation of Stool Microbiome Using HyGIeaCare Prep
Sponsor: HyGIeaCare, Inc.
Registered studies on ClinicalTrials.gov where the overall official or a site investigator name-matches this physician, confirmed against known institution/geography. Latest few shown; the full list is part of the full profile.
Industry payments
15 companies reported payments to CMS in program years 2021 onward. These are public disclosures, not judgments. The latest:
- Inari Medical, Inc.Program year20241 payment
- Teva Pharmaceuticals USA, Inc.Program year202310 payments
- ITI, Inc.Program year20238 payments
Payment records matched to this physician's NPI in CMS Open Payments, program years 2021 onward.
Medicare prescribing footprint (2024)
The drugs this prescriber writes for Medicare patients, grouped by drug class and therapeutic area. Every percentage is a share of their total prescribing, so you can see what they prescribe most. These are proportions, not patient counts or dollar amounts. No condition is inferred: the claims record what was prescribed, never why.
Nervous system
95.9%SSRI32.4%Trazodone Hcl41%Sertraline Hcl28%Citalopram Hbr16%Fluvoxamine Maleate11%Escitalopram Oxalate4%Part D<11 patientsAtypical Antipsychotic10.1%Quetiapine Fumarate39%Aripiprazole35%Olanzapine26%Part D<11 patients+ 12 more classes in this area
Genitourinary & hormones
4.1%Progestin4.1%Medroxyprogesterone Acetate100%Part D<11 patients
Drug classes come from the WHO ATC and U.S. National Library of Medicine (RxClass) classifications; prescribing counts come from the CMS Medicare Part D Prescribers file. Each drug is counted once, under its primary class. Medicare fee-for-service only, so no Medicare Advantage, commercial, or pediatric prescribing is included. CMS publishes this data about 17 months after the fact.
Similar KOLs
Other experts from the same institution or the same specialty.
Philip Scheltens
Inserm
Rafael Tabarés‐Seisdedos
Universitat de València
Nick C. Fox
UK Dementia Research Institute
Perminder S. Sachdev
Department of Health and Aged Care
A basic profile from our physician directory: identity and practice contact from the federal NPPES registry, research from OpenAlex, trials from ClinicalTrials.gov, payments from CMS Open Payments — shown itemized where we have matched records, as a count where we only have a total. This person hasn't been through our full identity-adjudication pipeline yet, so funding, congress activity and public presence aren't shown. Absence of a section means “not yet looked,” never “none found.”