Professional identity
Name, education, NPI, and clinical background are presented conservatively and linked to records where available.
Physician assistant · Allentown, Pennsylvania
Clinical experience. Clear language. Claims that can be checked.
Stephen McCarthy is a physician assistant with a clinical background in psychiatric care, addiction treatment, and inpatient and outpatient settings. This site shares his writing on psychiatric language and clinical reasoning.
Stephen McCarthyPhysician assistant and writer
A cleaner evidence trail
What this site will and will not claim
Licensure
Licensed in Pennsylvania and Utah.
No ornamental claims
No invented testimonials, ratings, patient totals, media coverage, awards, or unsupported certification claims.
Producer briefing · July 23, 2026
Mental Health Is the New Theology of the West
A source-led producer briefing on diagnostic reification, commercialized mental-health language, and the difference between describing distress and claiming to explain it.
Read the producer briefingFeatured writing · July 19, 2026
AuDHD, psychiatric ontology, and the difference between naming and explaining
A diagnosis can organize observations without explaining their cause. This essay examines AuDHD as shorthand, the difference between a syndrome and a pathogen, and the circularity that appears when a label is treated as the cause of the very symptoms used to assign it.
Read the essayA practical visual guide
Three jobs, not one shortcut.
Good clinical language starts by recording what is present. A category may then help organize that record, while explanation remains a separate question for evidence to answer.
See the distinction in the essay
Clinical reasoning
Three distinctions worth protecting
The goal is not to deny suffering. It is to keep description, classification, and causal explanation from melting into one word.
Describe before explaining
What is happening, when does it occur, how severe is it, and what function is impaired? Those questions come before the label.
Utility is not the same as validity
A diagnosis can help communication, access, and treatment planning without proving that it is a discrete disease entity.
A label is not its own mechanism
Causal claims need evidence beyond the criteria used to assign the diagnosis. Otherwise the explanation simply walks in a circle.
“A diagnostic label may be a useful map pin. It is not automatically a bacterium, lesion, or causal mechanism.”
The distinction matters because patients deserve language that clarifies what is known, what is inferred, and what remains uncertain.
About the approach