About Canybec Sulayman
Critical-care pattern recognition brought into psychiatric evaluation.
Canybec Sulayman, PMHNP, AGPCNP, built Diagnostic Psychiatry for cases where symptoms, labs, sleep, medications, screening scores, and timeline need to be held in the same differential.
The path here
Each phase added a different kind of diagnostic discipline.
This is not a founder myth. It is the reason the method insists on timeline, labs, medications, sleep, psychiatric screens, and medical routing before certainty.
Critical Care Foundation
19 years across 7 ICU specialties at Cedars-Sinai, USC Keck, and NY Presbyterian: medical, surgical, cardiac, neuro, trauma, burn, and respiratory ICU. Critical care trains pattern recognition because the wrong assumption can move fast.
"Measure the pattern before naming the problem."
UCLA Anderson MBA
Business training added systems thinking: how clinical judgment becomes a repeatable process, how workflows fail, and why good care needs structure around it.
"A method has to work outside one perfect appointment."
Health Samurai & FHIR
Healthcare technology work at Health Samurai sharpened the data layer: records, interoperability, structured information, and the difference between having data and making it clinically readable.
"Data is not useful until it changes the question."
Diagnostic Psychiatry
PMHNP and AGPCNP. Founded Horizon Peak Health to apply structured diagnostic reasoning to complex psychiatric presentations. The method asks what medical contributors may be causing, mimicking, or amplifying symptoms before calling a case purely psychiatric.
"Psychiatric symptoms need psychiatric care and medical context."
The methodology
Do not close the differential too early.
"I do not call it treatment resistant until I know what the body, medications, sleep, and timeline are doing."
Diagnostic Psychiatry is not a new medical specialty. It is a structured way to keep medical contributors in view when psychiatric symptoms do not make sense, do not respond, or keep returning.
The work is not to turn every lab into an explanation. The work is to decide what is psychiatric, what may be medical, what may be medication-related, what may be sleep-related, and what needs another clinician.
The gap
Psychiatry is strongest when the medical context is not missing.
- Symptoms are separated from labs and timeline.
- Medication history is reduced to a list of trials.
- Sleep and substances sit in the margin.
- Normal results end the conversation too soon.
- Referral questions are not named clearly.
- Symptoms, labs, sleep, medications, and timeline in one frame.
- Targeted testing when it can change management.
- A written psychiatric-medical differential.
- Clear routing to psychiatric care, primary care, specialty care, or monitoring.
- Guardrails against lab-only conclusions.
Learn the method before starting the review.
Read how Diagnostic Psychiatry connects psychiatric symptoms with medical context.