RangerLoop - Raj Singh

Half of imaging referrals never complete. RangerLoop is a closed-loop care-execution agent that finishes the job. It takes a signed imaging order, or an Abridge ambient encounter, and extracts the study and deadline, every field evidence-linked to the clinician's own words. Then it works the phones: it calls imaging centers one at a time until it finds a slot on or before the due date (striking out slots that are too late), then places a real, guardrailed voice call to the patient to verify identity and confirm - never disclosing clinical results - and books the appointment. It tracks each order ORDERED - SCHEDULED, and escalates safely to a human when it can't proceed. Claude Opus 4.8 is the visible orchestrator, deciding each next action via tool use with its reasoning streamed live; a thin deterministic policy layer validates every choice (the agent decides WHAT; the policy decides WHETHER), including a safety gate that blocks any booking without verified patient identity. Every record is FHIR-shaped (ServiceRequest / Patient / Task / Appointment), ready to write back to Epic or Oracle Health. Built entirely today; the voice/telephony stack is pre-existing infrastructure consumed over an HTTPS API only.

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