Ltrl

Find the doctors and researchers worth reading on a health question, follow their work, or book them directly. Ltrl is the health platform that connects every patient to the right provider — and makes both sides better with every interaction. For consumers, Ltrl is a personal medical assistant. Search a directory of every licensed U.S. healthcare provider, book appointments against your calendar, order lab tests at member pricing through Revelation Diagnostics, message your care team in one inbox, and track biomarkers longitudinally. AI coordinates the busywork — visit prep, follow-ups, care plan reminders — so nothing falls through the cracks. Your health data lives in one HIPAA-compliant vault that follows you across every provider relationship. For providers, Ltrl replaces the patchwork of scheduling, charting, billing, patient comms, and marketing tools with one integrated practice platform. Start free. Publish clinical perspectives that build authority and drive patient discovery. Every patient interaction on Ltrl compounds into richer profiles, better search visibility, and measurable growth — without extra admin effort. Built on a foundation of 4M+ NPI-verified provider records, real-time lab ordering, and an AI coordination layer, Ltrl is where healthcare administration finally gets out of the way.