Online appointment booking with real-time slot availability pulled from your scheduling system via HL7 FHIR Schedule and Slot resources (Epic FHIR R4 API, Cerner FHIR R4 API, Athenahealth API), eliminating the phone call to check availability and the double-booking that results from manual scheduling in multiple places. Appointment types configured per provider type and care setting: new patient consultations (with longer booking windows and intake form requirements), follow-up appointments (shorter duration, automatically suggested for existing patients based on care plan schedules), specialist referral slots (restricted to referred patients with validated referral codes), and urgent care slots (same-day availability with different workflow). Automated reminder sequence delivered via SMS (Twilio) and email (SendGrid) at 72 hours, 24 hours, and 2 hours before the appointment, with a one-click confirmation link that updates the appointment status in your scheduling system without the patient needing to log into the portal. Self-service rescheduling and cancellation with configurable policies: a cancellation within 24 hours can trigger a late cancellation fee notification or simply return the slot to availability depending on your practice policy. Pre-visit digital intake forms displayed to the patient in the portal after booking: demographics update, insurance information, reason for visit, symptom description, medication list review, and consent form e-signature. Completed intake data written back to the EMR via FHIR QuestionnaireResponse or a structured HL7 message before the appointment so the clinician sees completed intake on their schedule view, not a blank intake form. Practices that implement online booking with automated reminders and digital intake typically report 25-40% reduction in no-show rates and a significant reduction in front-desk phone volume for administrative scheduling calls.