Design
Hospital Appointment Scheduling System
Design a system for scheduling patient appointments with doctors, considering availability, specialties, and rescheduling.
This is a Low-Level Design (LLD) problem. New to LLD vs HLD? Start here.
01 - Why interviewers ask this
Healthcare scheduling adds real-world constraints (specialties, recurring visits) on top of basic interval scheduling — interviewers check if your design generalizes past a single doctor's calendar.
02 - Where this system exists in the real world
You interact with this design every day.
Practo / Zocdoc-style appointment platforms
Hospital and clinic scheduling systems
Telemedicine consultation booking
03 - What you'll master
Solve this once. Know it forever.
Search availability by specialty and location
Prevent double-booking with strong consistency
Model recurring appointment schedules
04 - What you'll design
6 functional · 2 non-functional requirements.
Search doctors by specialty, location, and availability
5 more requirements inside
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05 - Companies that ask this
You may face this exact question in your next interview.
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