Patients don't all live in the same communication channel. A 25-year-old might never check SMS, while a 70-year-old might not use WhatsApp. The practices achieving the best engagement aren't choosing one channel. they're meeting each patient where they already are.
Channel Performance Data
Based on aggregated healthcare communication data across 10,000+ practices: WhatsApp achieves 98% delivery and 85% open rates within 5 minutes. SMS delivers 95% and gets 45% opens within an hour. Email reaches 99% deliverability but only 20-25% opens, often hours later. Push notifications from practice apps see 40-60% engagement but require app installation. a significant barrier. Phone calls have near-100% awareness but only 30% answer rates due to spam call fatigue.
Demographic Preferences
Under 35: WhatsApp dominant, resistant to phone calls, rarely checks SMS. Ages 35-55: Mixed preferences. WhatsApp and SMS both effective, email for detailed information. Over 55: SMS and phone calls preferred, WhatsApp adoption growing but not universal. These are generalizations; the best approach is asking patients their preference at registration and respecting that choice. A simple dropdown during onboarding ("How would you prefer we contact you?") transforms engagement rates.
Multi-Channel Strategy
The optimal approach uses a primary channel (patient's stated preference) with intelligent fallback. If a WhatsApp message isn't read within 4 hours before an appointment, escalate to SMS. If SMS isn't acknowledged for a critical message, trigger a phone call. This cascade ensures important communications reach patients regardless of their habits on any single day, without bombarding those who engaged on the first touch.
Cost Considerations
The ROI calculation should factor in not just message cost but engagement probability. A $0.05 WhatsApp message that gets read is infinitely better value than a $0.01 SMS that doesn't.
WhatsApp Business API charges per conversation (approximately $0.02-0.05 per conversation in most markets). SMS costs vary wildly by country. $0.01 in India to $0.10+ in the US/UK. Email is effectively free but has the lowest engagement. Phone calls cost $0.50-2.00 when staff time is factored in. The ROI calculation should factor in not just message cost but engagement probability. a $0.05 WhatsApp message that gets read is infinitely better value than a $0.01 SMS that doesn't.