This is your periodic reminder to set up (or update) the Medical ID on your iPhone. I thought about it after my car accident last month and was surprised that it was pretty out of date.

(And tell your family. My parents had no idea it was a thing!)

https://support.apple.com/en-us/HT207021

Set up your Medical ID in the Health app on your iPhone

Medical ID helps first responders access your critical medical information from the Lock screen, without needing your passcode. They can see information like allergies and medical conditions as well as who to contact in case of an emergency. 

Apple Support
@ismh Funny you say that, I had a reminder on my iPhone for it today. Went through it and at the end iOS mentions that it’ll remind you about it in 6 months time. Neat!
@ismh no one seems to know it exists. I always wonder if anyone would ever check mine in the right situation.

@ismh https://support.google.com/android/answer/9319337?hl=en

And there is an android equivalent as well while we are at it.

Get help during an emergency with your Android phone - Android Help

You can use the Personal Safety app to save and share your emergency info. Your phone can also contact emergency services automatically in some countries and regions and with certain carriers.

@ismh Yas! I just updated mine the other day.
@ismh @siracusa Thanks very much! Mine was was outdated, too.