How to Set Up Medical ID and Emergency SOS on Apple Watch

Setting up Medical ID and Emergency SOS on your Apple Watch takes less than ten minutes, and it could matter more than any fitness feature on the device. Medical ID is created in the Health app on your paired iPhone and syncs to the watch automatically, while Emergency SOS is triggered by pressing and holding the watch’s side button. Together they let first responders see your allergies, medications, and emergency contacts — and let the watch call emergency services even when your iPhone isn’t nearby.

What you need before you start

• An Apple Watch paired with an iPhone and updated to a recent version of watchOS. If you haven’t paired yet, see our guide on how to set up an Apple Watch for the first time.
• The Health app and Watch app on your iPhone.
• A few minutes to gather your medical details: conditions, medications, allergies, blood type, and the phone numbers of one or two emergency contacts.

Step 1: Create your Medical ID on the iPhone

Medical ID lives in the Health app, not on the watch itself. Once saved, it syncs to the Apple Watch and can be shown from the lock screen of either device.

1. Open the Health app on your iPhone and tap your profile picture in the top-right corner.
2. Tap Medical ID, then Get Started (or Edit if one already exists).
3. Fill in medical conditions, allergies and reactions, medications, blood type, weight, and height. Be specific — “penicillin allergy, anaphylaxis” is far more useful to a responder than “allergies.”
4. Under Emergency Contacts, add one or more people from your contacts list and set their relationship to you.
5. Turn on Show When Locked so responders can view the ID without your passcode, and consider enabling Share During Emergency Call, which sends your Medical ID to emergency services in supported regions when you call.
6. Tap Done. The information syncs to your Apple Watch automatically.

Step 2: Check Emergency SOS settings on the watch

Emergency SOS is enabled by default, but two settings are worth confirming.

1. Open the Watch app on your iPhone and go to My Watch > Emergency SOS.
2. Decide whether to keep Hold Side Button to Dial on. With it enabled, holding the side button starts a countdown and then places the call; with it off, you must drag the SOS slider manually.
3. Confirm your emergency contacts are listed — they’re pulled from your Medical ID and will get a text with your location after an SOS call ends.

Step 3: Turn on Fall Detection and Crash Detection

These features can start an Emergency SOS call automatically if you’re unresponsive after a detected hard fall or severe car crash.

1. In the Watch app, go to My Watch > Emergency SOS.
2. Tap Fall Detection and switch it on. According to Apple, it’s on by default for users 55 and older and optional for ages 18–54; you can choose Always On or Only On During Workouts.
3. Crash Detection is available on Apple Watch Series 8 and later, SE (2nd generation), and Ultra models, and is enabled by default on supported hardware.

How Emergency SOS works when triggered

After the call ends, the watch texts your emergency contacts, shares your current location, and continues sending location updates for a period of time as it changes. On recent models with watchOS support, Emergency SOS via satellite extends this to areas without cellular or Wi-Fi coverage in supported regions, per Apple’s specifications.

Troubleshooting common setup problems

• Medical ID doesn’t appear on the watch: confirm it’s saved in the Health app and that both devices are updated, then restart the watch. Sync issues often trace back to Bluetooth — our Bluetooth connection fixes apply here.
• Accidental SOS calls: turn off Hold Side Button to Dial, or set Fall Detection to workouts only. If you trigger a countdown by mistake, release the button and tap to cancel; if the call connects, stay on the line and tell the dispatcher it was accidental.
• Emergency contacts missing: they must be added through Medical ID in the Health app, not the watch.

Frequently asked questions

Does Emergency SOS work without an iPhone nearby?

On cellular (GPS + Cellular) models, yes — the watch can place the call itself, even without an active plan in many regions, per Apple. GPS-only models need the paired iPhone in range or a previously joined Wi-Fi network with Wi-Fi Calling enabled.

Can first responders see my Medical ID on a locked watch?

Yes, if Show When Locked is enabled. Holding the side button brings up sliders that include Medical ID, so responders can view your conditions, medications, and contacts without a passcode.

Does Emergency SOS use my heart data?

No. SOS is triggered by the button, a detected fall, or a detected crash — not by heart readings. Heart-related notifications, such as irregular rhythm alerts, are a separate feature; see our article on whether a smartwatch can detect AFib for how those notifications work and their limits.

Does calling SOS abroad work?

Apple states that Emergency SOS reaches local emergency services in most regions when there’s cellular coverage, though some networks may require an active SIM or plan.

A note on health information

This article is general information based on Apple’s published documentation and is not medical advice. Emergency features may flag a possible problem or speed up a call for help, but they don’t diagnose, treat, or prevent any condition. Talk to a qualified healthcare professional about your medical needs and emergency planning, and always call emergency services directly in a crisis.

Sources

• Apple Watch — Apple (official product page)
• Apple Support (official documentation hub)
• U.S. Food and Drug Administration — Medical Devices
• American Heart Association — Health Topics