How to Edit Medical ID on iPhone: A Complete Guide
Your iPhone's Medical ID is one of the most important features you might never think about — until it matters. Tucked inside the Health app, it stores critical information that first responders can access directly from your lock screen, no passcode required. Keeping it accurate could make a real difference in an emergency.
Here's exactly how to find, edit, and optimize your Medical ID.
What Is Medical ID on iPhone?
Medical ID is a profile within Apple's Health app that stores personal health information including:
- Name and date of birth
- Medical conditions (allergies, chronic illnesses, disabilities)
- Current medications (with dosage if needed)
- Blood type
- Emergency contacts
- Organ donor status
- Weight and height
- Medical notes (anything else first responders should know)
The key feature: this information is accessible from the lock screen by tapping Emergency → Medical ID, even without unlocking the phone. First responders, paramedics, and ER staff are trained to look for this.
How to Edit Your Medical ID on iPhone
Step 1: Open the Health App
Find the Health app on your iPhone — it has a white icon with a red heart. This app comes pre-installed on every iPhone running iOS 8 or later and cannot be deleted.
Step 2: Tap Your Profile Icon
In the top-right corner of the Health app's Summary screen, tap your profile picture or initials. This opens your account and settings area.
Step 3: Select Medical ID
From the menu that appears, tap Medical ID. If you've never set one up, you'll see a prompt to create one. If you already have one, your existing information will display.
Step 4: Tap Edit
In the top-right corner of the Medical ID screen, tap Edit. Every field now becomes editable.
Step 5: Update Your Information
Scroll through and update whatever needs changing:
- Tap any text field to type or modify information
- Use the blood type picker to select from a dropdown
- Toggle organ donor status on or off
- Add or remove emergency contacts by tapping the red minus icon or the green plus icon
Step 6: Enable "Show When Locked" 🔒
Near the bottom of the edit screen, make sure the Show When Locked toggle is turned on. Without this enabled, your Medical ID can't be accessed from the lock screen — which defeats most of its purpose in an emergency.
Step 7: Tap Done
Tap Done in the top-right corner to save your changes. There's no separate confirmation screen — saving is immediate.
Alternative Access Methods
If you want to quickly check what your Medical ID shows from the lock screen without unlocking your phone:
- Wake your iPhone screen
- Swipe to the Emergency dialer (tap Emergency in the bottom-left of the passcode screen)
- Tap Medical ID in the bottom-left of that screen
This shows exactly what a first responder would see — useful for verifying your information looks correct.
What Information Actually Matters ⚕️
Not every field carries equal weight in an emergency. Here's a practical breakdown:
| Field | Emergency Relevance | Notes |
|---|---|---|
| Blood Type | High | Critical for transfusions |
| Allergies | High | Especially medication allergies |
| Current Medications | High | Prevents dangerous drug interactions |
| Medical Conditions | High | Affects treatment decisions |
| Emergency Contacts | High | Family notification |
| Organ Donor Status | Medium | Relevant in critical situations |
| Height/Weight | Low–Medium | Used for medication dosing |
| Notes | Varies | Use for anything not covered above |
Variables That Affect How Useful Your Medical ID Is
The Medical ID feature works the same way across iPhones running iOS 8 and later, but how useful it actually is depends on several factors specific to you:
Completeness of your information. A Medical ID with only your name does almost nothing. One with your blood type, allergy to penicillin, and a contact number for a family member is genuinely lifesaving.
How current it is. Medications change. Conditions develop. A Medical ID you set up three years ago and never updated may contain outdated or even misleading information. There's no automatic reminder to review it.
Your specific health profile. Someone with no known allergies, no chronic conditions, and no regular medications gets less practical benefit than someone managing diabetes, blood pressure medication, or a severe allergy. The feature scales in value with medical complexity.
Emergency contact accuracy. Phone numbers change. People move. An outdated emergency contact listed in your Medical ID may not reach anyone.
Whether Show When Locked is enabled. This single toggle determines whether the feature is actually useful in a real emergency scenario when your phone is locked.
iOS version. While core functionality is consistent, Apple has refined the Medical ID interface across iOS versions. Users on significantly older iOS versions may see a slightly different layout, though the fields themselves remain largely the same.
A Note on Privacy 🔐
Some people hesitate to fill out Medical ID because the information is visible without unlocking the phone. That's a deliberate design trade-off Apple made — emergency access requires bypassing the lock screen. The alternative is that first responders have no information at all.
You control exactly what appears. If you're uncomfortable listing a specific condition, you don't have to. Even a partial Medical ID — blood type and one emergency contact — is more useful than an empty one.
Whether a fully detailed Medical ID makes sense for you, or a more limited version, comes down to your own health situation, your comfort with that lock-screen visibility, and how you've set up the rest of your iPhone's security features.