What to Put on a Medical ID Card: Complete Checklist (2026)

A medical ID card has one job: tell a paramedic, ER nurse, or bystander the minimum information they need to treat you correctly in the first few minutes — before they have your records and before you can speak for yourself. Done well, that's a wallet-sized rectangle that prevents misdiagnoses, avoids dangerous drug interactions, and gives a responder one or two phone numbers that change everything.

The trouble is that the card is small. You can't list everything, and trying to do so produces a wall of text nobody reads. This guide covers what to include, how to phrase each entry to be useful, what to leave off, and where to keep the card so it's actually found in an emergency. It's based on what EMS personnel and ER staff in the US, UK, and Canada are trained to look for — not on a generic list-everything approach.

If you want to skip ahead, the free emergency card generator takes about three minutes and produces a wallet-size card and a fridge-size card from one form. Your data stays in your browser; nothing is uploaded.

The 12 essentials, in priority order

Order matters. The first lines should be what changes treatment fastest. Bury allergies under demographic data and you've hidden the most important field on the card.

1. Drug allergies (top of card, capital letters)

This is the most consequential field. Per Mayo Clinic, a drug allergy is an immune-system reaction — distinct from a side effect — that can escalate to anaphylaxis on re-exposure, which is why a single line on a wallet card can prevent a fatal ER mis-prescription. List the drug class plus the reaction if you know it — “PENICILLIN — HIVES” or “SULFA — ANAPHYLAXIS”. The reaction tells the responder how cautious to be when something similar is the obvious treatment. Common ones to think about:

• Penicillin and related beta-lactam antibiotics — the most common drug allergy. Many ER first-line antibiotics fall in this class.
• NSAIDs (aspirin, ibuprofen, naproxen) — affects pain control choices, especially after trauma.
• Sulfa drugs — in many antibiotics, diuretics, and a few diabetes medications.
• Contrast dye — used in CT scans and catheterization. Pre-medication is needed if you've reacted before.
• Latex — changes which gloves, catheters, and tubing the team uses.
• Specific opioids (e.g. morphine, codeine) — mention if you've had an actual allergy, not just nausea.

If you have no known drug allergies, write “NKDA” (No Known Drug Allergies) — EMS abbreviation that's instantly recognized and confirms you've thought about the question rather than left it blank.

2. Current medications with doses

List the meds the responder needs to know about, with dose and timing if relevant. Brand names are fine; generic names are slightly safer because they don't depend on local pharmacy stock. The FDA's guidance on drug interactions emphasises that a complete medication list — including OTCs and supplements — is the single biggest preventable cause of adverse drug events in the ER. The high-priority classes:

• Anticoagulants and antiplatelets — warfarin (with INR target), apixaban, rivaroxaban, dabigatran, clopidogrel, ticagrelor. These change every emergency-treatment decision involving bleeding, head injury, or surgery.
• Insulin and diabetes meds — type, dose, and regimen. “Lantus 20u QHS, Humalog with meals” tells the team you're a Type 1 patient on a basal-bolus pattern without spelling it out. The American Diabetes Association recommends carrying a list of all diabetes medications with doses and any pump/CGM details for exactly this reason.
• Beta-blockers and rate-control drugs — these mask the heart-rate response to shock, so the team needs to compensate.
• Anti-seizure medications — abrupt withdrawal can trigger seizures, so a long ER wait without a dose is risky.
• Steroids if you're on chronic dosing — stress-dose hydrocortisone may be needed.
• Immunosuppressants and chemotherapy agents — changes the workup for any infection.

Statins, vitamins, and routine blood-pressure pills can be summarized as “+ statin, lisinopril” rather than spelled out. The card has limited space; prioritize what changes the next 30 minutes of care.

3. Medical conditions / diagnoses

Be specific. “Heart problem” tells a responder nothing; “Coronary artery disease, 2 stents 2022” tells them to expect a possible cardiac event and what your anatomy looks like. Common conditions to spell out:

• Diabetes — Type 1 vs Type 2 matters; Type 1 patients can develop DKA quickly without insulin.
• Cardiac history — heart attack date, stents, bypass, atrial fibrillation, heart failure (with EF if you know it).
• Pacemaker or ICD — brand and implant date.
• Epilepsy or seizure disorder — type, frequency, and rescue medication if any (e.g. Valium for prolonged seizures).
• Asthma or COPD — whether you use a rescue inhaler and whether you've ever been intubated.
• Dementia or Alzheimer's — helps the responder understand confusion isn't new.
• Kidney disease or dialysis — with frequency and centre name if on dialysis.
• Recent surgery or procedure within the last 30 days.

4. Blood type

Include if you actually know it — from a real lab report or blood donation, not a guess. In a true mass-bleeding emergency, a known type can shave minutes off transfusion. If you don't know it for certain, leave the field blank rather than guess; the hospital will type-and-cross when you arrive, and a wrong listed type is worse than no listed type.

5. Full legal name

Use the name on your government ID and your medical records, not a nickname. If the name on the card matches the name in the hospital system, your chart appears in seconds; if it doesn't, staff lose time trying to disambiguate “Bob Smith” from “Robert Smith”.

6. Date of birth

Together with the name, this uniquely identifies you in most medical record systems. It also helps responders calibrate dose ranges (drug doses for an 85-year-old aren't the same as for a 35-year-old).

7. Two emergency contacts

At least two, with name, relationship, and a phone number. Choose people who:

• Will actually answer their phone — not a number that always rolls to voicemail.
• Know your medical history at the level needed to authorize care.
• Can act on the information — pick someone close enough to come in if needed.
• Have agreed in advance to be the contact — tell them.

Mark one as primary if there's a hierarchy. A line like “Sarah (wife) +1-415-555-0102 — primary” leaves no question.

8. Local emergency services number

The number to call for help in your country — 911 (US/Canada), 999 (UK), 1122 (Pakistan, Rescue), 112 (most of EU). Listing it on the fridge card especially helps a panicked family member or visitor who forgets.

Country-specific generators pre-fill these: UK, Canada, Pakistan.

9. Primary doctor or specialist

Your GP, primary care, or the specialist managing your main condition (cardiologist, endocrinologist, neurologist). When the ER calls them, they can read out a year of history in two minutes — far faster than ordering records. List name and clinic phone, not personal mobile.

10. Implanted devices

Pacemakers, ICDs, insulin pumps, CGMs, neurostimulators, drug pumps, cochlear implants. Brand, implant date, and where on the body. Many of these are MRI-conditional — the imaging team needs to know before powering up the magnet.

11. Health insurance / national health number

Insurance card number, Medicare/Medicaid ID, NHS Number, OHIP/MSP number, EHIC/GHIC, or whatever applies in your country. Speeds up admission and avoids a billing department interrupting the ER team later.

12. One-line treatment plan (if you have one)

For specific conditions, a single sentence about what to do can change the outcome. Examples:

• Diabetic on insulin: “If unconscious or seizing — treat as low blood sugar first (juice, glucagon).”
• Severe allergy: “Anaphylaxis to peanuts — EpiPen in left front pocket.”
• Adrenal insufficiency: “Stress-dose hydrocortisone 100mg IV in trauma.”

These should come from your treating physician — don't invent a protocol.

Optional but useful

Add these only if there's room and they apply:

• Organ donor status. A line like “Registered organ donor” matters when families aren't available to ask.
• Advance directive / DNR status. If you have a DNR or POLST/MOLST, note it — with the actual document available at home or with your physician. The card alone isn't legally sufficient in most jurisdictions.
• Religious or cultural medical preferences. Refusal of blood products (e.g. Jehovah's Witness), kosher / halal dietary notes for hospital stays, language preferences.
• Pregnancy and gestational age if applicable.
• Recent travel if you live in or just returned from a region with locally relevant infectious-disease risk.

What to leave off

Just as important as what to include. The card is found by strangers in emergencies; not everything in your medical record belongs there.

• Social Security Number, national ID, passport number. No emergency-treatment value, real identity-theft risk if the wallet is lost or stolen.
• Home address. Exception: dementia patients, where the benefit (safe return after wandering) outweighs the risk. For everyone else, the responder doesn't need it.
• Long medical history dating back decades. Cite recent events and active conditions only.
• Vague phrasing. “Heart issues” or “back problems” waste the line they sit on.
• Photos. Save space for text. The hospital staff will confirm identity from your face and the name on the card.

Tips for fitting everything on a wallet card

• Use standard medical abbreviations: PCN (penicillin), ASA (aspirin), NKDA (no known drug allergies), HTN (hypertension), DM2 (Type 2 diabetes), CAD (coronary artery disease), CHF (congestive heart failure), CKD (chronic kidney disease), s/p (status post, i.e. after).
• Drop articles and connecting words. “Allergic to PCN” is fine as “PCN ALLERGY”.
• List dose with the drug, not on a separate line: Apixaban 5mg BID, not Apixaban / 5mg / twice daily.
• Use the wallet card for must-knows and a fridge card for full detail. The combined PDF gives you both formats in one printout.
• Phone Medical ID complements the card — put the long-form list there and only the must-knows on paper.

Where to keep the card

A perfect card nobody finds is no card at all. Distribute copies:

• Wallet — in front of bank cards. Many EMS training programs explicitly cover “check the wallet”.
• Fridge — the larger 5×7″ version on the refrigerator door. UK paramedics call this the “Message in a Bottle” tradition; it's built into training in the US, UK, and parts of Canada.
• Glove box — for car accidents.
• Carer's phone — a photo of the card on the primary contact's phone, plus phone Medical ID set up.
• Travel bag if you're going abroad — translated copy if visiting a non-English-speaking country.

Common mistakes to avoid

• Writing “allergies: NONE” without verifying. People often forget childhood reactions or assume an old reaction doesn't count. Ask your doctor at the next visit.
• Listing every medication, including vitamins. A list of 30 things gets skimmed past. Highlight the 3–5 that matter.
• Forgetting to update. A card from three years ago is a liability. Set a reminder for every annual physical.
• Using a number that doesn't answer. Test it. Call the contact and confirm they pick up. If they screen unknown numbers, mention it: “Sarah — texts faster than calls.”
• Writing illegibly or laminating over a printer-ink card. Sweat and lamination glue can blur ink-jet printouts. Use a laser printer, or hand-write in permanent marker if you're going to laminate.

Frequently asked questions

Make your card now

The free emergency card generator covers every field on this checklist, prints a wallet card and a fridge card from one form, and stores nothing on a server — everything stays in your browser. For specific conditions, the diabetes, heart condition, and dementia guides show what to put in each field for that condition.