Coggins vs. Health Certificate: What's the Difference? (2026)
A Coggins test and a health certificate are not the same thing — and for most interstate travel you need both. Here's what each one is, how long it lasts, and when you need it.
By Brian Bickell, who raises paint and quarter horses at Bickell Ranches in Stillwater, Oklahoma.
Two pieces of paper get asked for over and over in the horse world: a Coggins and a health certificate. They sound interchangeable — both come from your vet, both are about your horse being healthy, both get demanded at gates and check-ins. So people file them in the same mental folder and assume one covers the other.
They don't. They're two different documents that do two different jobs, and for most trips across state lines you need both. Show up with only one and you can get turned back at the line.
Here's the plain-English version of what each one is, how long it lasts, and when you actually need it.
Educational, not veterinary or legal advice. Requirements vary by state and change often. Your veterinarian and the destination state's animal health office are the real authority on what your specific trip requires.
The Short Answer
| Coggins Test | Health Certificate (CVI) | |
|---|---|---|
| What it is | A blood test for one disease (EIA) | A vet's hands-on exam of the whole horse |
| What it proves | Your horse is negative for Equine Infectious Anemia | Your horse looks healthy and disease-free right now |
| Who runs it | Your vet draws blood; a lab reports the result | Your vet examines the horse and signs the form |
| How long it lasts | Commonly 6–12 months (varies by state) | Usually about 30 days |
| When you need it | Travel, shows, boarding, sales, most equine events | Crossing state lines; many shows and sales |
The easiest way to keep them straight: a Coggins tests for a specific disease over a long window. A health certificate certifies the horse is healthy today — and it expires fast.
What a Coggins Test Is
A Coggins test is a blood test that screens for Equine Infectious Anemia (EIA) — a viral disease with no vaccine and no cure. It's named after Dr. Leroy Coggins, who developed the test in 1970.
An infected horse is a carrier for life and can spread the virus to every horse around it, often while showing no symptoms at all. That's why a negative Coggins is the price of admission almost everywhere horses gather. Your vet draws the blood; an approved lab runs the test and issues the paperwork (increasingly a digital record with a photo of the horse).
How long it's valid depends on the state and the event. Twelve months is common for general travel, but plenty of states and shows want a Coggins pulled within the last six months. When in doubt, a six-month-old test clears more gates than a twelve-month-old one.
For the full walkthrough — cost, what to do if you lose the paperwork, whether stay-at-home horses need one — see our complete Coggins test guide.
What a Health Certificate Is
A health certificate — officially a Certificate of Veterinary Inspection (CVI) — is different in kind. It's not a lab test for one disease. It's a licensed veterinarian putting hands on your horse, confirming it shows no signs of contagious or infectious disease, and signing a form that says so.
Because it's a snapshot of the horse's condition on the day of the exam, a CVI expires quickly — typically about 30 days, sometimes less for certain destinations. A few states offer extended or six-month CVIs for horses that travel frequently, but you can't assume one applies unless it's written on the certificate.
A CVI usually lists the horse's description, the origin and destination, the owner, and the vet — and it almost always references a current Coggins result, which is exactly why the two travel together.
Why You Usually Need Both
For interstate travel, most states require a horse entering to have:
- A current negative Coggins, and
- A Certificate of Veterinary Inspection
The Coggins proves the horse isn't carrying EIA. The CVI proves it isn't sick with something else right now. One is about a specific lifelong disease; the other is about the horse's general health today. Neither substitutes for the other, which is why "I have my Coggins" doesn't get you across the line by itself.
Requirements differ by state, by event, and sometimes by season or disease outbreak — and they change. Before you haul, check the destination state's animal health office (not your home state's), and give your vet enough lead time to draw blood, get the lab result back, and write the certificate. Plan for a week or more, especially in show season.
For the full interstate checklist — brand inspections, entry permits, transport paperwork — see our guide to documents you need to haul a horse across state lines. Headed to a show? The horse show document checklist covers what secretaries ask for at check-in.
Common Questions
Is a Coggins the same as a health certificate? No. A Coggins is a blood test for one disease (EIA), typically valid 6–12 months. A health certificate (CVI) is a vet's exam confirming the horse looks healthy right now, usually valid about 30 days. For most interstate travel you need both.
Do I need both to haul across state lines? Usually, yes. Most states require a current negative Coggins and a CVI to bring a horse in. Requirements vary and change, so check the destination state vet office before you travel.
How long is a health certificate good for? A standard CVI is typically valid about 30 days, though some states and events want it more recent. Some states offer extended six-month CVIs for frequent travelers. Your vet and the destination state set the rule.
How long is a Coggins good for? Depends on the state — commonly 12 months, but many states and events require one pulled within the last 6 months. Check the rule for wherever you're headed.
Which one do I need for a horse show? Most shows require a current negative Coggins; many also ask for a recent health certificate, especially if you crossed state lines to get there. The premium list or show secretary spells out exactly what to bring.
Keep Both Where You Can Find Them
The paperwork isn't the hard part. Losing it is. The Coggins is buried in the glovebox, the health certificate expired three trips ago and nobody noticed, and now you're standing at a gate doing math on your phone.
This is the whole reason we built HorseBook. Snap a photo of the Coggins result or the health certificate and it's filed with that horse — the document image, the date it was issued, and the date it lapses. When a Coggins is coming up on its window, you get a reminder before it's a problem at the gate instead of after. iPhone and web, so it's with you at the trailer and at the kitchen table.
Whatever system you use, the principle holds: know which document is which, know when each one expires, and keep them somewhere you can pull them up before you load the horse — not while the inspector waits.
Brian Bickell is the founder of HorseBook and raises paint and quarter horses at Bickell Ranches in Stillwater, Oklahoma.