It sounds like it could be, but there's not enough info to get a better answer. What's your flock history. Example, a flock that was hatched together on your property with no outside contact from anything probably does not have Marek's.
A flock that's been added to in the past 8-10 weeks with a live bird, has a good chance of coming with Marek's if one of yours is now lame. And if another one of your birds comes up with lameness or unable to walk, that could mean Marek's.
My young ones presented with an "injured leg". When the second one did, I knew what it was. They both couldn't walk without their wings. But they ate and drank fine. But wasted away anyway.
Like Cenrarchid, I didn't know that my flock carried it until I hatched 10 chicks and at 8 weeks, they died one by one, paralysis, and I had to cull. I don't know how long they can live with paralysis, since most waste away too.
In the past 2 years, I had hatched chicks with no problems. But last summer, my silkies hatched pruchased eggs from me, and all the chicks died from it from 8-16 weeks.
So you have to think about the symptoms, and a flock history to get a better answer because there is no test, no cure, no way to stop the spread-, or getting it in your flock by only having
hatched eggs on your property, or gotten vaccinated hatchery day old chicks.
And vaccinated chicks can get the virus from other chickens, just most will not die from it, just carry it.
Centrarchid and Leadwolf1 have excellent info too. As well as others.