I was reassessed for over the limit of $10 000 for medical expenses while claiming the Disability Tax Credit. Can I claim the amount over $10 000 on my 2023 return?

You will need to contact the Canada Revenue Agency (CRA) and double check it with them. 

If you are in Canada or the United States, you can call the CRA at 1-800-959-8281. If you are elsewhere, you can call 613-940-8495. This page has more ways to contact the CRA: Contact the Canada Revenue Agency