Medicare after being approved for ssdi

Can anyone tell me how long it takes to be approved for medicare after being approved for ssdi? My daughter is in the last stage before a decision is made. I really feel like she will get it. Any info will be appreciated.

In my daughter’s case, the approval date for her SSI was the start date of her medicaid. I believe it is automatically done when she gets SSI (or it was in our case). I am not sure about medicare though. The whole process for us took about 3 months from the application to approval. She also qualifies for medicaid through the medically dependent children’s program. Hope this helps and you hear something for them soon regarding her case!