Mark says he just got done with his doctor's visit Wednesday, and the positive prognosis has him feeling blessed.

Hoppus adds ... "Thank you God and universe and friends and family and everyone who sent support and kindness and love."

Mark says he still has to get cancer screenings every 6 months and it will take him until the end of the year to "get back to normal" ... but he says the doc's news is amazing.

As we reported ... Mark revealed back in June he had been quietly battling cancer and vowed to remain hopeful and positive despite being scared about undergoing chemotherapy for lymphoma.

Hopefully, for Mark, the cancer is gone for good.