Simple answer yes and no.
Some of that doctrine may be biblical and some non-biblical. Some view a lot of their doctrines as "romanist cultish", and I had heard the EOC brand it as a heresy.
I have a few RC friends and relatives and I love them all the same........
Catholicism
Catholicism Catholicism fast facts and introduction
For the first 1,500 years of Christianity there was no "Catholicism" as it is known it today, simply because there were no other forms of Christianity to distinguish it. There was only the "one, holy, catholic church" ("catholic" means "universal"), which was the body of Christian believers all over the western world, united by common traditions, beliefs, church structure and worship. Before the Reformation (in the 1500s), if you were a Christian, you belonged to the Catholic Church. Any other form of Christianity was considered a heresy, not a Christian denomination.........