Here is some more information on this linking word. Note the use of punctuation.

Linking word: In addition

Meaning: As well as; plus

Common use 1: Connects between sentences

Grammar: Complete clause. Linking word + comma + complete clause

Example: Many hospitals try to raise money privately. In addition, they receive government subsidies.

Common error: Many hospitals try to raise money privately, in addition they receive government subsidies.

Common use 2: At the end of the sentence

Grammar: Complete clause + comma + noun phrase

Example: Many hospitals try to raise money privately, receiving government subsidies in addition.

Common error: Many hospitals try to raise money privately, receive Government subsidies in addition.