0001579428 2020-12-31 2020-12-31 0001579428 false 8-K 2020-12-31 Axsome Therapeutics, Inc. DE 001-37635 45-4241907 22 Cortlandt Street, 16th Floor New York NY 10007 212 332-3241 Common Stock, Par Value $0.0001 Per Share AXSM NASDAQ false false false false true true