v3.19.3.a.u2
Document and Entity Information
Dec. 08, 2019
Document and Entity Information [Abstract]  
Document Type 8-K
Document Period End Date Dec. 08, 2019
Entity File Number 001-37359
Entity Registrant Name Blueprint Medicines Corporation
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 26-3632015
Entity Address, Address Line One 45 Sidney Street
Entity Address, State or Province MA
Entity Address, City or Town Cambridge
Entity Address, Postal Zip Code 02139
City Area Code 617
Local Phone Number 374-7580
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common stock, par value $0.001 per share
Trading Symbol BPMC
Security Exchange Name NASDAQ
Entity Emerging Growth Company false
Entity Central Index Key 0001597264
Amendment Flag false