v3.23.1
Document and Entity Information - shares
 3 Months Ended
Mar. 31, 2023
Apr. 26, 2023
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2023  
Document Fiscal Year Focus 2023  
Document Fiscal Period Focus Q1  
Document Quarterly Report true  
Document Transition Report false  
Entity Registrant Name Biomea Fusion, Inc.  
Entity Central Index Key 0001840439  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Trading Symbol BMEA  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Small Business true  
Entity Common Stock, Shares Outstanding   35,401,134
Entity Interactive Data Current Yes  
Title of 12(b) Security Common Stock, $0.0001 par value  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Shell Company false  
Entity File Number 001-40335  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 82-2520134  
Entity Address, Address Line One 900 Middlefield Road, 4th Floor  
Entity Address, City or Town Redwood City  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94063  
City Area Code 650  
Local Phone Number 980-9099