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Cover Page
 3 Months Ended
Mar. 31, 2024
Document Information Line Items  
Document Type S-4
Amendment Flag false
Entity Central Index Key 0001840425
Entity Registrant Name BELLEVUE LIFE SCIENCES ACQUISITION CORP.
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 84-5052822
Entity Address, Address Line One 10900 NE 4th Street
Entity Address, Address Line Two Suite 2300
Entity Address, City or Town Bellevue
Entity Address, State or Province WA
Entity Address, Postal Zip Code 98004
City Area Code 425
Local Phone Number 635-7700
Entity Filer Category Non-accelerated Filer
Entity Small Business true
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Primary SIC Number 6770
Business Contact [Member]  
Document Information Line Items  
Contact Personnel Name Kuk Hyoun Hwang
Entity Address, Address Line One 10900 NE 4th Street
Entity Address, Address Line Two Suite 2300
Entity Address, City or Town Bellevue
Entity Address, State or Province WA
Entity Address, Postal Zip Code 98004
City Area Code 425
Local Phone Number 635-7700