v3.26.1
Document And Entity Information - shares
 3 Months Ended
Mar. 31, 2026
May 11, 2026
Document Information [Line Items]    
Entity Central Index Key 0001799011  
Entity Registrant Name Lucid Diagnostics Inc.  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2026  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-40901  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 82-5488042  
Entity Address, Address Line One 360 Madison Avenue  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10017  
City Area Code 917  
Local Phone Number 813-1828  
Title of 12(b) Security Common Stock, $0.001 par value per share  
Trading Symbol LUCD  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   203,066,783