v3.25.3
Cover Page
9 Months Ended
Sep. 30, 2025
Document Information [Line Items]  
Document Type 6-K
Amendment Flag false
Document Period End Date Sep. 30, 2025
Document Fiscal Year Focus 2025
Document Fiscal Period Focus Q3
Entity Registrant Name Ascendis Pharma A/S
Entity Central Index Key 0001612042
Current Fiscal Year End Date --12-31