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Cover - USD ($) $ in Millions	12 Months Ended
Cover - USD ($) $ in Millions	Dec. 31, 2024	Feb. 14, 2025	Jun. 28, 2024
Entity Listings [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-39482
Entity Registrant Name	GeneDx Holdings Corp.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	85-1966622
Entity Address, Address Line One	333 Ludlow Street
Entity Address, Address Line Two	North Tower
Entity Address, Address Line Three	6th Floor
Entity Address, City or Town	Stamford
Entity Address, State or Province	CT
Entity Address, Postal Zip Code	06902
City Area Code	888
Local Phone Number	729-1206
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 432
Entity Common Stock, Shares Outstanding		28,068,274
Documents Incorporated by Reference	Part III incorporates information by reference from the registrant’s definitive proxy statement to be filed with the Securities and Exchange Commission pursuant to Regulation 14A, not later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K, in connection with the registrant’s 2025 Annual Meeting of Stockholders (the “2025 Proxy Statement”).
Entity Central Index Key	0001818331
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Amendment Flag	false
Common Class A
Entity Listings [Line Items]
Title of 12(b) Security	Class A common stock, par value $0.0001 per share
Trading Symbol	WGS
Security Exchange Name	NASDAQ
Outstanding warrants
Entity Listings [Line Items]
Title of 12(b) Security	Warrants to purchase one share of Class A common stock, each at an exercise price of $379.50 per share
Trading Symbol	WGSWW
Security Exchange Name	NASDAQ