Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Oct. 31, 2020
Document and Entity Information [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2020
Entity File Number	001-39580
Entity Registrant Name	Immunome, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0694340
Entity Address State Or Province	PA
Entity Address, Address Line One	665 Stockton Drive
Entity Address, Adress Line Two	Suite 300
Entity Address, City or Town	Exton
Entity Address, Postal Zip Code	19341
City Area Code	610
Local Phone Number	321-3700
Title of 12(b) Security	Common Stock, 0.0001 par value
Trading Symbol	IMNM
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		10,541,629
Entity Central Index Key	0001472012
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Amendment Flag	false