COVER PAGE - shares shares in Thousands	3 Months Ended
	Mar. 31, 2020	Apr. 30, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2020
Document Transition Report	false
Entity File Number	001-38983
Entity Registrant Name	Livongo Health, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-3542036
Entity Address, Address Line One	150 West Evelyn Avenue
Entity Address, Address Line Two	Suite 150
Entity Address, City or Town	Mountain View
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94041
City Area Code	866
Local Phone Number	435-5643
Title of 12(b) Security	Common Stock, $0.001 par value
Trading Symbol	LVGO
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		97,817
Entity Central Index Key	0001639225
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1