Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Mar. 09, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-38242
Entity Registrant Name	ORTHOPEDIATRICS CORP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-1761833
Entity Address, Address Line One	2850 Frontier Drive
Entity Address, City or Town	Warsaw
Entity Address, State or Province	IN
Entity Address, Postal Zip Code	46582
City Area Code	574
Local Phone Number	268-6379
Title of 12(b) Security	Common Stock, $0.00025 par value per share
Trading Symbol	KIDS
Security Exchange Name	NASDAQ
Entity Well Known Seasoned Issuer	No
Entity Voluntary Filers	No
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	true
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float			$ 593.7
Entity Common Stock, Shares Outstanding		19,658,335
Document Fiscal Period Focus	FY
Amendment Flag	false
Document Fiscal Year Focus	2020
Entity Central Index Key	0001425450