### Question
How is the term applicable ACO defined?


### Answer
The term **applicable ACO** is defined in *42 U.S.C. § 1395jjj* as the following:

> an ACO participating in a model tested or expanded under section 1315a of this title or under this section—


(i) that operates under a two-sided model—


(I) described in section 425.600(a) of title 42, Code of Federal Regulations

#### Citation:
  - *42 U.S.C. § 1395jjj*
  - Heading: **CHAPTER 7-SOCIAL SECURITY > SUBCHAPTER XVIII-HEALTH INSURANCE FOR AGED AND DISABLED > Part E-Miscellaneous Provisions**

