KRG Capital Partners has acquired two Michigan-based outpatient rehabilitation practices, SCP Physical Therapy and Dwight Orthopedic Rehabilitation. Terms for each deal were not disclosed.

The Denver-based private equity firm facilitated each purchase through portfolio company ATI Physical Therapy Holdings LLC. The firm had originally sold ATI to Chicago financial sponsor GTCR in March 2010 only to buy it back again in December 2012. Since then, the Bolingbrook, Ill.-based rehabilitation service has completed five acquisitions, including North River Physical Therapy, a Chattanooga, Tenn.-based outpatient physical therapy provider.

SCP and Dwight Orthopedic add 51 clinics to ATI, which provides orthopedic rehabilitation services through more than 250 clinics in Illinois, Indiana, Wisconsin, Ohio, Maryland, Pennsylvania, Delaware, Georgia and Tennessee.

KRG has about $2 billion in capital under management and currently invests out of KRG Capital Partners Fund IV, which has $1.96 billion in capital commitments.

Several other physician groups have also been acquired in recent months, spurred by the Affordable Care Act.

For more on the trend, see the video “ACA Accelerates Physician Group Consolidation.”