Exhibit 21.1

Subsidiaries of Registrant

Name of subsidiary
Northstar Healthcare Holdings, Inc.	4120 Southwest Freeway Suite 150, Houston, TX 77027
Northstar Healtchare Acquisitions, LLC	4120 Southwest Freeway Suite 150, Houston, TX 77027
Northstar Healthcare Subco, LLC	4120 Southwest Freeway Suite 150, Houston, TX 77027
Northstar Healthcare Management Company, LLC	4120 Southwest Freeway Suite 150, Houston, TX 77027
Northstar Healthcare Limited Partner, LLC	4120 Southwest Freeway Suite 150, Houston, TX 77027
Northstar Healthcare General Partner, LLC	4120 Southwest Freeway Suite 150, Houston, TX 77027
The Palladium for Surgery - Dallas, Ltd.	5920 Forest Park Rd, Suite 700, Dallas, TX 75235
The Palladium for Surgery - Houston, Ltd.	4120 Southwest Freeway Suite 200, Houston, TX 77027
Medical Ambulatory Surgical Suites, L.P.	9300 Kirby Drive, Houston, TX 77054
Microsurgery Institute LLC	5920 Forest Park Rd, Suite 700, Dallas, TX 75235
Houston Microsurgery Institute, LLC	4120 Southwest Freeway Suite 200, Houston, TX 77027
First Nobilis, LLC	4120 Southwest Freeway Suite 150 Houston, TX 77027
First Nobilis Hospital, LLC	4801 Bissonnet Street, Bellaire, TX 77401
First Nobilis Surgical Center, LLC	411 First Street, Bellaire, Texas 77401
Athas Health, LLC	10740 North Central Expressway, Suite 275 Dallas, TX 75231
Athas Administrative, LLC	10740 North Central Expressway, Suite 275 Dallas, TX 75231

Exhibit 21.1

Athas Holdings, LLC	10740 North Central Expressway, Suite 275 Dallas, TX 75231
NHC ASC - Dallas, LLC	5920 Forest Park Rd, Suite 700, Dallas, TX 75235
Northstar Healthcare Surgery Center - Houston, LLC	4120 Southwest Freeway Suite 200, Houston, TX 77027
Northstar Healthcare Surgery Center - Scottsdale LLC	9377 E Bell Road, Suite 201, Scottsdale, AZ 85260
Northstar Healthcare Dallas Management, LLC	4120 Southwest Freeway Suite 150 Houston, TX 77027
Northstar Healthcare Northwest Houston Management, LLC	4120 Southwest Freeway Suite 150 Houston, TX 77027