One Call Medical
Onex Corporation
Onsite Health
Ontario Teachers
Panorama Capital
Pappas Ventures
Parallon Business Solutions
Parthenon Capital Partners
Passport Health Communications
PathGroup
PatientImpact
PatientKeeper
Petra Capital Partners
Pfizer – Strategic Investments Group
PharMerica
Pharos Capital Group
PHNS
Plum Healthcare
Pouschine Cook Capital Management
Precision Therapeutics
Press Ganey
Pritzker Group
Professional Case Management
Progress Equity Partners, Ltd.
Proksauer
Prologics
Proskauer Rose
Psilos Group Managers
QSI NextGen
QuestMark Partners
Radius Ventures
RemitDATA
Richland Ventures
Riordan, Lewis & Haden
River Cities Capital Funds
Riverside Company
Riverside Partners
Ross & Company
Safeguard Scientifics
Salix Ventures
Sante Ventures
Scale Venture Partners
Scale Venture Partners
Schooner Capital
Select Medical
SeniorLink
Sentara Health
Sentinel Capital Partners
Sequoia
Sevin Rosen Funds
Siemens Venture Capital
Silverado Health Partners
Silverlink
Solera Capital
Somnia Anesthesia
Sonic Healthcare USA
Spectrum Equity Investors
Spectrum Professional Services
Spindletop Capital
Spotlite
SSM Partners
Stanford University
Sterling HSA
Sterling Partners
Streamline Health
Summer Street Capital Partners
Summit Partners
Surgical Care Affiliates
Surgical Health Group
SV Life Sciences Advisers
Symbion Healthcare
TA Associates
Tailwind Capital Partners
Tavistock Group
Team Health
Telegraph Hill Partners
Tenet Healthcare Corporation
Texas Pacific Group
The Advisory Company
The Aurora Group
The Blackstone Group
The Carlyle Group
The Cleveland Clinic Foundation
The Comvest Group
The Halifax Group
The Jordan Company
The MENTOR Network
The Rehab Documentation Company
The Riverside Company
The Sullivan Group
Thompson Street Capital Partners
Ticonderoga Capital
TowerBrook Capital Partners
Towers Watson
Trident Capital
Trinity Hospital
Trinity Hunt Partners
TripleTree Private Equity
Triton Pacific Capital Partners
Tullis-Dickerson & Co.
U. S. Venture Partners
U.S. Anesthesia Partners
United Drug
United Surgical Partners
Unity Physician Partners
Universal Hospital Services
University of Pittsburgh Medical Center
UPMC
US Imaging
US Renal Care
Valence Health
Vanderbilt University
Vantage Oncology
VantagePoint Venture Partners
Varsity Healthcare Partners
Venture Capital Fund of New England
Vericle
Vesalius Ventures
Vestar Capital Partners
Vicente Capital
Vision Care Holdings
Vision Source
Vohra Wound Physicians
Wafra Partners
Warburg Pincus
Water Street Capital
Water Street Healthcare Partners
Watermark Medical
Waud Capital Partners
WebMD Health Services
Webster Capital
Wellcare
Welsh, Carson, Anderson & Stowe
Westfield Capital Management
Westview Capital Partners
XL Health