Sub-Specialists as Independent Contractors To TS, LLP

NEUROSURGEONS

David Adler, MD Neurosurgeon/Spine 1040 NW 22nd - Suite #640 Portland, OR 97227 (503) 796-2743 Jefferson Chen, MD, Ph.D. Medical Director of Neurosurgery 501 N. Graham - Suite #580 Portland, OR 97227 (503) 528-0704 Michael Dorsen, MD Neurosurgeon/Spine 501 N. Graham - Suite #315 Portland, OR 97227 (503) 282-1021

Kent Grewe, MD Neurosurgeon/Spine Medical Director of Spine Surgery 501 N. Graham - Suite #545 Portland, OR 97227 (503) 281-0448 Frank Soldevilla, MD Neurosurgeon 19250 SW 65th Avenue - Suite #E-590 Tualatin, OR 97062 (503) 885-8845

CARDIOLOGISTS Pacific Heart, PC 300 N. Graham - Suite #320 Portland, OR 97227 Kathy Grewe, MD Ramnik Jhooty, MD Neshe North, MD David Peizner, MD

CARDIOTHORACIC SURGEONS The Oregon Clinic (formerly NW Surgical Associates) 2222 N.W. Lovejoy - Suite #315 Portland, OR 97209 (503) 226-6321 Jonathan G. Hill, MD Alan Martin, MD

SPINE SURGEONS (Thoracic & lumbar spines) David Adler, MD Neurosurgeon/Spine 1040 NW 22nd - Suite #640 Portland, OR 97227 (503) 796-27434 Jeffrey Flemming, MD (Orthopedic Spine Surgeon) 5050 NE Hoyt, Ste 660 Portland, OR 97213 (503) 736-1201 Timothy Keenan, MD (Orthopedic Spine Surgeon)

PEDIATRIC INTENSIVISTS James Lindsey, MD 2801 N Gantenbein Ave, 3135 Portland, OR 97227 (503) 413-4394 Peter A. Quint, MD 2801 N Gantenbein Ave Portland, OR 97227-1623 (503) 413-4394