Southern California Orthopedic Specialists (SCOS)

South County Orthopedic Specialists (SCOS) is a group of fellowship-trained orthopaedic sub-specialists with offices across Orange County, California.

Clinicians

• R. Lance Montgomery, MD; Abraham D. Kim, MD; David Molho, MD — hip and knee replacement
• Christopher Veneziano, MD; Scott Graham, MD; Nimish Kadakia, MD; Jeffrey Wong, MD — sports medicine and arthroscopic surgery
• Ryan Fan, MD — hip and knee replacement, sports medicine and arthroscopic surgery
• Arash Aminian, MD; Ajay Gurbani, MD — foot and ankle surgery
• Bryce Johnson, MD — spine surgery
• Ari Youderian, MD — shoulder and elbow surgery
• Amar A. Patel, MD; Gautam Malhotra, MD; Emily Clarke, MD — hand and upper extremity surgery

Regenerative treatments offered

• Orthobiologics — the regenerative medicine page describes bone marrow aspirated from the iliac crest (pelvic bone) for hip treatment, and orthobiologic treatment for the ankle, knee, spine, shoulder and wrist

Conditions the practice lists

Ankle injuries and wear-and-tear damage of the knee, hip, spine, shoulder and wrist.

What to know before you call

• Offices in Laguna Woods (24331 El Toro Road, Suite 200), Irvine, Fountain Valley, Los Alamitos and Placentia, plus a physical therapy site in Yorba Linda
• Appointments are requested through an online form or by texting “Appointment” to 949-586-3200
• Hours: Monday through Friday, 8:00 AM to 5:00 PM; the group also runs OrthoGo urgent care

RPG verification notes

• Physicians and sub-specialties listed on the website
• The regenerative medicine page does not name PRP or stem cell products and does not name a performing physician
• Prices and insurance details not published on the regenerative medicine page

Last verified by Regen Provider Guide: October 2026. Confirm treatment details, candidacy, insurance coverage and costs directly with the practice. RPG makes no claim about the effectiveness of any treatment.