Board-Certified Knee and Shoulder Ortho Surgeon
Location: Del Mar – 12264 El Camino Real #202 San Diego, CA 92130
Phone: (858) 356-0361
Questions/Referrals: intake@coastalmedicalgroupsd.com

Education
University of California, Irvine
School of Biological Sciences
B.S., Summa cum Laude, 1987
Phi Beta Kappa National Honor Society
Alpha Epsilon Delta Honor Society

University of California, Los Angeles
School of Medicine
M.D., Honors in Surgery, 1991
Alpha Omega Alpha Honor Medical Society

University of California, San Diego
Department of Orthopedics
Intern, Surgery, 1991-1992
Fellow, Orthopedic Research, 1992-1993
Resident, Orthopedic Surgery, 1993-1997
Chief Resident, Orthopedic Surgery, 1996-1997

Southern California Orthopedic Institute
Fellow, Sports Medicine and Arthroscopy, 1997-1998

Academic Title

  • University of California, San Diego

    Department of Orthopedics

    Clinical Instructor, 1999-Present

Certification

  • American Board of Orthopedic Surgery

    Certified, 2000

    Recertified, 2009

  • American Board of Independent Medical Examiners

    Certified, 2012

  • National Board of Medical Examiners

    Diplomate, 1992

Licensure

  • The Medical Board of California

    Physician and Surgeon, 1992-Present

Appointments

Administrative

  • Scripps Encinitas Surgery Center

    Governing Board, 2009-Present

  • Scripps Memorial Hospital, Encinitas

    Chief, Orthopedic Surgery, 1998-1999

    Medical Director, Ambulatory Surgery, 2001-2005

    Infection Control Committee, 2001-2003

  • UC San Diego, Medical Center

    Infection Control Committee, 1996-1997

Academic

  • UC San Diego, School of Medicine

    Department of Orthopedics

    Clinical Instructor, 1999-Present

    Resident Selection Committee, 1997

  • UCLA, School of Medicine

    Committee on Undergraduate Education, 1989-1991

    Admissions Committee, 1988-1989

    Virtual Advisor, 2011-Present

  • University of California, Irvine

    Advisory Committee on Intercollegiate Athletics, 1986-1987

Corporate

  • Biomet Sports Medicine

    Consultant, Product Development, 2011-Present

  • Ceterix Orthopedics

    Consultant, Product Development, 2014-Present

Community

  • California State University, San Marcos

    Orthopedic Consultant, Head Team Physician, 1998-Present

    Trust Foundation Board Member, 1998-2008

  • Los Angeles Valley College

    Orthopedic Consultant, Team Physician, 1997-1998

  • La Costa Canyon High School

    Orthopedic Consultant, Team Physician, 2003-Present

  • Carlsbad High School

    Orthopedic Consultant, Team Physician, 1998-2003

  • St. Francis High School

    Orthopedic Consultant, Team Physician, 1997-1998

  • LFL San Diego Seduction

    Head Team Physician, 2010

  • Acura Classic, Sony Ericsson WTA Tour, U.S. Open Series

    Chief Tournament Physician, 2007

  • National Surf League-The Game

    League Physician, 2005

  • US National Synchronized Team Skating Championship

    Event Physician, 2004

  • Imperial Beach Duathlon/Triathlon

    Event Physician, 2004

  • Boost Mobile Pro of Surf at Lower Trestles

    Event Physician, 2004

  • Rob Machado Surf Classic

    Event Physician, 2004

  • Swami’s Cardiff Surf Classic

    Event Physician, 2004

  • Silver Strand Half-Marathon

    Event Physician, 2003

  • Suzuki Rock N’ Roll Marathon

    Sports Medicine Team Captain, 1999

  • City of Newport Beach

    Ocean Lifeguard, 1986-1987

Affiliations

  • Scripps Memorial Hospital, Encinitas, 1998-Present
  • Scripps Encinitas Surgery Center, Encinitas, 2008-Present

Associations

  • American Academy of Orthopedic Surgery

    Fellow, 2000-Present

  • Arthroscopy Association of North America

    Fellow, 1999-Present

  • American Orthopedic Society for Sports Medicine

    Fellow, 1999-Present

  • San Diego County Medical Society, 1998-Present
  • Scripps Ximed Medical Associates, 1998-Present
  • Western Orthopedic Association, 1999-Present
  • California Medical Association, 1998-Present
  • California Orthopedic Association, 1999-Present
  • LA County Medical Association, 1988-1990

    Committee on Sports Medicine, 1988-1989

Awards

  • UCLA, School of Medicine
    • Alpha Omega Alpha Honor Medical Society, 1990
    • UC Regents’ Health Science Scholar, 1987-1991
  • Massachusetts General Hospital
    • Pinkney Scholar, Orthopedic Research, 1989
  • University of California, Irvine
    • UC Regents’ Scholar, 1983-1987
    • Chancellor’s Club Scholar, 1983-1987
    • Phi Beta Kappa Mu Chapter Scholar, 1985-1986
    • Phi Delta Theta Scholarship Merit Award, 1985-1986
    • Aldrich Senior Merit Scholar, 1986-1987
    • UCI Intercollegiate Water Polo NCAA Division I, 1983-1984
    • UCI Intercollegiate Swimming NCAA Division I, 1983-1987

      Varsity Letter, 1983-1987

    • PCAA Scholar-Athlete Award, 1983-1987
  • National Merit Scholar, Finalist, 1983
  • San Diego Magazine Top Physician, 2004
  • International Association of Orthopedic Surgeons Top Doctor, 2010
  • Healthgrades Recognized Doctor Honor Roll

Vitals.com

  • Top 10 Doctor – Encinitas, CA – Orthopedic Surgeon, 2014
  • Compassionate Doctor Award – 5 Year Honoree, 2013-2014
  • Compassionate Doctor Recognition, 2009-2014
  • On-Time Physician Award, 2009, 2014-2015
  • Patients’ Choice Award, 2008-2015
  • Patients’ Choice 5th Anniversary Award, 2012-15
  • Consumers’ Research Council of America America’s Top Orthopedists, 2012 Top Surgeon, 2006

Publications

Textbook Chapters

  1. Loren, GJ and Meals, RA: “The Ultimate Mystery: Osteochondritis Dissecans.” In Meals, RA: One Hundred Orthopedic Conditions Every Doctor Should Understand. Louis, Quality Medical Publishing, 1992.
  2. Loren, GJ and Ferkel, RD: “Arthroscopic Strategies in Fracture Management of the Ankle.” In Chow, JC: Advanced Arthroscopy, New York, Springer-Verlag, 2001.
  3. Loren, GJ and Meals, RA: “The Ultimate Mystery: Osteochondritis Dissecans.” In Meals, RA: One Hundred Orthopedic Conditions Every Doctor Should Understand, 2nd edition, 2006.

Journal Articles

  1. Shapiro MS, Kabo JM, Mitchell PW, Loren G, and Tsenter M: Ankle sprain prophylaxis: An analysis of the stabilizing effects of braces and tape. American Journal of Sports Medicine, 22(1):78-82, 1993.
  2. Kabo JM, Gebhard JS, Loren GJ, and Amstutz HC: In vivo wear of polyethylene acetabular components. Journal of Bone and Joint Surgery, 75-B: 254-8, 1993.
  3. Rosen G, Loren GJ, Brien EW, Ramana L, Waxman A, Lowenbraun S, Eckardt JJ, Eilber F, Menendez L, and Mirra JM: Serial thallium-201 scintigraphy in osteosarcoma: Correlation with tumor necrosis following preoperative chemotherapy. Clinical Orthopedics and Related Research, 293:302-6, 1993.
  4. Lieber RL, Loren GJ, and Friden J: In vivo measurement of human wrist extensor muscle sarcomere length changes. Journal of Neurophysiology, 71(3):874-81, 1994.
  5. Loren GJ and Lieber RL: Tendon biomechanical properties enhance human wrist muscle specialization. Journal of Biomechanics, 28(7):791-9, 1995.
  6. Loren GJ, Shoemaker SC, Burkholder TJ, Jacobson MD, Friden J, and Lieber RL: Human wrist motors: Biomechanical design and application to tendon transfers. Journal of Biomechanics, 29(3):331-42, 1996.
  7. Loren GJ: Pain and joint immobility following Colles’ fracture. Journal of Musculoskeletal Medicine, 13(6):62-3, 1996.
  8. Loren GJ, Karpinski NC, and Mubarak SJ: Clinical implications of clubfoot histopathology. Journal of Pediatric Orthopedics, 18:765-9, 1998.
  9. Loren GJ, Mohler RL, and Pedowitz RA: Bilateral compartment syndrome of the leg complicating tetanus infection. Orthopedics, 24(10):997-9, 2001.
  10. Loren GJ and Ferkel RD: Arthroscopic assessment of occult intraarticular injury in acute ankle fractures. Arthroscopy, 53(1):43-50, 2003.
  11. 11 Ward SR, Loren GJ, Lundberg S, and Lieber RL: High Stiffness of Digital Flexor Tendons is Suited for Precise Finger Positional Control. Journal of Neurophysiology, 96:2815-2818, 2006.

Abstracts

  1. Kabo JM, Gebhard JS, Loren GJ, Amstutz HC: In vivo wear of UHMWPE acetabular cups. Transactions of the Combined Meeting of the Orthopedic Research Societies of USA, Japan and Canada, 1:192, 1991.
  2. Shapiro MS, Kabo JM, Mitchell PW, Loren GJ, and Tsenter M: The effectiveness of prophylactic bracing and tape in resisting ankle inversion. Transactions of the Orthopedic Research Society, 17:487, 1992.
  3. Jacobson MD, Loren GJ, Yeatman P, Sokoloff B, and Lieber RL: Relationship between moment arms and muscle properties during wrist joint rotation. Transactions of the Orthopedic Research Society, 18:318, 1993.
  4. Loren GJ and Lieber RL: Tendon biomechanical properties enhance human wrist muscle specialization. Transactions of the Orthopedic Research Society, 19:691, 1994.
  5. Loren GJ, Shoemaker SC, Burkholder TJ, Jacobson MD, Friden J, and Lieber RL: Biomechanical determinants of human wrist strength. Transactions of the Orthopedic Research Society, 20:20, 1995.
  6. Burkholder TJ, Loren GJ, Shoemaker SC, Jacobson MD, Friden J, and Lieber RL: Biomechanical determinants of wrist torque. Medicine and Science in Sports and Exercise, 27:S159, 1995.
  7. Mubarak SJ, Loren GJ, and Karpinski N: Clinical implications of clubfoot histopathology. Pediatric Orthopedic Society of North America, 60-61, 1998.
  8. Loren GJ, Snyder SJ, Karzel RP, and Wichman MT: Extended success of arthroscopic capsular plication for glenohumeral instability. Arthroscopy Association of North America, 128, 1999.
  9. Loren GJ and Ferkel RD: Arthroscopic assessment of occult intra-articular injury in acute ankle fractures. International Federation of Foot and Ankle Societies, 2002.
  10. Whitehurst JB, Snyder SJ, Karzel RP, Loren GJ: Arthroscopic pan-capsular plication for glenohumeral multidirectional instability. Arthroscopy Association of North America, 2003.

Video

  1. Snyder SJ and Loren GJ: Partial articular supraspinatus tendon avulsion: The PASTA lesion. A description of the injury and technique of arthroscopic repair. Southern California Orthopedic Institute, Van Nuys, June 1998.

Popular Media

  1. “Modified exercise plan can aid those with arthritis,” by E’Louise Ondash, North County Times, 22 February, 2003.
  2. Bone Putty, narrated by Peggy Pico RN, KNBC 7/39, San Diego, June, 2004.
  3. “A booming business: Encinitas has slew of health care facilities in the pipeline,” by Adam Kaye, North County Times, 22 February, 2007.
  4. “Foundation offers medical safety net,” by William Finn Bennett, North County Times, 11 June 2007.
  5. Sports Injuries, interview with Meg Banta, KPRI 102.1 FM, San Diego, 19 October, 2008.
  6. Loren MD, Gregory James. “Reflex Sympathetic Dystrophy.” ModernMedicine, 14 September, 2005.

Presentations

International

  1. Loren GJ, Snyder SJ, Karzel RP, and Wichman MT: Extended success of arthroscopic capsular plication for glenohumeral instability. Arthroscopy Association of North America, Vancouver, British Columbia, Canada, April 1999.
  2. Loren GJ: Arthroscopic strategies in reduction and fixation of ankle fractures. IX International Congress of Arthroscopy and Sports Medicine, Buenos Aires, Argentina, June 2006.
  3. Loren GJ: Arthroscopic assessment of occult intraarticular injury in acute ankle fractures. IX International Congress of Arthroscopy and Sports Medicine, Buenos Aires, Argentina, June 2006.
  4. Loren GJ: Ankle Arthroscopy: Live surgical demonstration of anatomy and techniques. IX International Congress of Arthroscopy and Sports Medicine, Buenos Aires, Argentina, June 2006

National

  1. Jacobson MD, Loren GJ, Yeatman P, Sokoloff B, and Lieber RL: Relationship between moment arms and muscle properties during wrist joint rotation. Orthopedic Research Society, San Francisco, February 1993.
  2. Loren GJ and Lieber RL: Tendon biomechanical properties enhance wrist muscle specialization. Orthopedic Research Society, New Orleans, February 1994.
  3. Loren GJ, Shoemaker SC, Burkholder TJ, Jacobson MD, Friden J, and Lieber RL: Human wrist motors: Biomechanical design and implications in tendon transfer. Orthopedic Research Society, Orlando, February 1995.
  4. Laboratory Instructor: Shoulder Arthroscopy and Arthroplasty. 15th Annual

    Meeting, San Diego, June 1998.

  5. Faculty: San Diego Shoulder Arthroscopy, Arthroplasty, Fractures. 16th Annual

    Meeting, San Diego, June 1999.

  6. Faculty: San Diego Shoulder Arthroscopy, Arthroplasty, Fractures. 17th Annual

    Meeting, San Diego, June 2000.

  7. Faculty: San Diego Shoulder Arthroscopy, Arthroplasty, Fractures. 18th

    Annual Meeting, San Diego, June 2001.

  8. Instructor: Updates in Shoulder Surgery. Arthrex, Inc., Los Angeles, June 2001.
  9. Instructor: Knee Arthroscopy and Instrumentation Master Class. Atlantech, Inc. Washington, DC, April 2002.
  10. Faculty: San Diego Shoulder Arthroscopy, Arthroplasty, Fractures. 19th Annual

    Meeting, San Diego, June 2002.

  11. Laboratory Instructor: Arthroscopy Association of North America, 21st Fall

    Course. Ankle Arthroscopy, Palm Desert, November 2002.

  12. Faculty: San Diego Shoulder Arthroscopy, Arthroplasty, Fractures. 20th Annual

    Meeting, San Diego, June 2003.

  13. Laboratory Instructor: Arthroscopy Association of North America, 22nd Fall

    Course. Ankle Arthroscopy, New Orleans, November 2003.

  14. Faculty: San Diego Shoulder Arthroscopy, Arthroplasty, Fractures. 21st Annual

    Meeting, San Diego, July 2004.

  15. Laboratory Instructor: Arthroscopy Association of North America 23rd Annual Fall

    Course. Shoulder Arthroscopy, Palm Desert, December 2004.

  16. Faculty: San Diego Shoulder Arthroscopy, Arthroplasty, Fractures. 22nd Annual

    Meeting, San Diego, June 2005.

  17. Instructor: Master’s Course in Shoulder Surgery. Arthrex, Inc., Los Angeles, November 2005.
  18. Faculty: San Diego Shoulder Arthroscopy, Arthroplasty, Fractures. 23rd Annual

    Meeting, San Diego, June 2006.

  19. Faculty: San Diego Shoulder Arthroscopy, Arthroplasty, Fractures. 24th Annual

    Meeting, San Diego, June 2007.

  20. Faculty: San Diego Shoulder Arthroscopy, Arthroplasty, Fractures. 25th Annual

    Meeting, San Diego, June 2008.

  21. Faculty: San Diego Shoulder Arthroscopy, Arthroplasty, Fractures. 26th Annual

    Meeting, San Diego, June 2009.

  22. Faculty: San Diego Shoulder Arthroscopy, Arthroplasty, Fractures. 27th Annual

    Meeting, San Diego, June 2010.

  23. Faculty: San Diego Shoulder Arthroscopy, Arthroplasty, Fractures. 28th Annual

    Meeting, San Diego, June 2011.

  24. Faculty: San Diego Shoulder Arthroscopy, Arthroplasty, Fractures. 29th Annual

    Meeting, San Diego, June 2012.

  25. Faculty: San Diego Shoulder Arthroscopy, Arthroplasty, Fractures. 30th Annual

    Meeting, San Diego, June 2013.

  26. Faculty: San Diego Shoulder Arthroscopy, Arthroplasty, Fractures. 31 st Annual

    Meeting, San Diego, June 2014.

  27. Faculty: San Diego Shoulder Arthroscopy, Arthroplasty, Fractures. 32nd Annual

    Meeting, San Diego, June 2015.

Regional

  1. Loren GJ and Lieber RL: The behavior of tendons of the human wrist under

    physiological loads. UCSD Orthopedic Grand Rounds, San Diego, June 1993.

  2. Loren GJ, Shoemaker SC, Burkholder TJ, Jacobson MD, Friden J, and Lieber RL:

    Influences of human wrist motor design on joint torque. UCSD Orthopedic

    Grand Rounds, San Diego, June 1994.

  3. Loren GJ: Chondral resurfacing: Clinical options and outcomes in articular lesions of

    the knee. UCSD Orthopedic Grand Rounds, San Diego, February 1996.

  4. Loren GJ and Mubarak SJ: Clinical implications of muscle histopathology in idiopathic

    congenital equinovarus. Children’s Hospital and Health Center, San Diego, March 1996.

  5. Loren GJ: Primary evaluation of the popliteal cyst. VA Urgent Care Symposium,

    La Jolla, September 1996.

  6. Loren GJ: Cervical spine injuries in sports. UCSD Surgery Grand Rounds, La Jolla,

    October 1996.

  7. Loren GJ: Surgical neck fractures of the proximal humerus: Clinical considerations and

    management options. UCSD Orthopedic Grand Rounds, San Diego,

    January 1997.

  8. Loren GJ: Intra-articular dislocation of the patella. UCSD Orthopedic Grand Rounds, San Diego, May 1997.
  9. Loren GJ: Acute post-obstructive pulmonary edema in orthopedic surgery. UCSD Orthopedic Grand Rounds,

    San Diego, May 1997.

  10. Loren GJ: Musculoskeletal complications of tetanus infection. UCSD

    Orthopedic Grand Rounds, San Diego, May 1997.

  11. Snyder SJ and Loren GJ: Partial articular supraspinatus tendon avulsion: The PASTA

    lesion. A description of the injury and technique of arthroscopic repair. Southern California Orthopedic Institute, Van Nuys, June 1998.

  12. Loren GJ and Ferkel RD: Arthroscopic assessment of occult intra-articular injury in

    acute ankle fractures. Southern California Orthopedic Institute, Van Nuys, June 1998.

  13. Loren GJ, Snyder SJ, Karzel RP, and Wichman MT: Extended success of arthroscopic capsular plication for glenohumeral instability. Southern California Orthopedic Institute, Van Nuys, June 1998.
  14. Loren, GJ: CME Trauma. Proximal Humerus Fractures. UCSD Department of Orthopedics, San Diego, September 1998.
  15. Loren, GJ: CME Sports Medicine, Knee & Shoulder. Arthroscopy for arthrosis and Management of Osteochondral Injury. UCSD Department of Orthopedics, San Diego, June 1999.
  16. Loren, GJ: CME Sports Medicine, Knee & Shoulder. Shoulder Arthritis and Arthroplasty. UCSD Department of Orthopedics, San Diego, September 1999.
  17. Loren, GJ: CME Sports Medicine, Knee & Shoulder. Posterolateral Instability of the Knee. UCSD Department of Orthopedics, San Diego, April 2000.
  18. Loren, GJ: CME Sports Medicine, Knee & Shoulder. Arthroscopy for Arthrosis and Management of Osteochondral Injury. UCSD Department of Orthopedics, San Diego, December 2000.
  19. Laboratory Instructor: Smith Nephew Dyonics/Orthopedic Biosystems Limited. Operative Shoulder Arthroscopy, Carlsbad, January 2001.