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Sebastian Mejia, DVM, Diplomate ACVS - Small Animal, is a surgeon providing services at Veterinary Medical And Surgical Group–OC (VMSG-OC) in Orange County. 

Dr. Sebastian Mejia graduated from La Salle University in Bogota, Colombia in 2010 and moved shortly thereafter to Orange County, CA. He completed a rotating internship at the Veterinary Medical and Surgical Group (VMSG) in Ventura, CA.

After this he completed a surgical internship at VCA ARECA in Mesa, AZ and two additional sub-specialty internships, one involving orthopedic clinical trials and the other in surgical oncology research at Colorado State University, during which he published multiple manuscripts as a Primary Author. He then finally completed a small animal surgical residency at the University of Missouri. He holds Diplomate status in the American College of Veterinary Surgeons - Small Animal.

Dr. Mejia’s professional interests include advanced orthopedic surgery, angular limb deformities, 3D printing for pre-surgical planning, spinal fractures, surgical oncology and complex reconstructive surgery. He lives with his cat, Dr. Gonzo and his 2 dogs, Kaya and Baba Voss. In his free time, he enjoys working out, reading, riding his motorcycle, traveling and snorkeling.

Surgeries Performed

  • Minimally invasive arthroscopic meniscal assessment and treatment for cruciate ligament ruptures 
  • Tibial plateau leveling osteotomy (TPLO)
  • Medial (MPL) and lateral (LPL) patellar luxation correction
  • Fracture stabilization through open reduction and internal fixation (ORIF)
  • Elbow arthroscopy for fragmented medical coronoid process (FCP)
  • Elbow, shoulder and tarsus arthroscopy for osteochondrosis dissecans (OCD) lesions
  • Toggle pin for hip luxation
  • Femoral head and neck excision (FHNE)
  • Angular limb deformity (ALD) corrective osteotomies
  • Juvenile pelvic symphysiodesis (JPS) and double pelvic osteotomy (DPO) for the treatment of canine hip dysplasia
  • Carpal and tarsal arthrodesis

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New Patients Welcome

Veterinary Medical And Surgical Group–OC (VMSG-OC) accepts new clients to our specialty services and 24/7 emergency services.

Contact Us

Contact (949) 201-4100