All About Our Doctor:

Dr. John S. Marshburn is an ophthalmologist that has been serving Orange County for over 25 years. He is located in Placentia, California. He is affiliated with UCI Health Placentia Linda Hospital, and surgery centers throughout Orange County.

He earned his Doctor of Medicine (M.D.) from Tulane University School of Medicine. His medical education at Tulane provided a strong foundation in clinical medicine, rigorous training in patient care, and exposure to a diverse patient population.

Dr. John S. Marshburn brings decades of experience as an eye physician and surgeon. Over a long career he has treated thousands of patients, diagnosing complex ocular conditions, performing advanced procedures, and guiding patients through recovery with clear explanations and careful follow-up. His expertise spans routine eye care, dry eye treatment, cataract surgery, glaucoma management, corneal disease, and medical retina. Allowing him to tailor treatment plans to each patient’s needs and lifestyle.

As a leader, Dr. John S. Marshburn is respected for thoughtful decision-making, high standards of care, and a supportive approach to mentoring colleagues and staff. He cultivates a clinic culture that values precision, empathy, and continuous learning, encouraging teamwork and professional development while maintaining a calm, organized environment even under pressure.

At home he is a devoted husband and a loving father. He balances a demanding medical career with family life, prioritizing presence and engagement. Whether at family meals, school events, or weekend activities. His family describes him as dependable, patient, and warm: someone who listens, offers steady guidance, and shares a healthy sense of humor.

Across professional and personal roles, Dr. John S. Marshburn’s reputation rests on integrity, competence, and care. Patients trust him for his clinical judgment and gentle bedside manner; colleagues admire his leadership and mentorship; and his family values his commitment and kindness. These qualities define his work as a physician and surgeon and his life as a husband and father.