An Oshkosh native, Dr. Jack (John) Leschke is a dual board-certified spine surgeon having completed training in both Neurosurgery and Neurology. He received his medical degree and completed his residency in Neurology at the Medical College of Wisconsin followed by a residency in Neurosurgery at the University of Minnesota.Jack (John) Leschke MD is currently seeing patients in Fox Valley and Oshkosh.
An Oshkosh native, Dr. Jack (John) Leschke is a dual board-certified spine surgeon having completed training in both Neurosurgery and Neurology. He received his medical degree and completed his residency in Neurology at the Medical College of Wisconsin followed by a residency in Neurosurgery at the University of Minnesota.Jack (John) Leschke MD is currently seeing patients in Fox Valley and Oshkosh.
Jack (John) Leschke MD is currently seeing patients in
Fox Valley and Oshkosh.
An Oshkosh native, Dr. Jack (John) Leschke is a dual board-certified spine surgeon having completed training in both Neurosurgery and Neurology. He received his medical degree and completed his residency in Neurology at the Medical College of Wisconsin followed by a residency in Neurosurgery at the University of Minnesota.
Dr. Leschke has a specialized interest in minimally invasive spine surgery and treats a wide variety of neurological conditions of the spine including neck and back pain, spinal fractures, spinal tumors, spinal stenosis, spondylolisthesis, degenerative spine disease, spinal arthritis, pinched nerves, sciatica, and more. Some of the treatments and procedures he performs for these conditions include cervical, thoracic and lumbar diskectomy, laminectomy, spinal decompression, posterior fusion, interbody fusion, artificial disk replacement, and more.
Dr. Leschke says that the best part of his job is not only taking care of his patients and restoring their quality of life, but also being able to continuously learn the landscape of spine surgery as it evolves, improving himself for his patients.
In his free time, Dr. Leschke enjoys spending time with his wife and children. He also enjoys music in all forms, playing the piano and guitar, spending time outside or playing sports like tennis and golf.

I went from "Hopeless to Options"
On September 22nd 2025 I had a Spine Surgery at ST ELIZABETH HOSPITAL in Appleton by Dr Leschke the surgery my understanding took 3/12 hours and 6 hours recovery in the recovery room I was in the hospital 3 days upon going home which we live in GreenBay Wi I was in severe pain and discomfort pain my medication giving some relief while at home I developed an infection in the spine area where my surgery was I feel it was caused from the saturated gauze on my incision from surgery which wasn’t changed for 3 days At home I was prescribed an antibiotic for infection from Dr Letchke immediately In all respect this was wearing a neck brace from September 22 which did heal I wore the neck brace 24/7 for 6 weeks and 4 days Looking back the procedure was the most painful I have ever experienced but in the long run will have a full recovery down the road I’m able to go without out my neck brace with common sense All in all t would recommend Dr Leschke for Spine surgery he was outstanding Thankyou
Nice guy!
Very professional, explained everything he was going to do. I was treated with respect and taken seriously. My pain was terrible. After surgery I felt so much better right away. I’m very thankful.
Every thing was great always room for improvement never perfect
Dr. Leschke took the time to listen to my concerns and explained all of my options. I feel very comfortable going into my upcoming surgery.
He listened to my story and concerns.
He explained every thing clear to me and following through.thank you
Very informative
Dr Leschke is wonderfully kind and listens. He talked to me about my options and the team got back to me in a few days.