Our services

At a glance
  • Small Fiber Biopsy

    The only way to definitively diagnosis small fiber neuropathy is through a skin biopsy. Small fiber neuropathy results from damage to the small, unmyelinated nerve fibers that convey pain and temperature sensations. Routine neurological exams such as EMG and nerve conduction studies can often be normal in patients with isolated small fiber neuropathy. The physician […]

  • Botox Injections

    This new and specialized revolutionary treatment has been very effective in helping select patients with diagnoses of migraines, headaches, dystonia, blepharospasm, torticollis, hemiplegia, muscle spasms, and multiple sclerosis.

  • Diagnostic Testing

    Nerve Conduction Studies Electromyography (muscle testing/EMG) Electroencephalography Readings (EEG) Lumbar Puncture Evoked Potential Ambulatory EEG’s (new service offered) Botox Injections for appropriate neurologic conditions Nerve Injections

  • Muscle Testing

    Electromyography (EMG), often is done along with a nerve conduction velocity study, (NCV) which measures your muscle and nerve electrical activity. A small needle is placed in your muscles, and the results are recorded on a special machine. These tests are used to help determine if a person’s muscle weakness, pain, or numbness are due […]

Welcome to Lakeside Neurocare

Lakeside Neurocare Limited is proud to have been providing patients in the Oshkosh, Fond du Lac and surrounding communities in Wisconsin with highly specialized neurologic care for the past 40 years. Lakeside Neurocare was founded in 1976 by Kenneth M. Viste, Jr. Dr. Xian-Feng Gu, the current owner of Lakeside Neurocare, works tirelessly for his patients and is the advocate they need to help diagnose, treat, and live with their neurologic condition. Dr. Gu's career has been devoted and dedicated to treating patients with neurologic conditions.

  • Loss of bowel/bladder control
  • Neck pain
  • Back pain
  • Spinal discomfort
  • Confusion
  • Memory loss
  • Dementia
  • Head trauma
  • Headache
  • Dizziness
  • Vertigo
  • Altered Vision
  • Loss or alteration of taste
  • Loss or alteration of smell
  • Hearing loss
  • Tinnitus (ringing in ears)
  • Neuralgia
  • Limb Pain
  • Nerve compression
  • Carpal tunnel syndrome
  • Sciatica
  • Tremor
  • Seizure
  • Hyperactivity
  • Altered bodily sensation
  • Incoordination
  • Imbalance
  • Abnormal movements
  • Foot drop
  • Learning disability
  • Loss or alteration of consciousness
  • Difficulty walking

Our Staff

Providers With Over 40 years of experience
Dr. Xian-feng Gu, M.D.

Xian-feng Gu, M.D., joined Lakeside Neurocare in 1995 with a collaborative vision to provide patients with comprehensive neurology services as well as education and encouragement, and being an active partner in the management of their neurologic needs. Dr. Gu practices general neurology and has...

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Dr. Mark T Szmanda, D.O.

Mark T Szmanda, D.O. attended University of Osteopathic Medicine in Des Moines, Iowa and performed his Residency at the University of Wisconsin, Madison. Dr. Szmanda comes to us with over 25 years’ experience in neurology and is board certified. Lakeside Neurocare feels privileged to...

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Dr. Victor Diaz-Cotrina, M.D.

Victor Diaz-Cotrina, M.D., joined Lakeside Neurocare in 2009. Dr. Diaz lives in the Fond du Lac area. Dr. Diaz received his medical degree from the Universidad Nacional de Trujillo in Peru. Dr. Diaz performed his internship at Mount Sinai Medical Center in Florida and his residency at the University...

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Our Philosophy

A patient that needs a neurologist, typically is faced with a chronic condition that will need periodic evaluation and on-going treatment. Some of these conditions are more debilitating than others. Whatever your neurologic condition, Lakeside Neurocare is dedicated to providing healthcare tailored to our patient's individual needs. This is accomplished through professional collaboration and teamwork with other healthcare providers and professionals, therapists, social workers and family members.