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Dr. Jonathan Lloyd Fisher, MD is a neurosurgeon in San Antonio, TX specializing in neurosurgery. He graduated from Louisiana State University Health Sciences Center. Dr. Jonathan Lloyd Fisher, MD is affiliated with University Health and UT Health San Antonio.
UT Health San Antonio
Hydrocephalus
Normally, the brain is bathed in a liquid called cerebrospinal fluid. This fluid cushions and nurtures the brain cells as it flows around and through the brain. Sometimes, cerebrospinal fluid does not get reabsorbed into the body properly, or a blockage in the brain can stop it from flowing. This causes a buildup of pressure called hydrocephalus. This condition affects a wide range of people, but it is much more prevalent among infants and older adults. Left untreated, hydrocephalus can cause uncomfortable symptoms, such as headaches and blurred vision, and eventually may cause brain damage.
Hydrocephalus is most often treated with an implanted device called a shunt. A shunt is a long, thin tube that is used to drain excess fluid. One end is placed within the brain. The tube runs under the skin, along the neck behind the ear, and to another part of the body where the fluid can be reabsorbed. Most often this is the abdomen, but the chest or other areas can also be used. Shunts have a valve that allows doctors to monitor and control the pressure within the brain. Insertion of a shunt is a surgical procedure that takes one to two hours. Incisions are made in the head and the abdomen, and the shunt is threaded into place before the openings are stitched closed.
In cases where hydrocephalus is caused by a blockage, a procedure called endoscopic third ventriculostomy, or ETV, may be performed. During this procedure, a surgeon makes a dime-sized hole in the skull and uses a thin tube with a camera on the end (called an endoscope) to see inside the brain. The surgeon punctures a hole in the floor of the third ventricle, a fluid-filled space within the brain. The hole provides an opening for cerebrospinal fluid to flow around the blockage, normalizing pressure. The entire procedure usually takes less than an hour and patients can often go home the following day. ETV can provide a permanent and safe alternative to a shunt, but it is only useful for patients whose hydrocephalus is caused by a blockage.
Spinal Cord Injury
Spinal cord injury medicine is a branch of medicine that treats damage to the spinal cord from an injury or a nontraumatic myelopathy, which is any disorder that affects the spinal area. The spinal cord is a section of nerve tissue protected by the vertebrae (spinal bones). Trauma to the spinal cord, typically caused by compression or bent vertebrae, prevents the body and brain from communicating. This can result in pain, loss of sensation, and impaired physical function and movement. Acute spinal cord injuries (SCIs) are a leading cause of permanent disability. Spinal cord injuries may develop from accidents or myelopathies, disorders that provoke spinal compression. Traumatic incidents such as falls, sports injuries, vehicle accidents, and bullet or stab wounds can cause an acute spinal cord injury.
Spinal cord injury medicine seeks to stabilize the spine and to alleviate the symptoms of spine damage. Practitioners of spinal cord injury medicine are called spinal cord injury specialists. Spinal cord injury medicine is an interdisciplinary field, meaning physicians of various specialties may be trained to treat spinal cord injuries.
Damage to the spinal cord may initially be diagnosed through X-ray, MRI, or CT scans. Patients can also undergo spinal exams to evaluate their sensory ability and strength. Injuries to the spinal cord can be complete (no feeling or sensation) or incomplete (some feeling or sensation remains). Conditions spinal cord injury medicine specialists may treat include:
Treatment for spinal cord injuries often involves surgery, either directly after an injury occurs or at a later date. Surgery for spine injuries is intended to ease spinal compression and stabilize the spine. Surgical procedures can involve shifting vertebrae, removing bone, or altering spinal placement with implantable devices. Patients with significant spinal trauma may require urgent surgical intervention.
Surgical treatments can be complemented by rehabilitative physical therapy to improve mobility. Spinal cord injury specialists also treat complications arising from a spinal injury, such as respiratory or bladder conditions. Some patients with spinal cord injuries may require lifelong treatment. Spinal cord injury specialists aim to help these patients successfully adjust and lead an improved quality of life. An emerging treatment for spinal cord injuries is neural prosthetics, which replicate patients' lost nerve function. Neural prostheses may be used as artificial body parts or assistive devices that patients may cognitively control. Other assistive devices include wheelchairs and scooters.
Spinal cord injury specialists may collaborate with physical therapists, radiologists, neurologists, urologists, and orthopedists.
Dr. Jonathan Lloyd Fisher, MD graduated from Louisiana State University Health Sciences Center. He completed residency at University of Texas Health Science Center at San Antonio and Affiliated Hospitals. He has a state license in Texas.
Medical School: Louisiana State University Health Sciences Center
Residency: University of Texas Health Science Center at San Antonio and Affiliated Hospitals (2025)
Licensed In: Texas
Dr. Jonathan Lloyd Fisher, MD is associated with these hospitals and organizations:
Dr. Jonathan Lloyd Fisher, MD appears to accept the following insurance providers: MultiPlan, Prime Health, United Healthcare HMO, United Healthcare EPO, Blue Choice, Galaxy Health Network, Coventry, Blue California, Trustmark , WellCare Medicare Advantage, BlueCross BlueShield of Texas, AARP, Medicare Advantage, TriWest, HealthSpring, United Healthcare, Three Rivers, Medicaid, Humana, Cigna, Molina Healthcare, First Health, WellPoint, Employers Health Network, HealthSmart, Superior Health Plan, Independent Medical Systems - Commercial (PPO), Administrative Concepts - Third Party Administrator, Kempton Group Administrators - Third Party Administrator, CHAMPVA - Governmental, Zelis - Third Party Administrator, Century Healthcare - Third Party Administrator, El Paso Health - CHIP, Key Benefits Administrators - Third Party Administrator, OptumHealth - Transplant Network, 6 Degrees - Transplant, Oscar - Commercial Exchange, Imperial Health - Commercial (Exchange), Provider Network of America - Commercial (All Products), Entrust - Third Party Administrator, SANA Benefits - Commercial (All Products), HMA LLC - Third Party Administrator, Aetna Health - Commercial (HMO, Managed Choice POS, Meritain, Open Choice PPO), Allied Benefit Systems - Third Party Administrator, Velocity National Provider Network - Commercial (Multiple Payers), Universal Benefits Consortium (Allegiance) - Direct Contract with TPA/Broker for select ISDs, Private Healthcare Systems - Commercial (All Products), Aetna Health - Commercial (QPOS, SAISD, Select), Injury Management Organization - Workers Compensation, Benefit Administrative Systems - Third Party Administrator, Tokio Marine - Transplant Network, Group and Pension Administrators - Third Party Administrator, EBSO Benefits - Third Party Administrator, Aetna Health - Commercial (Choice POS II, Elect Choice EPO, Exchange (Silver/Gold HMO)), Allegiance - Universal Benefits Consortium, Interlink - Transplant Network, Independent Medical Systems - Workers Compensation, Lucent Health - Third Party Administrator, Imagine 360 - Third Party Administrator, Curative - Commercial (All Products), Aetna Health - Transplant ONLY, Insurance Accepted, Veterans Administration - Governmental, Velocity National Provider Network - Commercial (PPO), Ancira Enterprises - Direct Employer, WebTPA - Third Party Administrator, International Benefits Administrators - Third Party Administrator, Gilsbar - Third Party Administrator, University of Incarnate Word - Direct Contact with Employer, Scott & White Health Plan - Commercial (Exchange, HMO, PPO), LifeTrac - Transplant Network, 90 Degree Benefits - Third Party Administrator, Point Comfort Underwriters - Refugee Medical Assistance (Adults, Children) and Aetna Better Health - CHIP/CHIP Perinate Newborn.
According to our sources, Dr. Jonathan Lloyd Fisher, MD accepts the following insurance providers:
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Dr. Jonathan Fisher practices neurosurgery in San Antonio, TX. Dr. Fisher's clinical interests include neurofibroma, sports health, and cervical dystonia (spasmodic torticollis). His professional affiliations include UT Health San Antonio and the University Health. He accepts Trustmark, Aetna EPO, Blue California, and more. According to UT Health San Antonio, Dr. Fisher is currently accepting new patients at his office in San Antonio, TX. Before performing his residency at a hospital affiliated with the University of Texas Health Science Center at San Antonio, Dr. Fisher attended Louisiana State University Health Sciences Center for medical school.
