ICD-9 Diagnosis Code 333.91

Stiff-man syndrome

Diagnosis Code 333.91

ICD-9: 333.91
Short Description: Stiff-man syndrome
Long Description: Stiff-man syndrome
This is the 2014 version of the ICD-9-CM diagnosis code 333.91

Code Classification
  • Diseases of the nervous system
    • Hereditary and degenerative diseases of the central nervous system (330-337)
      • 333 Other extrapyramidal disease and abnormal movement disorders

Information for Patients

Neuromuscular Disorders

Neuromuscular disorders affect the nerves that control your voluntary muscles. Voluntary muscles are the ones you can control, like in your arms and legs. Your nerve cells, also called neurons, send the messages that control these muscles. When the neurons become unhealthy or die, communication between your nervous system and muscles breaks down. As a result, your muscles weaken and waste away. The weakness can lead to twitching, cramps, aches and pains, and joint and movement problems. Sometimes it also affects heart function and your ability to breathe.

Examples of neuromuscular disorders include

  • Amyotrophic lateral sclerosis
  • Multiple sclerosis
  • Myasthenia gravis
  • Spinal muscular atrophy

Many neuromuscular diseases are genetic, which means they run in families or there is a mutation in your genes. Sometimes, an immune system disorder can cause them. Most of them have no cure. The goal of treatment is to improve symptoms, increase mobility and lengthen life.

  • Apraxia
  • Hand or foot spasms
  • Muscle atrophy
  • Muscle function loss
  • Muscle twitching
  • Myotonia congenita
  • Spasticity

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