2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Nervous System And Sense Organs 320-389 > Hereditary And Degenerative Diseases Of The Central Nervous System 330-338 > Other Extrapyramidal Disease And Abnormal Movement Disorders 333.* > 2006 ICD-9-CM Diagnosis 333.91 Stiff-man syndrome View the most recent version of ICD-9-CM 333.91 A condition characterized by persistent spasms (SPASM) involving multiple muscles, primarily in the lower limbs and trunk. The illness tends to occur in the fourth to sixth decade of life, presenting with intermittent spasms that become continuous. Minor sensory stimuli, such as noise and light touch, precipitate severe spasms. Spasms do not occur during sleep and only rarely involve cranial muscles. Respiration may become impaired in advanced cases. (Adams et al., Principles of Neurology, 6th ed, p1492; Neurology 1998 Jul;51 333.91 is a specific code that can be used to specify a diagnosis 333.91 contains 2 index entries View the ICD-9-CM Volume 1 333.* hierarchy  Index entries containing 333.91: Stiff-man syndrome 333.91 Syndrome - see also Disease stiff-man 333.91