How long is life span for parkinson's diagnosis?

Depend: It depends on severity and with or without other medical problems. Sometimes people died because of other medical problem, not parkinson.

Unpredictable: Here is a good reference: http://www.Mayoclinic.Com/health/parkinsons-disease/ds00295.

Large Variation: The severity of the disease is not always consistent form person to person. Also at what stage/hoehn and yahr scale? Early diagnosis and pharmacologic treatment can extend life expectancy.