Original
2017 ICD10 code for Multiple System Atrophy: G90.3
http://www.icd10data.com/ICD10CM/Codes/G00-G99/G89-G99/G90-/G90.3
2015 ICD9-CM code for Multiple System Atrophy: 333.0
http://www.icd9data.com/2015/Volume1/320-389/330-337/333/333.0.htm
US Social Security Compassionate Care Allowance description of Multiple System Atrophy: https://secure.ssa.gov/poms.nsf/lnx/0423022630