Revised March 25, 2011 Purpose: The department of social and health services (DSHS) sends you letters to tell you about your case. 100 Series Reason Code Protocols 200 Series Reason Code Protocols 300 Series Reason Code Protocols 400 Series Reason Code Protocols 500 Series Reason Code Protocols Information about Letters Letters Protocols Reason Codes Book traversal links for Eligibility A-Z Manual (EA-Z) ‹ Interview Requirements Up 100 Series Reason Code Protocols ›