Individuals who enroll in Premium-HI for the Working Disabled pay the same HI and
                  SMI premium as aged Premium-HI enrollees. For HI premium amounts, see HI 01005.005 and HI 01005.007.
               
               The HI premium for the Working Disabled is not subject to increase for late enrollment. This differs from the rule applicable to
                  individuals who enroll in Premium-HI for the Aged and are subject to a 10 percent
                  increase payable for twice the number of full twelve month periods they could have
                  been but were not enrolled. The SMI premium under the Premium-HI for the Working Disabled
                  provision is subject to increase for late enrollment following normal SMI premium increase rules.
                  No months prior to 7/90 are counted in determining the number of months to assess
                  for SMI  premium increase purposes.
               
               If an individual was paying an increased SMI premium during the last month of premium-free
                  HI entitlement, but enrolls for SMI under the Working Disabled provision during IEP,
                  the SMI premium reverts to the standard rate.
               
               States are required to pay HI (but not SMI) premiums for “qualified disabled and working individuals (QDWI).” QDWIs are individuals enrolled in Premium-HI for the Working Disabled who meet the
                  requirements in SI 01715.005. States pay HI premiums through the Part A Group Payer System.