DBMD = Deaf + Blind + Another Disability 

Intervener

An intervener facilitates access to information for an individual who is deafblind. Similar to a sign language interpreter for the deaf, but with an additional level of one-on-one support, interveners use a variety of modes including visual or tactile sign language, or through an oral/aural approach.

More on interveners from TSBVI

Medicaid Waiver Program

Federal funds for Medicaid Waiver Programs are administered by the state for specific groups of individuals with special needs.

DBMD Waiver

Established to address the specific needs of those who are deaf and blind after the rubella epidemic of 1960s. Key to this waiver is inclusion of Intervener services.
More info from HHS  

Causes of Deafblindness

Congenital conditions, including CMV and the genetic disorder Charge syndrome, and complications from prematurity are leading causes of deafblindness.

More info from National Center on Deafblindness