Maryland officials misused more than $20 million from a federal waiver program, according to the inspector general for the U.S. Department of Health and Human Services.

The waiver program in Maryland's Department of Health and Mental Hygiene, which goes toward home and community-based services for people with developmental disabilities, claimed $1.1 billion — $648.6 million in federal money — from July 2009 to June 2012.

The IG's office found that 95 of the 100 claims didn't comply with state and federal requirements, allowing Maryland to improperly claim $20.6 million. The 135 errors — including unallowable costs for room and board — occurred because of a lack of internal controls, the IG said.

Some recipients got up to $145.36 per day, according to the IG.

The IG recommended the Maryland agency give back the $20 million, as well as to take care to claim only allowable costs in the future — and it agreed.