"For Want of a Dentist"

Lead metro story in today's Washington Post:

http://www.washingtonpost.com/wp-dyn/content/article/2007/02/27/AR2007022702116.html

They made dozens of calls trying to find a dentist that took Medicaid. Three different jobs provided no health insurance. Then the Medicaid coverage was lost, probably because paperwork never reached them, probably because the family was so transient.

Which brings us to this: "In spite of efforts to change the system, fewer than one in three children in Maryland's Medicaid program received any dental service at all in 2005, the latest year for which figures are available from the federal Centers for Medicare and Medicaid Services."

Can a lawsuit change the system? Can healthcare providers be required to take Medicaid?