Maryland Health - General Section 19-352
§ 19-352.
  (a)   In this section, "nursing home" means a related institution that is classified as a nursing home.
  (b)   A nursing home may not assess an interest penalty on charges for services provided to a resident until, whichever is later in time:
    (1)   45 days after the nursing home mails an itemized statement of the charges to the person responsible for payment of the charges; or
    (2)   30 days after the end of the period for which the itemized statement of the charges covers.
  (c)   The nursing home shall include on the itemized statement of charges a statement in bold and conspicuous print as to when interest may be assessed consistent with the provisions of subsection (b) of this section.