On September 23, 2005, a Notice of Violation and Proposed Imposition of Civil Penalties in the cumulative amount of $19, 200, was issued for three Severity Level II problems, one Severity Level II violation, and two Severity Level IV violations, associated with brachytherapy treatments that resulted in unintended radiation doses to five patients. Because these violations directly contributed to significant health consequences for Patients Nos. 3, 4, and 5, each of those three events is categorized as a separate Severity Level II problem in accordance with the NRC Enforcement Policy. In addition, the licensee became aware that three medical events had occurred and did not notify the NRC of the events until more than one day after the medical events were discovered, contrary to 10 CFR 35.3045(c) that requires licensees to notify the NRC Operations Center, by telephone, no later than the next calendar day after discovery of such events. The events associated with Patients Nos. 1 and 2 are categorized as separate examples of a Severity Level IV problem in accordance with the NRC Enforcement Policy due to the more limited health consequences associated with these medical events.