This code system http://healthit.gov/nhin/purposeofuse defines the following codes:

CodeDisplayDefinition
TREATMENTTreatmentTreatment
PAYMENTPaymentPayment
OPERATIONSOperationsHealthcare Operations
SYSADMINSysadminSystem Administration
FRAUDFraudFraud detection
PSYCHOTHERAPYPsychotherapyUse or disclosure of Psychotherapy Notes
TRAININGTrainingUse or disclosure by the covered entity for its own training programs
LEGALLegalUse or disclosure by the covered entity to defend itself in a legal action
MARKETINGMarketingMarketing
DIRECTORYDirectoryUse and disclosure for facility directories
FAMILYFamilyDisclose to a family member, other relative, or a close personal friend of the individual
PRESENTPresentUses and disclosures with the individual present.
EMERGENCYEmergencyPermission cannot practicably be provided because of the individual's incapacity or an emergency.
DISASTERDisasterUse and disclosures for disaster relief purposes.
PUBLICHEALTHPublic HealthUses and disclosures for public health activities.
ABUSEAbuseDisclosures about victims of abuse, neglect or domestic violence.
OVERSIGHTOversightUses and disclosures for health oversight activities.
JUDICIALJudicialDisclosures for judicial and administrative proceedings.
LAWLaw EnforcementDisclosures for law enforcement purposes.
DECEASEDDeceasedUses and disclosures about decedents.
DONATIONDonationUses and disclosures for cadaveric organ, eye or tissue donation purposes
RESEARCHResearchUses and disclosures for research purposes.
THREATThreatUses and disclosures to avert a serious threat to health or safety.
GOVERNMENTGovernmentUses and disclosures for specialized government functions.
WORKERSCOMPWorker's CompDisclosures for workers' compensation.
COVERAGECoverageDisclosures for insurance or disability coverage determination
REQUESTRequestRequest of the Individual