This code system http://terminology.hl7.org/CodeSystem/allergyintolerance-verification defines the following codes:
\n \n \n \n \n \n Lvl\n \n | \n \n \n \n Code\n \n | \n \n \n \n Display\n \n | \n \n \n \n Definition\n \n | \n \n
\n \n \n \n 1 | \n \n unconfirmed\n \n \n \n | \n \n Unconfirmed | \n \n The propensity for a reaction to the identified substance has not been objectively verified. | \n \n
\n \n \n \n 2 | \n \n presumed\n \n \n \n | \n \n Presumed | \n \n The available clinical information supports a high liklihood of the propensity for a reaction to the identified substance. | \n \n
\n \n \n \n 1 | \n \n confirmed\n \n \n \n | \n \n Confirmed | \n \n The propensity for a reaction to the identified substance has been objectively verified (which may include clinical evidence by testing, rechallenge, or observation). | \n \n
\n \n \n \n 1 | \n \n refuted\n \n \n \n | \n \n Refuted | \n \n A propensity for a reaction to the identified substance has been disputed or disproven with a sufficient level of clinical certainty to justify invalidating the assertion. This might or might not include testing or rechallenge. | \n \n
\n \n \n \n 1 | \n \n entered-in-error\n \n \n \n | \n \n Entered in Error | \n \n The statement was entered in error and is not valid. | \n \n
\n \n