This case-sensitive code system http://hl7.org/fhir/us/davinci-ra/CodeSystem/coding-gap-task-reason defines the following codes:

Code	Display	Definition
closure	Close coding gap	Task reason is to provide clinical evalaution evidence to close a risk adjustment coding gap.
invalidation-never-had-condition	Invalidate coding gap, patient never had the condition	Task reason is to provide clinical evalaution evidence to invalidate the coding gap that was inaccurate because the patient has never had this condition.
invalidation-inactive-condition	Invalidate coding gap, condition no longer active	Task reason is to provide clinical evalaution evidence to invalidate the coding gap because the patient was correctly diagnosed but the condition is no longer active.
invalidation-inaccurate-gap	Invalidate coding gap, inaccurate gap	Task reason is to provide clinical evalaution evidence to invalidate the coding gap because the patient has an active condition but the gap does not accurately describe it.
creation	Create coding gap	Task reason is provide clinical evaluation evidence to create and close a net-new risk adjustment coding gap discovered during medical review.