Coding: Leverage OMOP CDM Ancestor Hierarchy Levels

[callahantiff]

Task: Currently, we are utilizing the entire ancestor hierarchy for a given concept when searching for a match. This means that when matching at the ancestor level we will include potential matches for all levels, which can be very vauge (see example below).

Concept: Leukemic infiltration of skin
Map:

AND(abnormality of the skin, 
    neoplasm, sarcoma,  
    neoplasm of the skin,    
    soft tissue sarcoma
    leukemia)

While this map is correct, it includes very broad concepts like neoplasm and sarcoma. Including hierarchical level information could provide a method for further filtering the results to get the most precise match possible. Applying that logic could convert the map above to:

Map:

AND(abnormality of the skin,  
    leukemia)

---

When: Held until the next release (v2.0.0)