The part of a SNOMED CT expression that represents the primary clinical idea.

Typically the focus concept is a clinical finding, procedure, observable entity. However, it may be a concept from any domain that can be refined in accordance with concept model rules.
The focus concept may have a refinement that provides more detailed information.
The focus concept may be given context by a surrounding context wrapper.

The 66308002 | Fracture of humerus| is the focus concept in the following three examples:
Example 1: Focus concept with a refinement that indicates the type and location of the fracture.
66308002 |fracture of humerus| :                                                                 ⬅︎ Focus concept
  { 363698007 |finding site| = 20760004 |shaft of humerus| ,                     ⬅︎ Refinement
     116676008 |associated morphology| = 73737008 |Fracture, spiral| }     ⬅︎     ...
Example 2: Focus concept in a context wrapper the fracture of the humerus is past history rather than a current condition.
312850006 |History of disorder (situation)| : ⬅︎ Context wrapper
{ 66308002 |fracture of humerus| } ⬅︎ Focus concept
Example 3: Focus concept in a context wrapper with a refinement to add more detailed information.
312850006 |History of disorder (situation)| :                                                     ⬅︎ Context wrapper
{ 246090004 |Associated finding| = 66308002 |fracture of humerus| :            ⬅︎ Focus concept
        { 363698007 |finding site| = 20760004 |shaft of humerus| ,                   ⬅︎ Refinement
           116676008 |associated morphology| = 73737008 |Fracture, spiral| }   ⬅︎     ...
}

Related Links

focus concept