This hierarchy contains concepts which are named, authoritative, and internationally relevant staging or grading systems used to either make a judgment about the patient, e.g. cognition, or, evaluate a patient to determine the phase, or progression of a disease.

Some diseases are represented using a staging and/or grading system to signify the severity, extent, or rate of growth of a disease. For example, chronic kidney disease is represented with five stages determined by level of kidney function.

Assessment scale requests

  • Generally, requests to add the most recent version of an assessment scale are accepted.
  • Updated versions of existing content are also accepted. 
  • Older versions may be added if justification is appropriate.  Older versions may also remain as active concepts due to the need to retain history on the use of specific instruments.  


Concepts of the type |Assessment using X assessment scale| are modeled with a proximal primitive parent of  445536008 | Assessment using assessment scale (procedure)|  or one of its subtypes, as appropriate.

For example, 

(See also Why is Content Rejected page, Proprietary Names for information about use of Questionnaire and Scale names)

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