• Include these codes as defined in http://terminology.hl7.org/CodeSystem/v2-0256 version 2.9

  Code	Display
  10D	10 days
  10M	10 minutes post challenge
  12H	12 hours post challenge
  15M	15 minutes post challenge
  1H	1 hour post challenge
  1L	1 month (30 days) post challenge
  1M	1 minute post challenge
  1W	1 week
  2.5H	2 1/2 hours post challenge
  20M	20 minutes post challenge
  24H	24 hours post challenge
  25M	25 minutes post challenge
  2D	2 days
  2H	2 hours post challenge
  2L	2 months (60 days) post challenge
  2M	2 minutes post challenge
  2W	2 weeks
  30M	30 minutes post challenge
  3D	3 days
  3H	3 hours post challenge
  3L	3 months (90 days) post challenge
  3M	3 minutes post challenge
  3W	3 weeks
  4D	4 days
  4H	4 hours post challenge
  4M	4 minutes post challenge
  4W	4 weeks
  5D	5 days
  5H	5 hours post challenge
  5M	5 minutes post challenge
  6D	6 days
  6H	6 hours post challenge
  6M	6 minutes post challenge
  7D	7 days
  7H	7 hours post challenge
  7M	7 minutes post challenge
  8H	8 hours post challenge
  8H SHIFT	8 hours aligned on nursing shifts
  8M	8 minutes post challenge
  9M	9 minutes post challenge
  BS	Baseline (time just before the challenge)
  PEAK	The time post drug dose at which the highest drug level is reached (differs by drug)
  RANDOM	Time from the challenge, or dose not specified. (random)
  TROUGH	The time post drug dose at which the lowest drug level is reached (varies with drug)

This value set expansion contains 44 concepts.