This code system http://snomed.info/sct defines the following codes:

CodeDisplay
285390004Recommendation to change carbohydrate intake (procedure)
46635009Diabetes mellitus type 1 (disorder)
44054006Diabetes mellitus type 2 (disorder)
11687002Gestational diabetes mellitus (disorder)
609561005Maturity-onset diabetes of the young (disorder)
426875007Latent autoimmune diabetes mellitus in adult (disorder)
714628002Prediabetes (finding)
73211009Diabetes mellitus (disorder)
25305005Long-acting insulin (substance)
411531001Short-acting insulin (substance)
67866001Insulin (substance)
74964007Other (qualifier value)
789480007Insulin dose (observable entity)
61968008Syringe, device (physical object)
69805005Insulin pump
701750003Subcutaneous glucose sensor
405157008Personal health status (observable entity)
84626001Nutritional value, function (observable entity)
67866001Insulin (substance)
434910001Interstitial fluid glucose concentration (observable entity)