This value set includes codes based on the following rules:

• Include these codes as defined in http://snomed.info/sct version http://snomed.info/sct/731000124108/version/20200901

  Code	Display
  62479008	AIDS
  60169008	Antacid Medications
  230732009	Giant cell (temporal) arteritis
  13645005	Chronic obstructive pulmonary disease (COPD)
  34000006	Crohn's disease
  73211009	Diabetes mellitus (disorder)
  420868002	Diabetes mellitus Type 1
  422014003	Diabetes mellitus Type 2
  56265001	Heart Disease (specify)
  161663000	Organ transplant (specify)
  161693006	kidney dialysis
  118599009	Hodgkin's Lymphoma
  385353004	HIV (no AIDS)
  707311008	immunosuppressants
  226034001	Injection drug user
  60737008	Hemochromatosis/iron overload
  93143009	Leukemia
  200936003	Lupus
  118600007	Lymphoma
  363346000	Cancer
  109989006	Multiple myeloma
  425333006	Myeloproliferative disorder
  118601006	Non-Hodgkins's Lymphoma
  69896004	Rheumatoid arthritis
  31541009	Sarcoidosis
  417357006	Sickle cell disease
  234319005	Splenectomy/asplenia
  64766004	Ulcerative colitis

• Include these codes as defined in urn:oid:2.16.840.1.114222.4.5.274 version 20200526

  Code	Display
  PHC1994	Cancer Chemotherapy
  PHC2091	Cirrhosis/advanced liver disease
  PHC1993	Corticosteroids/steroids
  PHC1996	Excessive alcohol use
  PHC1997	No underlying conditions, medication or treatments (previously healthy)
  PHC2037	Other cancer/malignancy (specify)
  PHC1995	Other immunosuppressive therapy (specify)
  PHC1992	Pregnancy

• Include these codes as defined in http://terminology.hl7.org/CodeSystem/v3-NullFlavor version 20090501

  Code	Display
  OTH	Other (specify)
  UNK	Unknown