Too few
Thrombocytopenia
Nonfunctional
Aspirin
Von Willebrand disease
Thrombocytopenia
Aspirin
Von Willebrand disease
Acquired (Drug Related)
Warfarin (Coumadin)
Unfractionated heparin
Low molecular weight heparin (i.e. enoxaparin (Lovenox), dalteparin)
Factor Xa Inhibitors (e.g. rivaroxaban, apixaban, fondaparinux, edoxaban)
Direct thrombin inhibitors (e.g. dabigatran, argatroban, bivalirudin)
Illness induced<unk> 
Disseminated Intravascular Coagulation (DIC)
Liver disease induced coagulopathy
Uremic bleeding syndrome
Genetic
Hemophilia
Factor VIII inhibitor
Lupus anticoagulant
Warfarin (Coumadin)
Unfractionated heparin
Low molecular weight heparin (i.e. enoxaparin (Lovenox), dalteparin)
Factor Xa Inhibitors (e.g. rivaroxaban, apixaban, fondaparinux, edoxaban)
Direct thrombin inhibitors (e.g. dabigatran, argatroban, bivalirudin)<unk> 
Disseminated Intravascular Coagulation (DIC)
Liver disease induced coagulopathy
Uremic bleeding syndrome
Hemophilia
Factor VIII inhibitor
Lupus anticoagulant<unk><unk>  B<unk> es<unk>  B1<unk>  (Thiamine)
Beriberi
Wernicke-Korsakoff syndrome<unk>  B3<unk>  (Pellagra)<unk>  B9<unk>  (Folate)<unk>  B7<unk>  (Biotin)<unk>  B12<unk> <unk>  (Scurvy)<unk>  (Rickets)<unk> <unk><unk>  B1<unk>  (Thiamine)
Beriberi
Wernicke-Korsakoff syndrome<unk>  B3<unk>  (Pellagra)<unk>  B9<unk>  (Folate)<unk>  B7<unk>  (Biotin)<unk>  B12<unk> 
Beriberi
Wernicke-Korsakoff syndrome
Vitamin K deficiency
Too few
Heparin-Induced Thrombocytopenia 
Thrombocytopenia
Factor V Leiden
Nonfunctional
Liver disease induced coagulopathy
Aspirin