ICD-10-CM > D50-D89 > D65-D69 > D69 > D69.5 D69.5 Secondary thrombocytopenia Non-Billable/Non-Specific Type 1 Excludes heparin induced thrombocytopenia (HIT) (D75.82-)transient thrombocytopenia of newborn (P61.0) Codes D69.51Posttransfusion purpuraD69.59Other secondary thrombocytopenia