ICD-10-CM > E00-E89 > E00-E07 > E03 > E03.2 E03.2 Hypothyroidism due to medicaments and other exogenous substances Billable/Specific Copy Code Copy Description Code First poisoning due to drug or toxin, if applicable (T36-T65 with fifth or sixth character 1-4) Use Additional code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)