kode icd 10 geaK21.9 is a billablespecific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM K21.9 became effective on OctoberA09 is a billablespecific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM A09 became effective on October 1,