ICD-10-CM > S00-T88 > T36-T50 > T45 > T45.7 > T45.7X > T45.7X6 > T45.7X6A T45.7X6A Underdosing of anticoagulant antagonist, vitamin K and other coagulants, initial encounter Billable/Specific Copy Code Copy Description Type 1 Excludes vitamin K deficiency (E56.1)