ICD-10-CM > S00-T88 > T36-T50 > T50 > T50.7 > T50.7X > T50.7X6 T50.7X6 Underdosing of analeptics and opioid receptor antagonists Non-Billable/Non-Specific Codes T50.7X6A..., initial encounterT50.7X6D..., subsequent encounterT50.7X6S..., sequela