T38.816Underdosing of anterior pituitary [adenohypophyseal] hormones

T38.816 is the ICD-10-CM diagnosis code for underdosing of anterior pituitary [adenohypophyseal] hormones. It belongs to category T38 (poisoning by, adverse effect of and underdosing of hormones and their synthetic substitutes and antagonists, not elsewhere classified), block T36-T50 (poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within T38.81 (poisoning by, adverse effect of and underdosing of anterior pituitary [adenohypophyseal] hormones), T38.816 is specifically for underdosing of anterior pituitary [adenohypophyseal] hormones. Related codes cover poisoning by anterior pituitary [adenohypophyseal] hormones, accidental (unintentional) (T38.811), poisoning by anterior pituitary [adenohypophyseal] hormones, intentional self-harm (T38.812), poisoning by anterior pituitary [adenohypophyseal] hormones, assault (T38.813), poisoning by anterior pituitary [adenohypophyseal] hormones, undetermined (T38.814) and adverse effect of anterior pituitary [adenohypophyseal] hormones (T38.815).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.