| T38.1X1 | Poisoning by thyroid hormones and substitutes, accidental (unintentional) | NON-BILLABLE CODE |
| T38.1X1A | Poisoning by thyroid hormones and substitutes, accidental (unintentional), initial encounter | BILLABLE CODE |
| T38.1X1D | Poisoning by thyroid hormones and substitutes, accidental (unintentional), subsequent encounter | BILLABLE CODE |
| T38.1X1S | Poisoning by thyroid hormones and substitutes, accidental (unintentional), sequela | BILLABLE CODE |
| T38.1X2 | Poisoning by thyroid hormones and substitutes, intentional self-harm | NON-BILLABLE CODE |
| T38.1X2A | Poisoning by thyroid hormones and substitutes, intentional self-harm, initial encounter | BILLABLE CODE |
| T38.1X2D | Poisoning by thyroid hormones and substitutes, intentional self-harm, subsequent encounter | BILLABLE CODE |
| T38.1X2S | Poisoning by thyroid hormones and substitutes, intentional self-harm, sequela | BILLABLE CODE |
| T38.1X3 | Poisoning by thyroid hormones and substitutes, assault | NON-BILLABLE CODE |
| T38.1X3A | Poisoning by thyroid hormones and substitutes, assault, initial encounter | BILLABLE CODE |
| T38.1X3D | Poisoning by thyroid hormones and substitutes, assault, subsequent encounter | BILLABLE CODE |
| T38.1X3S | Poisoning by thyroid hormones and substitutes, assault, sequela | BILLABLE CODE |
| T38.1X4 | Poisoning by thyroid hormones and substitutes, undetermined | NON-BILLABLE CODE |
| T38.1X4A | Poisoning by thyroid hormones and substitutes, undetermined, initial encounter | BILLABLE CODE |
| T38.1X4D | Poisoning by thyroid hormones and substitutes, undetermined, subsequent encounter | BILLABLE CODE |
| T38.1X4S | Poisoning by thyroid hormones and substitutes, undetermined, sequela | BILLABLE CODE |
| T38.1X5 | Adverse effect of thyroid hormones and substitutes | NON-BILLABLE CODE |
| T38.1X5A | Adverse effect of thyroid hormones and substitutes, initial encounter | BILLABLE CODE |
| T38.1X5D | Adverse effect of thyroid hormones and substitutes, subsequent encounter | BILLABLE CODE |
| T38.1X5S | Adverse effect of thyroid hormones and substitutes, sequela | BILLABLE CODE |
| T38.1X6 | Underdosing of thyroid hormones and substitutes | NON-BILLABLE CODE |
| T38.1X6A | Underdosing of thyroid hormones and substitutes, initial encounter | BILLABLE CODE |
| T38.1X6D | Underdosing of thyroid hormones and substitutes, subsequent encounter | BILLABLE CODE |
| T38.1X6S | Underdosing of thyroid hormones and substitutes, sequela | BILLABLE CODE |
