T43.606A

Underdosing of unspecified psychostimulants, initial encounter

Billable FY2026 2025-10-01 → 2026-09-30

This is the unspecified option. 2 more specific codes sit alongside it. Worth checking whether the documentation supports one of them.

Exclusions 9 never code together

T43code

Excludes1

appetite depressants (T50.5-)T50.5-
barbiturates (T42.3-)T42.3-
benzodiazepines (T42.4-)T42.4-
methaqualone (T42.6-)T42.6-
psychodysleptics [hallucinogens] (T40.7-T40.9-)T40.7-T40.9

Excludes2

drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.- -F19.-)F10.-F19.-

T43.6code

Excludes1

poisoning by, adverse effect of and underdosing of cocaine (T40.5-)T40.5-

S00-T88chapter

Excludes2

birth trauma (P10-P15)P10-P15
obstetric trauma (O70-O71)O70-O71

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Excludes2 — not included here, but the patient may have both. Code both when documented.

7th character 3

A initial encounter this code

D subsequent encounter

S sequela

Instructional notes 3

S00-T88chapter

Notes

Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

Use additional code

code to identify any retained foreign body, if applicable (Z18.-)Z18.-

Index entries leading here 2 filed at T43.606

The index files this at T43.606. The tabular extends it — laterality, staging, or the 7th character — so these entries lead to the family rather than to T43.606A exactly.

Noncompliance Z91.199
- with
  - medication regimen NEC Z91.148
    - underdosing Z91.148
Underdosing Z91.14

Alongside this code 2 same parent — T43.606

T43.606D Underdosing of unspecified psychostimulants, subs encntr T43.606S Underdosing of unspecified psychostimulants, sequela

Additional references

AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable: yes
Code set: FY2026
Parent: T43.606
Block: T07-T88
Siblings: 2

Present FY2024–FY2027.