T37.8X6D

Underdosing of other specified systemic anti-infectives and antiparasitics, subsequent encounter

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

Exclusions 6 never code together

T37.8code

Excludes1

antimalarial drugs (T37.2-)T37.2-

T37code

Excludes1

anti-infectives topically used for ear, nose and throat (T49.6-)T49.6-
anti-infectives topically used for eye (T49.5-)T49.5-
locally applied anti-infectives NEC (T49.0-)T49.0-

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

D subsequent encounter this code

S sequela

Instructional notes 4

T37.8code

Inclusion terms

Poisoning by, adverse effect of and underdosing of hydroxyquinoline derivatives

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 T37.8X6

The index files this at T37.8X6. The tabular extends it — laterality, staging, or the 7th character — so these entries lead to the family rather than to T37.8X6D exactly.

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

Alongside this code 2 same parent — T37.8X6

T37.8X6A Underdosing of systemic anti-infect/parasit, init T37.8X6S Underdosing of systemic anti-infect/parasit, 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: T37.8X6
Block: T07-T88
Siblings: 2

Present FY2024–FY2027.