T48.6X4 vs T48.6X6
T48.6X4 (Poisoning by antiasthmatics, undetermined) compared with T48.6X6 (Underdosing of antiasthmatics), from the official CMS tabular data. T48.6X4 and T48.6X6 code the same substance (Acefylline) with a different intent.
Can these codes be reported together?
Same substance, different intent. T48.6X4 and T48.6X6 code the same substance (Acefylline) with a different circumstance of exposure.
From the CMS Table of Drugs and Chemicals: accidental poisoning, intentional self-harm, assault, undetermined intent, adverse effect and underdosing are mutually exclusive columns — only one of them applies to a given encounter.
Side by side
| T48.6X4Poisoning by antiasthmatics, undetermined | T48.6X6Underdosing of antiasthmatics | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) |
| Definition | Poisoning by antiasthmatics, undetermined is a non-billable ICD-10-CM category code (T48.6X4). | Underdosing of antiasthmatics is a non-billable ICD-10-CM category code (T48.6X6). |
| 7th character | The appropriate 7th character is to be added to each code from category T48 | The appropriate 7th character is to be added to each code from category T48 |
| Includes | adverse effect of correct substance properly administered poisoning by overdose of substance poisoning by wrong substance given or taken in error underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed | adverse effect of correct substance properly administered poisoning by overdose of substance poisoning by wrong substance given or taken in error underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed |
| Use additional code | code(s) to specify: manifestations of poisoning underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9) | code(s) to specify: manifestations of poisoning underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9) |
| Code first | , for adverse effects, the nature of the adverse effect, such as: adverse effect NOS (T88.7) | , for adverse effects, the nature of the adverse effect, such as: adverse effect NOS (T88.7) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources