T65.6X4A vs T65.6X4D
T65.6X4A (Toxic effect of paints and dyes, not elsewhere classified, undetermined, initial encounter) compared with T65.6X4D (Toxic effect of paints and dyes, not elsewhere classified, undetermined, subsequent encounter), from the official CMS tabular data. T65.6X4A and T65.6X4D code the same injury at a different phase of treatment.
Can these codes be reported together?
Same injury, other encounter phase. T65.6X4A and T65.6X4D code the same injury at a different phase of treatment, set by the 7th character.
The 7th character records the type of care given at the encounter being coded (ICD-10-CM Official Guidelines, Section I.C.19.a), so one encounter takes one of these, not both.
Side by side
| T65.6X4AToxic effect of paints and dyes, not elsewhere classified, undetermined, initial encounter | T65.6X4DToxic effect of paints and dyes, not elsewhere classified, undetermined, subsequent encounter | |
|---|---|---|
| Billing status | Billable | Billable |
| 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 | Toxic effect of paints and dyes, not elsewhere classified, undetermined, initial encounter is a billable ICD-10-CM diagnosis code (T65.6X4A). | Toxic effect of paints and dyes, not elsewhere classified, undetermined, subsequent encounter is a billable ICD-10-CM diagnosis code (T65.6X4D). |
| 7th character | The appropriate 7th character is to be added to each code from category T65 | The appropriate 7th character is to be added to each code from category T65 |
| Use additional code | code(s): for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70) personal history of foreign body fully removed (Z87.821) | code(s): for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70) personal history of foreign body fully removed (Z87.821) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources