T65.3X1D — Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, accidental (unintentional), subsequent encounter
Is T65.3X1D billable?
Yes — T65.3X1D is billable for FY2027. T65.3X1D is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. T65.3X1D may be submitted for encounters from October 1, 2026 through September 30, 2027.
T65.3X1D at a glance
| Code | T65.3X1D |
|---|---|
| Description | Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, accidental (unintentional), subsequent encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "D" | subsequent encounter |
What does the 7th character "D" mean in T65.3X1D?
In T65.3X1D, the 7th character D means subsequent encounter. The 7th character is required for T65.3X1D to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T65.3X1D group to?
T65.3X1D sits in MDC 23 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 949Aftercare with CC/MCCmedical
- 950Aftercare without CC/MCCmedical
Inclusion terms
Alternative wording in documentation that is classified to T65.3X1D.
- Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues NOS
Excludes1 — never code together — inherited from T51-T65
The conditions below can never be reported together with T65.3X1D on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- contact with and (suspected) exposure to toxic substances (Z77.-)
Use additional code — inherited from Chapter 19
Report an additional code alongside T65.3X1D to fully describe the condition. T65.3X1D is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T51-T65
Report an additional code alongside T65.3X1D to fully describe the condition. T65.3X1D is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T65.3X1D, but a patient may have both at the same time. When documentation supports it, T65.3X1D and the excluded code may both be reported.
How long has T65.3X1D existed?
T65.3X1D has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.