T53.91XD — Toxic effect of unspecified halogen derivatives of aliphatic and aromatic hydrocarbons, accidental (unintentional), subsequent encounter
Is T53.91XD billable?
Yes, but T53.91XD is an unspecified code. T53.91XD is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, T53.91XD is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting T53.91XD — the more specific alternatives are listed below.
More specific alternatives
- T53.0X1DToxic effect of carbon tetrachloride, accidental (unintentional), subsequent encounter
- T53.1X1DToxic effect of chloroform, accidental (unintentional), subsequent encounter
- T53.2X1DToxic effect of trichloroethylene, accidental (unintentional), subsequent encounter
- T53.3X1DToxic effect of tetrachloroethylene, accidental (unintentional), subsequent encounter
- T53.4X1DToxic effect of dichloromethane, accidental (unintentional), subsequent encounter
- T53.5X1DToxic effect of chlorofluorocarbons, accidental (unintentional), subsequent encounter
- T53.6X1DToxic effect of other halogen derivatives of aliphatic hydrocarbons, accidental (unintentional), subsequent encounter
- T53.7X1DToxic effect of other halogen derivatives of aromatic hydrocarbons, accidental (unintentional), subsequent encounter
T53.91XD at a glance
| Code | T53.91XD |
|---|---|
| Description | Toxic effect of unspecified halogen derivatives of aliphatic and aromatic hydrocarbons, 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 T53.91XD?
In T53.91XD, the 7th character D means subsequent encounter. The 7th character is required for T53.91XD to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T53.91XD group to?
T53.91XD 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
Excludes1 — never code together — inherited from T51-T65
The conditions below can never be reported together with T53.91XD 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 T53.91XD to fully describe the condition. T53.91XD 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 T53.91XD to fully describe the condition. T53.91XD is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T53.91XD, but a patient may have both at the same time. When documentation supports it, T53.91XD and the excluded code may both be reported.
How long has T53.91XD existed?
T53.91XD 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.