T52.1X4D — Toxic effect of benzene, undetermined, subsequent encounter
Is T52.1X4D billable?
Yes — T52.1X4D is billable for FY2027. T52.1X4D is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. T52.1X4D may be submitted for encounters from October 1, 2026 through September 30, 2027.
T52.1X4D at a glance
| Code | T52.1X4D |
|---|---|
| Description | Toxic effect of benzene, undetermined, 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 T52.1X4D?
In T52.1X4D, the 7th character D means subsequent encounter. The 7th character is required for T52.1X4D to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T52.1X4D group to?
T52.1X4D 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 T52.1X4D 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.-)
Excludes1 — never code together — inherited from T52
The conditions below can never be reported together with T52.1X4D on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- halogen derivatives of aliphatic and aromatic hydrocarbons (T53.-)
Excludes1 — never code together — inherited from T52.1
The conditions below can never be reported together with T52.1X4D on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Use additional code — inherited from Chapter 19
Report an additional code alongside T52.1X4D to fully describe the condition. T52.1X4D 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 T52.1X4D to fully describe the condition. T52.1X4D is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T52.1X4D, but a patient may have both at the same time. When documentation supports it, T52.1X4D and the excluded code may both be reported.
How long has T52.1X4D existed?
T52.1X4D 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.