T65.853D — Toxic effect of medetomidine, assault, subsequent encounter
Is T65.853D billable?
Yes — T65.853D is billable for FY2027. T65.853D is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. T65.853D may be submitted for encounters from October 1, 2026 through September 30, 2027. T65.853D is new in FY2027.
T65.853D at a glance
| Code | T65.853D |
|---|---|
| Description | Toxic effect of medetomidine, assault, subsequent encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "D" | subsequent encounter |
| FY2027 change | New in FY2027 |
What does the 7th character "D" mean in T65.853D?
In T65.853D, the 7th character D means subsequent encounter. The 7th character is required for T65.853D to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T65.853D group to?
T65.853D 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 T65.853D 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 T65.853D to fully describe the condition. T65.853D 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 T65.853D to fully describe the condition. T65.853D is sequenced first.
Use additional code — inherited from T65.85
Report an additional code alongside T65.853D to fully describe the condition. T65.853D is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T65.853D, but a patient may have both at the same time. When documentation supports it, T65.853D and the excluded code may both be reported.