T40.905S — Adverse effect of unspecified psychodysleptics [hallucinogens], sequela
Is T40.905S billable?
Yes, but T40.905S is an unspecified code. T40.905S is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, T40.905S 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 T40.905S — the more specific alternatives are listed below.
More specific alternatives
- T40.0X1SPoisoning by opium, accidental (unintentional), sequela
- T40.1X1SPoisoning by heroin, accidental (unintentional), sequela
- T40.2X1SPoisoning by other opioids, accidental (unintentional), sequela
- T40.3X1SPoisoning by methadone, accidental (unintentional), sequela
- T40.411SPoisoning by fentanyl or fentanyl analogs, accidental (unintentional), sequela
- T40.5X1SPoisoning by cocaine, accidental (unintentional), sequela
- T40.711SPoisoning by cannabis, accidental (unintentional), sequela
- T40.8X1SPoisoning by lysergide [LSD], accidental (unintentional), sequela
T40.905S at a glance
| Code | T40.905S |
|---|---|
| Description | Adverse effect of unspecified psychodysleptics [hallucinogens], sequela |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "S" | sequela |
What does the 7th character "S" mean in T40.905S?
In T40.905S, the 7th character S means sequela. The 7th character is required for T40.905S to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
What Medicare edits apply to T40.905S?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name T40.905S directly.
CMS will reject this code as the principal diagnosis on an inpatient claim. It describes something other than the condition chiefly responsible for the admission.
Which MS-DRGs does T40.905S group to?
T40.905S sits in MDC 21 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.
- 922Other Injury, Poisoning and Toxic Effect Diagnoses with MCCmedical
- 923Other Injury, Poisoning and Toxic Effect Diagnoses without MCCmedical
Excludes1 — never code together — inherited from T36-T50
The conditions below can never be reported together with T40.905S on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- toxic reaction to local anesthesia in pregnancy (O29.3-)
Code first — inherited from T36-T50
The underlying condition below must be sequenced before T40.905S. T40.905S describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T40.905S to fully describe the condition. T40.905S is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T36-T50
Report an additional code alongside T40.905S to fully describe the condition. T40.905S is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T40.905S, but a patient may have both at the same time. When documentation supports it, T40.905S and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T40.905S, but a patient may have both at the same time. When documentation supports it, T40.905S and the excluded code may both be reported.
Excludes2 — not included here — inherited from T40
The conditions below are not part of T40.905S, but a patient may have both at the same time. When documentation supports it, T40.905S and the excluded code may both be reported.
- drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.-F19.-)
How long has T40.905S existed?
T40.905S 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.