T40.603D — Poisoning by unspecified narcotics, assault, subsequent encounter
Is T40.603D billable?
Yes, but T40.603D is an unspecified code. T40.603D is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, T40.603D 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 T40.603D — the more specific alternatives are listed below.
More specific alternatives
- T40.0X1DPoisoning by opium, accidental (unintentional), subsequent encounter
- T40.1X1DPoisoning by heroin, accidental (unintentional), subsequent encounter
- T40.2X1DPoisoning by other opioids, accidental (unintentional), subsequent encounter
- T40.3X1DPoisoning by methadone, accidental (unintentional), subsequent encounter
- T40.411DPoisoning by fentanyl or fentanyl analogs, accidental (unintentional), subsequent encounter
- T40.5X1DPoisoning by cocaine, accidental (unintentional), subsequent encounter
- T40.711DPoisoning by cannabis, accidental (unintentional), subsequent encounter
- T40.8X1DPoisoning by lysergide [LSD], accidental (unintentional), subsequent encounter
T40.603D at a glance
| Code | T40.603D |
|---|---|
| Description | Poisoning by unspecified narcotics, 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 |
What does the 7th character "D" mean in T40.603D?
In T40.603D, the 7th character D means subsequent encounter. The 7th character is required for T40.603D to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T40.603D group to?
T40.603D 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 T36-T50
The conditions below can never be reported together with T40.603D 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 T40.603D. T40.603D describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T40.603D to fully describe the condition. T40.603D 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 T40.603D to fully describe the condition. T40.603D is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T40.603D, but a patient may have both at the same time. When documentation supports it, T40.603D and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T40.603D, but a patient may have both at the same time. When documentation supports it, T40.603D and the excluded code may both be reported.
Excludes2 — not included here — inherited from T40
The conditions below are not part of T40.603D, but a patient may have both at the same time. When documentation supports it, T40.603D 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 T40.603D existed?
T40.603D 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.