ICDcodes.org
FY2027

T42.71XS — Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional), sequela

BillableUnspecified

Is T42.71XS billable?

Yes, but T42.71XS is an unspecified code. T42.71XS is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, T42.71XS 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 T42.71XS — the more specific alternatives are listed below.

T42.71XS at a glance

CodeT42.71XS
DescriptionPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional), sequela
BillableYes
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027
7th character "S"sequela

What does the 7th character "S" mean in T42.71XS?

In T42.71XS, the 7th character S means sequela. The 7th character is required for T42.71XS to be a valid, complete code.

Same condition, different episode of care — switch the 7th character:

Which MS-DRGs does T42.71XS group to?

T42.71XS 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

Inclusion terms

Alternative wording in documentation that is classified to T42.71XS.

  • Poisoning by antiepileptic and sedative-hypnotic drugs NOS

Excludes1 — never code together — inherited from T36-T50

The conditions below can never be reported together with T42.71XS 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 T42.71XS. T42.71XS describes a manifestation and cannot be the principal or first-listed diagnosis.

  • , for adverse effects, the nature of the adverse effect, such as:
  • adverse effect NOS (T88.7)
  • aspirin gastritis (K29.-)
  • blood disorders (D56-D76)
  • contact dermatitis (L23-L25)
  • dermatitis due to substances taken internally (L27.-)
  • nephropathy (N14.0-N14.2)

Use additional code — inherited from Chapter 19

Report an additional code alongside T42.71XS to fully describe the condition. T42.71XS 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 T42.71XS to fully describe the condition. T42.71XS is sequenced first.

  • code(s) to specify:
  • manifestations of poisoning
  • underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)
  • underdosing of medication regimen (Z91.12-, Z91.13-)

Excludes2 — not included here — inherited from Chapter 19

The conditions below are not part of T42.71XS, but a patient may have both at the same time. When documentation supports it, T42.71XS and the excluded code may both be reported.

  • birth trauma (P10-P15)
  • obstetric trauma (O70-O71)

Excludes2 — not included here — inherited from T36-T50

The conditions below are not part of T42.71XS, but a patient may have both at the same time. When documentation supports it, T42.71XS and the excluded code may both be reported.

  • abuse and dependence of psychoactive substances (F10-F19)
  • abuse of non-dependence-producing substances (F55.-)
  • immunodeficiency due to drugs (D84.821)
  • drug reaction and poisoning affecting newborn (P00-P96)
  • pathological drug intoxication (inebriation) (F10-F19)

Excludes2 — not included here — inherited from T42

The conditions below are not part of T42.71XS, but a patient may have both at the same time. When documentation supports it, T42.71XS 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 T42.71XS existed?

T42.71XS 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.