G92.9 — Unspecified toxic encephalopathy
Is G92.9 billable?
Yes, but G92.9 is an unspecified code. G92.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, G92.9 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 G92.9 — the more specific alternatives are listed below.
More specific alternatives
G92.9 at a glance
| Code | G92.9 |
|---|---|
| Description | Unspecified toxic encephalopathy |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does G92.9 group to?
G92.9 sits in MDC 01 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.
- 023Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis with MCC or Antineoplastic Implant or Epilepsy with Neurostimulatorsurgical
- 024Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCCsurgical
As a secondary diagnosis, G92.9 is a major complication or comorbidity (MCC), which can move a stay into a higher-paying DRG.
How is G92.9 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to G92.9. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Encephalopathy › toxic (acute)
- Myelitis › toxic (acute) (ascending) (childhood) (chronic) (descending) (diffuse) (disseminated) (idiopathic) (pressure) (progressive) (spinal cord) (subacute)
Code first
The underlying condition below must be sequenced before G92.9. G92.9 describes a manifestation and cannot be the principal or first-listed diagnosis.
- poisoning due to drug or toxin, if applicable, (T36-T65 with fifth or sixth character 1-4)
Use additional code
Report an additional code alongside G92.9 to fully describe the condition. G92.9 is sequenced first.
- code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
Excludes2 — not included here — inherited from Chapter 6
The conditions below are not part of G92.9, but a patient may have both at the same time. When documentation supports it, G92.9 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
How long has G92.9 existed?
G92.9 first appears in FY2022.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.