Toxic encephalopathy
In Other disorders of the nervous system (G89-G99), chapter 6: Diseases of the Nervous System
8 billable codes under G92: 2 are an MCC, 3 are a CC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.
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Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers default dominant or nondominant side for hemiplegia and monoplegia, and use and sequencing of G89 pain codes, including postoperative, chronic, and neoplasm-related pain.
- Dominant/nondominant side (page 45)
- Pain - Category G89 (page 45)
All codes under G92
G92 can't be used on a claim. Pick a billable code below; grey headings group them.
- G92.0Immune effector cell-associated neurotoxicity syndrome
- G92.00Immune effector cell-associated neurotoxicity syndrome, grade unspecified
- G92.01Immune effector cell-associated neurotoxicity syndrome, grade 1
- G92.02Immune effector cell-associated neurotoxicity syndrome, grade 2
- G92.03Immune effector cell-associated neurotoxicity syndrome, grade 3
- G92.04Immune effector cell-associated neurotoxicity syndrome, grade 4
- G92.05Immune effector cell-associated neurotoxicity syndrome, grade 5
- G92.8Other toxic encephalopathy
- G92.9Unspecified toxic encephalopathy
G92 MS-DRGs
As the principal diagnosis, all 8 billable codes under G92 group to these 7 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 023 Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis with MCC or Antineoplastic Implant or Epilepsy with Neurostimulator
- DRG 024 Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCC
- DRG 091 Other Disorders of Nervous System with MCC
- DRG 092 Other Disorders of Nervous System with CC
- DRG 093 Other Disorders of Nervous System without CC/MCC
- DRG 791 Prematurity with Major Problems
- DRG 793 Full Term Neonate with Major Problems
Other codes that refer to G92
Notes on these codes point to G92.
- G90.81 Use Additional Code: toxic encephalopathy (G92.-)
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Brain Diseases
Your brain is the control center of your body. It controls your thoughts, memory, speech, and movement. It regulates the function of many organs. It's part of your nervous system, which also includes your spinal cord and peripheral nerves. The nervous system sends signals between your brain and the rest of the body. Your nerves take in information from your senses and send it to the brain to be processed. Your brain and nerves also communicate to help you move and to control your body's functions.
Read more about brain diseases on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015.
- FY2022: Subcodes were added, so G92 is no longer billable on its own. New codes for cases coded here before: G92.00 (Immune effector cell-associated neurotoxicity syndrome, grade unspecified), G92.01 (Immune effector cell-associated neurotoxicity syndrome, grade 1), G92.02 (Immune effector cell-associated neurotoxicity syndrome, grade 2), G92.03 (Immune effector cell-associated neurotoxicity syndrome, grade 3), G92.04 (Immune effector cell-associated neurotoxicity syndrome, grade 4), G92.05 (Immune effector cell-associated neurotoxicity syndrome, grade 5), G92.8 (Other toxic encephalopathy), G92.9 (Unspecified toxic encephalopathy).
ICD-9-CM equivalent
Legacy crosswalk from the CMS General Equivalence Mappings (last updated 2018).
- 323.71 Toxic encephalitis and encephalomyelitis (approximate)
- 323.72 Toxic myelitis (approximate)
- 349.82 Toxic encephalopathy (approximate)