DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

G92 Toxic encephalopathy

  • Header · not billable

G92 is not billable. The category heads 8 billable codes in FY2027, grouped under 3 subdivisions.

Index → code

  • Bromidism, bromism → G92.8
  • Jamaicanneuropathy → G92.8
  • Encephalopathy (acute)toxic → G92.9

Where it sits

  1. Chapter 6 Diseases of the nervous system (G00-G99)
  2. G89-G99 Other disorders of the nervous system (G89-G99)
  3. G92 Toxic encephalopathy
Billable codes
8
Subdivisions
3
CC / MCC codes
3 / 2
HCC V28 codes
0
New FY2027
0
Index entries
19

Codes in G92

  1. G92.0
    Immune effector cell-associated neurotoxicity syndrome
    Header
    Code first 2, Code also 3

    Code first

    • underlying cause such as:
    • complications of immune effector cellular therapy (T80.82) T80.82

    Code also

    • , if applicable, associated signs and symptoms, such as:
    • cerebral edema (G93.6) G93.6
    • unspecified convulsions (R56.9) R56.9
  2. G92.00
    Immune effector cell-associated neurotoxicity syndrome, grade unspecified
    Billable
    Inclusion terms 1

    Inclusion terms

    • ICANS, grade unspecified
  3. G92.01
    Immune effector cell-associated neurotoxicity syndrome, grade 1
    Billable
    Inclusion terms 1

    Inclusion terms

    • ICANS, grade 1
  4. G92.02
    Immune effector cell-associated neurotoxicity syndrome, grade 2
    Billable
    Inclusion terms 1

    Inclusion terms

    • ICANS, grade 2
  5. G92.03
    Immune effector cell-associated neurotoxicity syndrome, grade 3
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • ICANS, grade 3
  6. G92.04
    Immune effector cell-associated neurotoxicity syndrome, grade 4
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • ICANS, grade 4
  7. G92.05
    Immune effector cell-associated neurotoxicity syndrome, grade 5
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • ICANS, grade 5
  8. G92.8
    Other toxic encephalopathy
    BillableMCC
    Inclusion terms 2, Code first 1, Use additional code 1

    Inclusion terms

    • Toxic encephalitis
    • Toxic metabolic encephalopathy

    Code first

    • poisoning due to drug or toxin, if applicable, (T36-T65 with fifth or sixth character 1-4) T36 T65

    Use additional code

    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) T36 T50
  9. G92.9
    Unspecified toxic encephalopathy
    BillableMCC
    Code first 1, Use additional code 1

    Code first

    • poisoning due to drug or toxin, if applicable, (T36-T65 with fifth or sixth character 1-4) T36 T65

    Use additional code

    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) T36 T50

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

Notes that also apply

Chapter 6 instructions (Excludes2 8): printed on the chapter 6 page.

Index entries

  • Bromidism, bromism → G92.8
  • Syndromeimmune effector cell-associated neurotoxicity (ICANS) → G92.00
  • Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute)toxic NEC → G92.8
  • Jamaicanneuropathy → G92.8
  • Jamaicanparaplegic tropical ataxic-spastic syndrome → G92.8
  • Leukoencephalopathyheroin vapor → G92.8
  • Meningoencephalitistoxic NEC → G92.8
  • Encephalopathy (acute)toxic → G92.9
  • Myelitis (acute) (ascending) (childhood) (chronic) (descending) (diffuse) (disseminated) (idiopathic) (pressure) (progressive) (spinal cord) (subacute)toxic → G92.9
  • Encephalopathy (acute)due todrugs → G92.8
  • Encephalopathy (acute)metabolicdrug induced → G92.8
  • Encephalopathy (acute)metabolictoxic → G92.8
  • Encephalopathy (acute)toxicmetabolic → G92.8
  • Syndromeimmune effector cell-associated neurotoxicity (ICANS)gradeunspecified → G92.00
  • Syndromeimmune effector cell-associated neurotoxicity (ICANS)grade1 → G92.01
  • Syndromeimmune effector cell-associated neurotoxicity (ICANS)grade2 → G92.02
  • Syndromeimmune effector cell-associated neurotoxicity (ICANS)grade3 → G92.03
  • Syndromeimmune effector cell-associated neurotoxicity (ICANS)grade4 → G92.04
  • Syndromeimmune effector cell-associated neurotoxicity (ICANS)grade5 → G92.05

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy