ICD-10 · PDGM grouping
G92 Toxic encephalopathy
All 8 codes in the G92 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
Codes in family
8
Can lead a claim
0
Cannot lead a claim
8
What CMS assigns to G92
None of the 8 codes is assigned a clinical group. None of the 8 is assigned a comorbidity subgroup. None can lead a claim. CMS attaches a code-first note to all 8.
Code first
CMS grouper convention 13, on G92.8, G92.9. Code first:
- poisoning due to drug or toxin, if applicable (T36-T65 with fifth or sixth character 1-4)
CMS grouper convention 43, on G92.00, G92.01, G92.02, G92.03, G92.04, G92.05. Code first:
- complications of immune effector cellular therapy (T80.82)
- underlying cause such as:
Every code in G92
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| G92.0 Immune effector cell-associated neurotoxicity syndrome | ||||
| G92.00 | Immune effector cell-associated neurotoxicity syndrome, grade unspecifiedCMS: Immune effor cell-associated neurotoxicity synd, grade unsp | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| G92.01 | Immune effector cell-associated neurotoxicity syndrome, grade 1CMS: Immune effector cell-associated neurotoxicity synd, grade 1 | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| G92.02 | Immune effector cell-associated neurotoxicity syndrome, grade 2CMS: Immune effector cell-associated neurotoxicity synd, grade 2 | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| G92.03 | Immune effector cell-associated neurotoxicity syndrome, grade 3CMS: Immune effector cell-associated neurotoxicity synd, grade 3 | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| G92.04 | Immune effector cell-associated neurotoxicity syndrome, grade 4CMS: Immune effector cell-associated neurotoxicity synd, grade 4 | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| G92.05 | Immune effector cell-associated neurotoxicity syndrome, grade 5CMS: Immune effector cell-associated neurotoxicity synd, grade 5 | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| G92.8 | Other toxic encephalopathy | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| G92.9 | Unspecified toxic encephalopathy | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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