Which encephalopathy code should you use?
The Alphabetic Index lists 44 codes under Encephalopathy. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| acute necrotizing hemorrhagic | G04.30 | Acute necrotizing hemorrhagic encephalopathy, unspecified |
| alcoholic | G31.2 | Degeneration of nervous system due to alcohol |
| arteriosclerotic | I67.2 | Cerebral atherosclerosis |
| centrolobar progressive | G37.0 | Diffuse sclerosis of central nervous system |
| congenital | Q07.9 | Congenital malformation of nervous system, unspecified |
| degenerative, in specified disease NEC | G32.89 | Other specified degenerative disorders of nervous system in diseases classified elsewhere |
| demyelinating callosal | G37.1 | Central demyelination of corpus callosum |
| developmental and epileptic | G93.45 | Developmental and epileptic encephalopathy |
| early infantile epileptic | G93.45 | Developmental and epileptic encephalopathy |
| FOXG1-related | QA0.0151 | FOXG1 syndrome |
| hepatic | K76.82 | Hepatic encephalopathy |
| hyperbilirubinemic, newborn | P57.9 | Kernicterus, unspecified |
| hypertensive | I67.4 | Hypertensive encephalopathy |
| hypoglycemic | E16.2 | Hypoglycemia, unspecified |
| hypoxic ischemic | P91.60 | Hypoxic ischemic encephalopathy [HIE], unspecified |
| metabolic | G93.41 | Metabolic encephalopathy |
| necrotizing, subacute | G31.82 | Leigh's disease |
| neonatal | P91.819 | Neonatal encephalopathy, unspecified |
| pellagrous | E52 | Niacin deficiency [pellagra] |
| portal-systemic | K76.82 | Hepatic encephalopathy |
| postcontusional | F07.81 | Postconcussional syndrome |
| posthypoglycemic | E16.1 | Other hypoglycemia |
| postradiation | G93.89 | Other specified disorders of brain |
| septic | G93.41 | Metabolic encephalopathy |
| specified NEC | G93.49 | Other encephalopathy |
| spongiform, subacute | A81.09 | Other Creutzfeldt-Jakob disease |
| toxic | G92.9 | Unspecified toxic encephalopathy |
| traumatic | F07.81 | Postconcussional syndrome |
| vitamin B deficiency NEC | E53.9 | Vitamin B deficiency, unspecified |
| Wernicke's | E51.2 | Wernicke's encephalopathy |
Encephalopathy acute necrotizing hemorrhagic
| postimmunization | G04.32 | Postimmunization acute necrotizing hemorrhagic encephalopathy |
| postinfectious | G04.31 | Postinfectious acute necrotizing hemorrhagic encephalopathy |
| specified NEC | G04.39 | Other acute necrotizing hemorrhagic encephalopathy |
Encephalopathy due to
| drugs | G92.8 | Other toxic encephalopathy |
Encephalopathy hyperbilirubinemic, newborn
| due to isoimmunization | P57.0 | Kernicterus due to isoimmunization |
Encephalopathy hypoxic ischemic
| mild | P91.61 | Mild hypoxic ischemic encephalopathy [HIE] |
| moderate | P91.62 | Moderate hypoxic ischemic encephalopathy [HIE] |
| severe | P91.63 | Severe hypoxic ischemic encephalopathy [HIE] |
Encephalopathy in
| birth injury | P11.1 | Other specified brain damage due to birth injury |
| hyperinsulinism | E16.1 | Other hypoglycemia |
| lack of vitamin | E56.9 | Vitamin deficiency, unspecified |
| neoplastic disease | D49.9 | Neoplasm of unspecified behavior of unspecified site |
| serum | T80.69Not billable | Other serum reaction due to other serum |
| syphilis | A52.17 | General paresis |
| trauma | F07.81 | Postconcussional syndrome |
| vaccination | G04.02 | Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis |
Encephalopathy metabolic
| drug induced | G92.8 | Other toxic encephalopathy |
| toxic | G92.8 | Other toxic encephalopathy |
Encephalopathy neonatal
| in diseases classified elsewhere | P91.811 | Neonatal encephalopathy in diseases classified elsewhere |
Encephalopathy toxic
| metabolic | G92.8 | Other toxic encephalopathy |
Encephalopathy vitamin B deficiency NEC
| vitamin B1 | E51.2 | Wernicke's encephalopathy |