G40.82 ICD-10-CM Code: Epileptic spasms
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for G40.82 in the official ICD-10-CM tabular list.
Inclusion Terms
Alternative terms the tabular list files under this code.
- Infantile spasms
- Salaam attacks
- West's syndrome
Excludes1 — Not Coded Here
Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
- conversion disorder with seizures (F44.5) Compare G40.82 vs F44.5 →
- convulsions NOS (R56.9) Compare G40.82 vs R56.9 →
- post traumatic seizures (R56.1) Compare G40.82 vs R56.1 →
- seizure (convulsive) NOS (R56.9) Compare G40.82 vs R56.9 →
- seizure of newborn (P90) Compare G40.82 vs P90 →
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- hippocampal sclerosis (G93.81) Compare G40.82 vs G93.81 →
- mesial temporal sclerosis (G93.81) Compare G40.82 vs G93.81 →
- temporal sclerosis (G93.81) Compare G40.82 vs G93.81 →
- Todd's paralysis (G83.84) Compare G40.82 vs G83.84 →
Frequently Compared Codes
The official Excludes notes on G40.82 name these codes. Each comparison page covers when the two can — or must not — be reported together.
Change history
No changes recorded for this code — unchanged since the FY2016 baseline of the change ledger.
Verify Before Coding
From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.
Relationships & Classification
Other codes that name G40.82 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.
3 Excludes1 notes across 2 chapters: G25.3 (via G40.-), R56 (via G40.-), R56.1 (via G40.-).
2 Excludes2 notes: F44.0 (via G40.-), F44.1 (via G40.-).
1 Code First instructions: F02 (via G40.-).
2 Use Additional Code instructions: Q87.87 (via G40.-), Q93.52 (via G40.-).
9 Code Also instructions across 7 chapters: E20.810 (via G40.-), F78.A1 (via G40.-), G04.8 (via G40.-), G43.1 (via G40.-), G93.45 (via G40.-), I67.850 (via G40.-), Q87.85 (via G40.-), QA0 (via G40.-), Z15.1 (via G40.-).
Contextual Map
Every relationship of G40.82 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.
Hierarchy
- G00-G99 — Chapter 6: Diseases of the Nervous System (G00-G99) (G00-G99) [Hierarchy]
Referenced by Excludes1 notes
- G25.3 — Myoclonus [Excludes1](via G40.-): “myoclonic epilepsy (G40.-)” · check together
- R56 — Convulsions, not elsewhere classified [Excludes1](via G40.-): “epileptic convulsions and seizures (G40.-)” · check together
- R56.1 — Post traumatic seizures [Excludes1](via G40.-): “post traumatic epilepsy (G40.-)” · check together
Referenced by Excludes2 notes
- F44.0 — Dissociative amnesia [Excludes2](via G40.-): “postictal amnesia in epilepsy (G40.-)” · check together
- F44.1 — Dissociative fugue [Excludes2](via G40.-): “postictal fugue in epilepsy (G40.-)” · check together
Referenced by Code First instructions
- F02 — Dementia in other diseases classified elsewhere [Code First](via G40.-): “epilepsy and recurrent seizures (G40.-)” · check together
Referenced by Use Additional Code instructions
- Q87.87 — Hao-Fountain Syndrome [Use Additional Code](via G40.-): “epilepsy, by specific type (G40.-)” · check together
- Q93.52 — Phelan-McDermid syndrome [Use Additional Code](via G40.-): “epilepsy and recurrent seizures (G40.-)” · check together
Referenced by Code Also instructions (9)
- E20.810 — Autosomal dominant hypocalcemia [Code Also](via G40.-): “seizure disorder (G40.-, R56.9)” · check together
- F78.A1 — SYNGAP1-related intellectual disability [Code Also](via G40.-): “epilepsy and recurrent seizures (G40.-)” · check together
- G04.8 — Other encephalitis, myelitis and encephalomyelitis [Code Also](via G40.-): “any associated seizure (G40.-, R56.9)” · check together
- G43.1 — Migraine with aura [Code Also](via G40.-): “any associated seizure (G40.-, R56.9)” · check together
- G93.45 — Developmental and epileptic encephalopathy [Code Also](via G40.-): “epilepsy, by specific type (G40.-)” · check together
- I67.850 — Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy [Code Also](via G40.-): “epilepsy (G40.-)” · check together
- Q87.85 — MED13L syndrome [Code Also](via G40.-): “epilepsy and recurrent seizures (G40.-)” · check together
- QA0 — Neurodevelopmental disorders related to specific genetic pathogenic variants [Code Also](via G40.-): “epilepsy, by specific type (G40.-)” · check together
- and 1 more
Nearest codes (40)
- G40 — Epilepsy and recurrent seizures [Sibling]
- G40.409 — Other generalized epilepsy and epileptic syndromes, not intractable, without status epilepticus [Sibling]
- G40.41 — Other generalized epilepsy and epileptic syndromes, intractable [Sibling]
- G40.411 — Other generalized epilepsy and epileptic syndromes, intractable, with status epilepticus [Sibling]
- G40.419 — Other generalized epilepsy and epileptic syndromes, intractable, without status epilepticus [Sibling]
- G40.42 — Cyclin-Dependent Kinase-Like 5 Deficiency Disorder [Sibling]
- G40.5 — Epileptic seizures related to external causes [Sibling]
- G40.50 — Epileptic seizures related to external causes, not intractable [Sibling]
- and 32 more
Frequently Asked Questions (FAQ) & Clinical Guidance
Can G40.82 be billed directly?
No. G40.82 (Epileptic spasms) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to G40.82 in its code family, with their registry titles.
- G40.81 — Lennox-Gastaut syndrome
- G40.811 — Lennox-Gastaut syndrome, not intractable, with status epilepticus
- G40.812 — Lennox-Gastaut syndrome, not intractable, without status epilepticus
- G40.813 — Lennox-Gastaut syndrome, intractable, with status epilepticus
- G40.814 — Lennox-Gastaut syndrome, intractable, without status epilepticus
- G40.821 — Epileptic spasms, not intractable, with status epilepticus
- G40.822 — Epileptic spasms, not intractable, without status epilepticus
- G40.823 — Epileptic spasms, intractable, with status epilepticus
- G40.824 — Epileptic spasms, intractable, without status epilepticus
- G40.83 — Dravet syndrome