G83.84
BillableTodd's paralysis (postepileptic)
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is G83.84 an HCC code?
Yes. G83.84 maps to Monoplegia, Other Paralytic Syndromes under the CMS-HCC V28 risk adjustment model (and Monoplegia, Other Paralytic Syndromes under V24).
HCC Category Mapping
RAF weights shown are the community, non-dual, aged base weights from the CMS risk adjustment model file. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.
MEAT Criteria for G83.84
For G83.84 to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically — it has to be re-documented and supported each calendar year.
- MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
- EEvaluate: test results, medication response, or physical findings reviewed by the provider
- AAssess: explicit mention in the assessment or plan with acknowledgment of status
- TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis
Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed G83.84 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
G83.84 is the ICD-10-CM diagnosis code for todd's paralysis (postepileptic). Temporary paralysis or weakness that occurs after a seizure episode, gradually resolving as the brain recovers from the seizure activity. G83.84 sits in the ICD-10-CM chapter for diseases of the nervous system (g00-g99), within the section covering cerebral palsy and other paralytic syndromes (g80-g83).
Under the CMS-HCC V28 risk adjustment model, G83.84 maps to Monoplegia, Other Paralytic Syndromes (HCC 254) with a community, non-dual, aged base RAF weight of 0.000. Under the older V24 model, G83.84 mapped to the same category but with a base RAF weight of 0.304 — V28 recalibrated weights across the entire model. V28 is the CMS-HCC risk adjustment model that reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition.
Ensure the seizure episode is documented and coded separately (typically with G40 codes). Because G83.84 maps to a payment HCC, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's Medicare Advantage risk adjustment score. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for G83.84 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Ensure the seizure episode is documented and coded separately (typically with G40 codes)
- •Document the duration and resolution of the paralysis to distinguish from permanent neurological deficits
Clinical Significance
Todd paralysis is a transient neurological deficit, most commonly hemiparesis, that occurs after a seizure and typically resolves within 48 hours. Its significance lies in distinguishing it from acute stroke, which presents similarly but requires very different emergency management. In the risk adjustment context, this code identifies patients with active seizure disorders and their associated neurological complications, driving resource needs for ongoing epilepsy management.
Documentation Requirements
- ✓Documentation of temporary paralysis or weakness following a seizure episode
- ✓Temporal relationship to the seizure clearly documented
- ✓Duration and resolution of the paralysis
- ✓Underlying seizure disorder documented and coded separately (G40 codes)
- ✓Distinction from stroke or other permanent neurological deficit documented
- ✓Emergency evaluation workup to rule out stroke if applicable
- ✓Active seizure management plan