ICDcodes.org
FY2027

G40 — Epilepsy and recurrent seizures

Not billable

Is G40 billable?

No — G40 is a non-billable header code. G40 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 58 billable codes beneath G40.

Billable codes under this header

G40 at a glance

CodeG40
DescriptionEpilepsy and recurrent seizures
BillableNo — header code
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027

Excludes1 — never code together

The conditions below can never be reported together with G40 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

  • conversion disorder with seizures (F44.5)
  • convulsions NOS (R56.9)
  • post traumatic seizures (R56.1)
  • seizure (convulsive) NOS (R56.9)
  • seizure of newborn (P90)

Excludes2 — not included here

The conditions below are not part of G40, but a patient may have both at the same time. When documentation supports it, G40 and the excluded code may both be reported.

Note

  • the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled

Excludes2 — not included here — inherited from Chapter 6

The conditions below are not part of G40, but a patient may have both at the same time. When documentation supports it, G40 and the excluded code may both be reported.

  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

What codes fall under G40? (11)

How long has G40 existed?

G40 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

Which codes are confused with G40?

ICD-10-CM declares these codes mutually exclusive with G40 — exactly one of each pair can be correct for a given encounter.