Is R56 a billable ICD-10-CM code?

No. R56 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does R56 sit in the tabular list?

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block General symptoms and signs (R50-R69).

What cannot be coded together with R56?

R56 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

R56

R56 — Convulsions, not elsewhere classified

Non-billable headerICD-10-CM

R56 is a non-billable header ICD-10-CM code for convulsions, not elsewhere classified. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

dissociative convulsions and seizures (F44.5)
epileptic convulsions and seizures (G40.-)
newborn convulsions and seizures (P90)

Other codes that can never be billed with R56

These codes carry an Excludes1 note pointing at R56. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading R56 alone.

R50Fever of other and unknown origin
G40.89Other seizures
G40Epilepsy and recurrent seizures

Risk adjustment

R56 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead R56

3 child codes. Green means billable.

Questions about R56

Is R56 a billable ICD-10-CM code?: No. R56 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does R56 sit in the tabular list?: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block General symptoms and signs (R50-R69).
What cannot be coded together with R56?: R56 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.