Is G70 a billable ICD-10-CM code?

No. G70 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does G70 sit in the tabular list?

Diseases of the nervous system (G00-G99), in the block Diseases of myoneural junction and muscle (G70-G73).

What cannot be coded together with G70?

G70 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

G70

G70 — Myasthenia gravis and other myoneural disorders

Non-billable headerICD-10-CM

G70 is a non-billable header ICD-10-CM code for myasthenia gravis and other myoneural disorders. 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.

botulism (A05.1, A48.51-A48.52)
transient neonatal myasthenia gravis (P94.0)

Other codes that can never be billed with G70

These codes carry an Excludes1 note pointing at G70. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading G70 alone.

P94.0Transient neonatal myasthenia gravis
E32Diseases of thymus
G73.1Lambert-Eaton syndrome in neoplastic disease

Risk adjustment

G70 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 G70

5 child codes. Green means billable.

Questions about G70

Is G70 a billable ICD-10-CM code?: No. G70 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does G70 sit in the tabular list?: Diseases of the nervous system (G00-G99), in the block Diseases of myoneural junction and muscle (G70-G73).
What cannot be coded together with G70?: G70 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.