Is H49 a billable ICD-10-CM code?

No. H49 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does H49 sit in the tabular list?

Diseases of the eye and adnexa (H00-H59), in the block Disorders of ocular muscles, binocular movement, accommodation and refraction (H49-H52).

H49

H49 — Paralytic strabismus

Non-billable headerICD-10-CM

H49 is a non-billable header ICD-10-CM code for paralytic strabismus. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

internal ophthalmoplegia (H52.51-)
internuclear ophthalmoplegia (H51.2-)
progressive supranuclear ophthalmoplegia (G23.1)

Other codes that can never be billed with H49

These codes carry an Excludes1 note pointing at H49. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading H49 alone.

E88.4Mitochondrial metabolism disorders
G71.3Mitochondrial myopathy, not elsewhere classified
H49.4Progressive external ophthalmoplegia

Risk adjustment

H49 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 H49

7 child codes. Green means billable.

Questions about H49

Is H49 a billable ICD-10-CM code?: No. H49 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does H49 sit in the tabular list?: Diseases of the eye and adnexa (H00-H59), in the block Disorders of ocular muscles, binocular movement, accommodation and refraction (H49-H52).