Is H33 a billable ICD-10-CM code?

No. H33 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does H33 sit in the tabular list?

Diseases of the eye and adnexa (H00-H59), in the block Disorders of choroid and retina (H30-H36).

What cannot be coded together with H33?

H33 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

H33

H33 — Retinal detachments and breaks

Non-billable headerICD-10-CM

H33 is a non-billable header ICD-10-CM code for retinal detachments and breaks. 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.

detachment of retinal pigment epithelium (H35.72-, H35.73-)

Other codes that can never be billed with H33

These codes carry an Excludes1 note pointing at H33. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading H33 alone.

H33.0Retinal detachment with retinal break
H35.2Other non-diabetic proliferative retinopathy
H35.7Separation of retinal layers
H43.8Other disorders of vitreous body

Risk adjustment

H33 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 H33

6 child codes. Green means billable.

Questions about H33

Is H33 a billable ICD-10-CM code?: No. H33 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does H33 sit in the tabular list?: Diseases of the eye and adnexa (H00-H59), in the block Disorders of choroid and retina (H30-H36).
What cannot be coded together with H33?: H33 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.