Is H21.1 a billable ICD-10-CM code?

No. H21.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does H21.1 sit in the tabular list?

Diseases of the eye and adnexa (H00-H59), in the block Disorders of sclera, cornea, iris and ciliary body (H15-H22).

H21.1

H21.1 — Other vascular disorders of iris and ciliary body

Non-billable headerICD-10-CM

H21.1 is a non-billable header ICD-10-CM code for other vascular disorders of iris and ciliary body. It cannot be billed on its own: choose one of the more specific child codes below.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Neovascularization of iris or ciliary body
Rubeosis iridis
Rubeosis of iris

Risk adjustment

H21.1 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 H21.1

1 child code. Green means billable.

H21.1XOther vascular disorders of iris and ciliary body

Related codes at this level

Codes that share H21. If H21.1 is not quite right, the correct code is usually one of these.

Questions about H21.1

Is H21.1 a billable ICD-10-CM code?: No. H21.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does H21.1 sit in the tabular list?: Diseases of the eye and adnexa (H00-H59), in the block Disorders of sclera, cornea, iris and ciliary body (H15-H22).