Is H27 a billable ICD-10-CM code?

No. H27 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does H27 sit in the tabular list?

Diseases of the eye and adnexa (H00-H59), in the block Disorders of lens (H25-H28).

What cannot be coded together with H27?

H27 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

H27

H27 — Other disorders of lens

Non-billable headerICD-10-CM

H27 is a non-billable header ICD-10-CM code for other disorders of lens. 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.

congenital lens malformations (Q12.-)
mechanical complications of intraocular lens implant (T85.2)
pseudophakia (Z96.1)

Other codes that can never be billed with H27

These codes carry an Excludes1 note pointing at H27. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading H27 alone.

Z98.4Cataract extraction status

Risk adjustment

H27 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 H27

4 child codes. Green means billable.

Questions about H27

Is H27 a billable ICD-10-CM code?: No. H27 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does H27 sit in the tabular list?: Diseases of the eye and adnexa (H00-H59), in the block Disorders of lens (H25-H28).
What cannot be coded together with H27?: H27 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.