Is D31 a billable ICD-10-CM code?

No. D31 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does D31 sit in the tabular list?

Neoplasms (C00-D49), in the block Benign neoplasms, except benign neuroendocrine tumors (D10-D36).

What cannot be coded together with D31?

D31 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

D31

D31 — Benign neoplasm of eye and adnexa

Non-billable headerICD-10-CM

D31 is a non-billable header ICD-10-CM code for benign neoplasm of eye and adnexa. 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.

benign neoplasm of connective tissue of eyelid (D21.0)
benign neoplasm of optic nerve (D33.3)
benign neoplasm of skin of eyelid (D22.1-, D23.1-)

Other codes that can never be billed with D31

These codes carry an Excludes1 note pointing at D31. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading D31 alone.

D33Benign neoplasm of brain and other parts of central nervous system
D36.1Benign neoplasm of peripheral nerves and autonomic nervous system
D21.0Benign neoplasm of connective and other soft tissue of head, face and neck

Risk adjustment

D31 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 D31

8 child codes. Green means billable.

Questions about D31

Is D31 a billable ICD-10-CM code?: No. D31 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does D31 sit in the tabular list?: Neoplasms (C00-D49), in the block Benign neoplasms, except benign neuroendocrine tumors (D10-D36).
What cannot be coded together with D31?: D31 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.