Is E55 a billable ICD-10-CM code?

No. E55 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does E55 sit in the tabular list?

Endocrine, nutritional and metabolic diseases (E00-E89), in the block Other nutritional deficiencies (E50-E64).

What cannot be coded together with E55?

E55 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

E55

E55 — Vitamin D deficiency

Non-billable headerICD-10-CM

E55 is a non-billable header ICD-10-CM code for vitamin d deficiency. 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.

adult osteomalacia (M83.-)
osteoporosis (M80.-)
sequelae of rickets (E64.3)

Other codes that can never be billed with E55

These codes carry an Excludes1 note pointing at E55. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading E55 alone.

M83Adult osteomalacia
E21Hyperparathyroidism and other disorders of parathyroid gland
E83Disorders of mineral metabolism
E83.31Familial hypophosphatemia

Risk adjustment

E55 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 E55

2 child codes. Green means billable.

Questions about E55

Is E55 a billable ICD-10-CM code?: No. E55 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does E55 sit in the tabular list?: Endocrine, nutritional and metabolic diseases (E00-E89), in the block Other nutritional deficiencies (E50-E64).
What cannot be coded together with E55?: E55 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.