E55.9: Vitamin D deficiency, unspecified

Billable ICD-10-CM code, FY2027

What ICD-10-CM says

Includes

  • Avitaminosis D

Notes at E55, Vitamin D deficiency (they apply to every code under it)

Excludes1 (never coded with E55.9)

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

What E55.9 covers

E55.9 is for vitamin D deficiency when no more specific form is documented. It includes avitaminosis D. It is common in primary care, endocrinology and geriatrics.

Its only sibling is E55.0, active rickets. Sequelae of rickets are E64.3, and adult osteomalacia is coded in M83.-.

Billing and coding notes

The E55 category has an excludes1 for adult osteomalacia (M83.-), osteoporosis (M80.-) and sequelae of rickets (E64.3). If the provider documents one of those conditions as the result of the deficiency, code that condition rather than E55.9.

A low vitamin D result on its own is not a diagnosis. E55.9 needs the provider to document vitamin D deficiency.

Related codes under E55

Questions about E55.9

Is E55.9 billable?

Yes. E55.9 is a complete code.

Can E55.9 be coded with osteomalacia?

No. Adult osteomalacia (M83.-) is an excludes1 at E55, so the osteomalacia code is used instead.

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ICD-10-CM in CloudMedico

In CloudMedico, a visit's diagnoses come from the current ICD-10-CM list. For US practices, the visit flags a code that isn't billable on its date, and a superbill made from an invoice carries the visit's diagnoses.

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ICD-10-CM FY2027, code descriptions file, CDC National Center for Health Statistics, effective October 1, 2026. ICD-10-CM is in the public domain.

Official text: ICD-10-CM FY2027 tabular list, CDC National Center for Health Statistics, effective October 1, 2026. The summary, notes and answers on this page are CloudMedico's.