ICD-10 Code E55.9 – Vitamin D deficiency, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E55.9 – Vitamin D deficiency, unspecified
What it is
E55.9 identifies vitamin D deficiency when the record does not specify the cause or a more precise type. Use it for documented low vitamin D status without further detail.
Clinical signs
Clinical features vary; refer to documentation. Commonly noted findings may include bone pain, muscle weakness, or nonspecific fatigue, but the code itself only requires documented vitamin D deficiency.
When to use this code
Use E55.9 when the clinician documents vitamin D deficiency but does not identify whether it is due to diet, malabsorption, or another cause. It also fits when the chart confirms deficiency but gives no further detail. If the record names a specific cause, code that condition instead.
Do not use for
Do not use this code for vitamin D insufficiency, normal vitamin D status, or suspected deficiency without confirmation. Check documentation if the note specifies a different disorder or a more precise deficiency type.
Coding tip
Code E55.9 only when the provider clearly documents vitamin D deficiency and no more specific etiology is available.