ICD-10 Code F55.4 – Abuse of vitamins (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F55.4 – Abuse of vitamins
What it is
F55.4 identifies harmful or excessive use of vitamins that is not due to a poisoning event. Use it when the record documents misuse, overuse, or dependence-like behavior involving vitamin products.
Clinical signs
Clinical features vary; refer to documentation. Common clues include reported overuse, self-administration beyond recommended amounts, or continued use despite adverse effects or provider advice.
When to use this code
Use this code when the clinician documents vitamin abuse as the diagnosis, especially in behavioral or chronic misuse contexts. It may apply when the patient takes vitamins excessively without a poisoning diagnosis. Confirm that the record supports abuse rather than accidental overdose or routine supplementation.
Do not use for
Do not use F55.4 for acute poisoning, toxic effect, or adverse drug reaction from vitamins. Check documentation if the issue is ordinary vitamin use, deficiency treatment, or an unspecified supplement concern.
Coding tip
Code only when the chart clearly states abuse or misuse of vitamins; otherwise, verify whether a poisoning or other diagnosis is more appropriate.