E53.9 ICD-10-CM Code: Vitamin B deficiency, unspecified

E53.9 is the ICD-10-CM diagnosis code for vitamin b deficiency, unspecified. A condition where a patient lacks sufficient B vitamins in their body, but the specific type of B vitamin deficiency has not been identified or documented. This can cause fatigue, weakness, and nerve problems if left untreated. E53.9 sits in the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89), within the section covering other nutritional deficiencies (e50-e64).

E53.9 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.

Use this code only when the specific B vitamin deficiency (B1, B2, B3, B6, B12, folate, etc.) cannot be determined from the medical record; always attempt to identify the specific deficiency first.