E64.9 ICD-10-CM Code: Sequelae of unspecified nutritional deficiency

E64.9 is the ICD-10-CM diagnosis code for sequelae of unspecified nutritional deficiency. This code describes long-term health problems that result from a past nutritional deficiency when the specific type of deficiency is not documented or known. It's used when a patient has lasting effects from malnutrition but the exact cause cannot be identified. E64.9 sits in the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89), within the section covering other nutritional deficiencies (e50-e64).

E64.9 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 nutritional deficiency (such as vitamin deficiency, protein deficiency, or mineral deficiency) cannot be determined; if the type is known, use the more specific sequelae code instead.