What E46 covers · when clinicians use it
ICD-10 code E46 identifies Unspecified protein-calorie malnutrition in the U.S. ICD-10-CM clinical and billing record set. It sits within the Endocrine, Nutritional & Metabolic chapter (E00–E89), the section that groups related diagnoses so providers, payers, and public-health agencies report them consistently. Clinicians and medical coders apply E46 when an encounter's findings match the Unspecified protein-calorie malnutrition description, attaching it to the patient record so downstream insurance claims, payer audits, quality reporting, and epidemiological surveillance all reference the same standardized diagnosis. The ICD-10-CM is maintained by the Centers for Medicare & Medicaid Services and the CDC's National Center for Health Statistics, with an updated official code set released each U.S. fiscal year — always verify E46 against the current CMS/CDC release and your payer's documentation guidance before final use. This page summarizes documentation context for E46 and is a coding reference, not clinical, diagnostic, or billing advice.
E46 refers to Unspecified protein-calorie malnutrition, part of a group of diagnoses that involve intraoperative endocrine complications and various forms of severe to mild protein-calorie malnutrition. These conditions are significant in surgical, pediatric, and global health settings due to their impact on growth, healing, and overall outcomes.
Symptoms
- Growth failure or stunted height – From long-term nutritional deficiency
- Muscle wasting – Typical in marasmus or severe malnutrition
- Edema – Particularly in kwashiorkor and marasmic kwashiorkor
- Developmental delay – Seen in E45 due to early malnutrition
- Infection susceptibility – Weak immunity in malnourished patients
- Surgical instability – Linked with E36 endocrine intraoperative complications
- Fatigue or listlessness – Due to lack of essential nutrients
Diagnosis
Diagnosis of Unspecified protein-calorie malnutrition includes anthropometric measurements (weight-for-height, BMI, mid-upper arm circumference), blood tests for albumin and electrolytes, surgical notes (for E36), and developmental assessments (for E45). Nutrition and surgical teams collaborate on assessment and care planning.
ICD10 Code Usage
ICD10 code E46 is commonly used in global health, pediatric, nutrition, and surgical coding to document both malnutrition severity and intraoperative endocrine complications. It aids in public health surveillance, insurance billing, and clinical documentation.
Related Codes
- E36 – Intraoperative complications of endocrine system
- E40 – Kwashiorkor
- E41 – Nutritional marasmus
- E42 – Marasmic kwashiorkor
- E43 – Unspecified severe protein-calorie malnutrition
- E44 – Protein-calorie malnutrition of moderate and mild degree
- E45 – Retarded development following protein-calorie malnutrition
FAQs
Q1: What is ICD10 code E46?
A: It identifies Unspecified protein-calorie malnutrition, covering either endocrine system complications during surgery or degrees of protein-calorie malnutrition.
Q2: What causes these conditions?
A: Causes include inadequate nutrition, post-op complications, prolonged illness, and systemic poverty or food insecurity.
Q3: Are these conditions reversible?
A: Most nutritional disorders are treatable with rehabilitation. Intraoperative issues require acute management and follow-up.
Q4: How are they managed?
A: Nutritional supplementation, therapeutic feeding protocols, endocrine monitoring, or surgical intervention as appropriate.
Q5: Who manages these conditions?
A: Multidisciplinary teams including surgeons, endocrinologists, pediatricians, and clinical nutritionists.
Conclusion
ICD10 code E46 helps document and manage Unspecified protein-calorie malnutrition, ensuring appropriate treatment planning and global tracking of nutritional or surgical-endocrine issues. Accurate coding supports better patient outcomes and resource allocation for at-risk populations.