DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

E46 diagnosis code · Billable category · FY2027

E46 Unspecified protein-calorie malnutrition

  • Billable
  • CC
  • POA reported

E46 ICD-10 code: a billable diagnosis code in FY2027; the category has no subdivisions.

Where it sits

  1. Chapter 4 Endocrine, nutritional and metabolic diseases (E00-E89)
  2. E40-E46 Malnutrition (E40-E46)
  3. E46 Unspecified protein-calorie malnutrition
CC / MCC
CC
MS-DRG
640-641, 791, 793
HCC V28
–
POA
Reported
Code Editor
–
Index entries
8

Instructions

At E46

Inclusion terms

  • Malnutrition NOS
  • Protein-calorie imbalance NOS

Excludes1

  • nutritional deficiency NOS (E63.9) E63.9

Notes that also apply

Block E40-E46 instructions (Excludes1 2, Excludes2 2): printed on the block page.

Chapter 4 instructions (Notes 1, Excludes1 1): printed on the chapter 4 page.

Index entries

  • Calorie deficiency or malnutrition → E46
  • Malnutrition → E46
  • Cataract (cortical) (immature) (incipient)malnutrition-dehydration → E46 [H28]
  • Deficiency, deficientprotein → E46
  • Malnutritionprotein → E46
  • Cataract (cortical) (immature) (incipient)in (due to)malnutrition-dehydration → E46 [H28]
  • Malnutritionproteincalorie → E46
  • Malnutritionproteinenergy → E46

NCHS Alphabetic Index. Index first, then the Tabular List.

Medicare grouping and edits

CMS files for E46
CC / MCCCC
PDX exclusion list0546 (9 codes)
Appendix BMDC 10 Endocrine, Nutritional and Metabolic Diseases and Disorders, MS-DRG 640-641 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCC…); MDC 15 Newborns and Other Neonates with Conditions Originating in Perinatal Period, MS-DRG 791 (Prematurity with Major Problems…); MDC 15 Newborns and Other Neonates with Conditions Originating in Perinatal Period, MS-DRG 793 (Full Term Neonate with Major Problems…)
Code Editor–
POAReported
HCC V28–

CC as a secondary diagnosis, not when the principal diagnosis is on its PDX exclusion list.

CMS: MS-DRG v44 (Appendix B, C), MCE v44, POA list FY2027, 2027 Initial ICD-10-CM Mappings. What the rows mean.

Hierarchy