E63.9

Nutritional deficiency, unspecified

FY2027Chapter 4: Endocrine, nutritional and metabolic diseases/E50–E64 Other nutritional deficiencies

BillableComplete code, valid to report

E63.9 (also written E639) is a billable ICD-10-CM diagnosis code for nutritional deficiency, unspecified. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 4 codes in category E63 (Other nutritional deficiencies). The Alphabetic Index lists it under 15 entries. Its coding notes include 1 Excludes1 entry and 6 Excludes2 entries.

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Also from chapter/block level (1 note)
Inherited from Chapter 4 Endocrine, nutritional and metabolic diseases
  • transitory endocrine and metabolic disorders specific to newborn (P70-P74)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Inherited from E63 Other nutritional deficiencies
  • dehydration (E86.0)
  • failure to thrive, adult (R62.7)
  • failure to thrive, child (R62.51)
  • feeding problems in newborn (P92.-)
  • sequelae of malnutrition and other nutritional deficiencies (E64.-)
Also from chapter/block level (1 note)
Inherited from E50–E64 Other nutritional deficiencies

Notes

Also from chapter/block level (1 note)
Inherited from Chapter 4 Endocrine, nutritional and metabolic diseases
  • All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 15 entries

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