All ICD10 Codes

E73

Non-Billable
ChapterE00–E89
Rankcategory
Official Description

Lactose intolerance

Use a more specific code (4 billable)
E73.0Congenital lactase deficiencyE73.1Secondary lactase deficiencyE73.8Other lactose intoleranceE73.9Lactose intolerance, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 4: Endocrine, Nutritional and Metabolic Diseases (E00-E89).

CH4 Parent Instructions

Excludes1(Not coded here. Use a different code.)
  • transitory endocrine and metabolic disorders specific to newborn (P70-P74)

E70-E88 Parent Instructions

Excludes1(Not coded here. Use a different code.)
  • androgen insensitivity syndrome (E34.5-)
  • congenital adrenal hyperplasia (E25.0)
  • hemolytic anemias attributable to enzyme disorders (D55.-)
  • Marfan syndrome (Q87.4-)
  • 5-alpha-reductase deficiency (E29.1)
Excludes2(Not included here. Code separately if applicable.)
  • Ehlers-Danlos syndromes (Q79.6-)

Clinical Hierarchy

BillableHas subcodes
CH4Endocrine, nutritional and metabolic diseases (E00-E89)
E70-E88Metabolic disorders (E70-E88)
E73Lactose intoleranceNot billable
E73.0Congenital lactase deficiencyBillable
E73.1Secondary lactase deficiencyBillable
E73.8Other lactose intoleranceBillable
E73.9Lactose intolerance, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to E73:

blockE70-E88
Metabolic disorders (E70-E88)
View context instructions
chapterCH4
Endocrine, nutritional and metabolic diseases (E00-E89)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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