E73.9Billable

Lactose intolerance, unspecified

Chapter
4. Endocrine, nutritional and metabolic diseases
Category
E73
Effective date
October 1, 2026

Related codes in category E73

E73Lactose intoleranceE73.0Congenital lactase deficiencyYesE73.1Secondary lactase deficiencyYesE73.8Other lactose intoleranceYes

Frequently asked questions

What is ICD-10 code E73.9?

E73.9 is an ICD-10-CM diagnosis code for Lactose intolerance, unspecified.

Is E73.9 a billable code?

Yes. E73.9 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is E73.9 in?

E73.9 falls under Chapter 4: Endocrine, nutritional and metabolic diseases.

When did E73.9 become effective?

E73.9 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to E73.9?

E73.9 belongs to category E73, which includes 4 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.