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ICD-10-CM Code E73.9
Lactose intolerance, unspecified

Billable Code
Billable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.
| ICD-10 from 2011 - 2016

E73.9 is a billable ICD code used to specify a diagnosis of lactose intolerance, unspecified. A 'billable code' is detailed enough to be used to specify a medical diagnosis.

The ICD code E73 is used to code Inborn errors of carbohydrate metabolism

Inborn errors of carbohydrate metabolism are inborn error of metabolism that affect the catabolism and anabolism of carbohydrates.

Specialty: Endocrinology
MeSH Code: D002239
ICD 9 Code: 271
Source: Wikipedia

MS-DRG Mapping

  • DRG Group #391-392 - Esophagitis, gastroent and misc digest disorders with MCC.
  • DRG Group #391-392 - Esophagitis, gastroent and misc digest disorders without MCC.

ICD-10-CM Alphabetical Index References for 'E73.9 - Lactose intolerance, unspecified'

The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code E73.9. Click on any term below to browse the alphabetical index.


Intestinal disaccharidase deficiencies and disaccharide malabsorption (approximate match)

This is the official approximate match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that while there is no exact mapping between this ICD10 code E73.9 and a single ICD9 code, 271.3 is an approximate match for comparison and conversion purposes.

Parent Code: E73 - Lactose intolerance

** This Document Provided By ICD.Codes **
Source: http://icd.codes/icd10cm/E739