K90.49 Malabsorption due to intolerance, not elsewhere classified

The ICD-10-CM code for Malabsorption due to intolerance, not elsewhere classified is K90.49 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

11: Diseases of the digestive system (K00-K95)

Section

K90-K95: Other diseases of the digestive system (K90-K95)

Category K90

17 codes (13 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to K90.49:

• Enteropathy › protein-losing
• Absorption › starch, disturbance
• Absorption › fat, disturbance
• Absorption › carbohydrate, disturbance
• Intolerance › fat NEC
• Intolerance › food
• Absorption › protein, disturbance
• Intolerance › carbohydrate

Inclusion Terms

• Malabsorption due to intolerance to carbohydrate
• Malabsorption due to intolerance to fat
• Malabsorption due to intolerance to protein
• Malabsorption due to intolerance to starch

U.S. Hospital Utilization

• An estimated 5,855 U.S. inpatient stays in 2023 included K90.49 among the documented diagnoses.
• 720 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Chapter 11 reserved for future expansion

11. Chapter 11: Diseases of the Digestive System (K00-K95) Reserved for future guideline expansion

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)