K82.1 Hydrops of gallbladder

The ICD-10-CM code for Hydrops of gallbladder is K82.1 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

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

Section

K80-K87: Disorders of gallbladder, biliary tract and pancreas (K80-K87)

Category K82

11 codes (9 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to K82.1:

• Mucocele › gallbladder
• Hydrops › gallbladder
• Disease, diseased › gallbladder › hydrops

Inclusion Terms

• Mucocele of gallbladder

U.S. Hospital Utilization

• An estimated 20,745 U.S. inpatient stays in 2023 included K82.1 among the documented diagnoses.
• 245 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)