2027 ICD-10-CM Diagnosis Code K82.1Hydrops of gallbladder
ICD-10-CM Codes›K00–K95›K80-K87›K82
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
K82.1 is a billable ICD-10-CM diagnosis code for hydrops of gallbladder. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 444 through 446. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 10 closely related codes. Coders also document this condition as acute hydrops of gallbladder. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Biliary tract disease.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute hydrops of gallbladder
- Cyst of biliary tract
- Cyst of gallbladder
- Hydrops of gallbladder
- Mucocele of gallbladder
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to K82.1: its own notes plus those printed at K82 and Chapter 11. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Mucocele of gallbladder
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name K82.1, its category, or a range that includes it.
Excludes2 2
These codes carry an Excludes2 note naming K82.1: its condition is not part of those codes, and both may be reported when the patient has both.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Disease, diseased See Also: Syndrome;
hydrops K82.1
gallbladder K82.1
gallbladder K82.1
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Gallbladder Diseases
Your gallbladder is a pear-shaped organ under your liver. It stores bile, a fluid made by your liver to digest fat. As your stomach and intestines digest food, your gallbladder releases bile through a tube called the common bile duct. The duct connects your gallbladder and liver to your small intestine.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert K82.1 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About K82.1Overview
What is the ICD-10 code for hydrops of gallbladder?
The ICD-10-CM code for hydrops of gallbladder is K82.1 (sometimes written as K821). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is K82.1 (Other diseases of gallbladder) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report hydrops of gallbladder on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does K82.1 group to?
When hydrops of gallbladder is the principal diagnosis on an inpatient stay, it groups to MS-DRG 444, 445, 446, with relative weights from 0.8121 to 1.6662 depending on complications. Higher weights mean higher Medicare reimbursement.
Is K82.1 a CC or MCC?
CMS lists K82.1 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 10 closely related codes in its exclusion list.
Can K82.1 be reported with R93.2?
Not as a rule. The Excludes1 note at K82, which applies to K82.1, lists "nonvisualization of gallbladder (R93.2)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
