2027 ICD-10-CM Diagnosis Code K82.A1Gangrene of gallbladder in cholecystitis
ICD-10-CM Codes›K00–K95›K80-K87›K82
- Billable — Valid for Submission
- Not Chronic
K82.A1 is a billable ICD-10-CM diagnosis code for gangrene of gallbladder in cholecystitis. 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. The code is a manifestation code that cannot be reported as the principal diagnosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Biliary tract disease and Gangrene.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for K82.A1.
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to K82.A1: its own notes plus those printed at K82.A, K82, and Chapter 11. A note printed at a category, block or chapter applies to every code under it.
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)
Code First
The underlying condition named in the note is sequenced before this code.
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.A1, its category, or a range that includes it.
Excludes2 2
These codes carry an Excludes2 note naming K82.A1: its condition is not part of those codes, and both may be reported when the patient has both.
Use Additional Code 5
These codes say to use an additional code from the note, and K82.A1 is one of the codes named.
- K80.0 Calculus of gallbladder with acute cholecystitiscode if applicable for associated gangrene of gallbladder (K82.A1), or perforation of gallbladder (K82.A2)
- K80.1 Calculus of gallbladder with other cholecystitiscode if applicable for associated gangrene of gallbladder (K82.A1), or perforation of gallbladder (K82.A2)
- K80.4 Calculus of bile duct with cholecystitiscode if applicable for associated gangrene of gallbladder (K82.A1), or perforation of gallbladder (K82.A2)
- K80.6 Calculus of gallbladder and bile duct with cholecystitiscode if applicable for associated gangrene of gallbladder (K82.A1), or perforation of gallbladder (K82.A2)
- K81 Cholecystitiscode if applicable for associated gangrene of gallbladder (K82.A1), or perforation of gallbladder (K82.A2)
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
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.
Code History & ChangesHistory
Replacement K82.A1 replaces the following previously assigned code(s):
- K81.0 - Acute cholecystitis
Questions About K82.A1Overview
What is the ICD-10 code for gangrene of gallbladder in cholecystitis?
The ICD-10-CM code for gangrene of gallbladder in cholecystitis is K82.A1 (sometimes written as K82A1). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is K82.A1 (Disorders of gallbladder in diseases classified elsewhere) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report gangrene of gallbladder in cholecystitis on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does K82.A1 group to?
On inpatient claims, gangrene of gallbladder in cholecystitis maps to MS-DRG 444, 445, 446, with relative weights from 0.8121 to 1.6662 depending on complications. Higher weights mean higher Medicare reimbursement.
Can K82.A1 be a principal diagnosis?
No. This is a manifestation code: gangrene of gallbladder in cholecystitis describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.
Can K82.A1 be reported with R93.2?
Not as a rule. The Excludes1 note at K82, which applies to K82.A1, 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).
