2026 ICD-10-CM Diagnosis Code K11.4Fistula of salivary gland
ICD-10-CM Codes›K00–K95›K00-K14›K11
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
K11.4 is a billable ICD-10-CM diagnosis code for fistula of salivary gland. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 11 through 13, 154 through 156. 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 19 closely related codes. Coders also document this condition as fistula of parotid gland. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Any dental condition including traumatic injury, Diseases of mouth; excluding dental, and Nontraumatic dental conditions.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Fistula of parotid gland
- Fistula of salivary gland
- Fistula of sublingual gland
- Fistula of submandibular gland
- Oral fistula
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 1 Excludes
- congenital fistula of salivary gland Q38.4
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
parotid (gland) K11.4
sublingual gland K11.4
submandibular gland K11.4
submaxillary (gland) K11.4
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Oral Fistula
an abnormal passage within the mouth communicating between two or more anatomical structures.
Patient EducationClinical
Fistulas
A fistula is an abnormal connection between two parts inside of the body. Fistulas may develop between different organs, such as between the esophagus and the windpipe or the bowel and the vagina. They can also develop between two blood vessels, such as between an artery and a vein or between two arteries.
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Convert K11.4 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About K11.4Overview
What is the ICD-10 code for fistula of salivary gland?
The ICD-10-CM code for fistula of salivary gland is K11.4 (sometimes written as K114). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is K11.4 (Diseases of salivary glands) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report fistula of salivary gland on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does K11.4 group to?
When fistula of salivary gland is the principal diagnosis on an inpatient stay, it groups to MS-DRG 11, 12, 13, 154, 155, 156, with relative weights from 0.6911 to 5.4541 depending on complications. Higher weights mean higher Medicare reimbursement.
Is K11.4 a CC or MCC?
CMS lists K11.4 as a CC (complication or comorbidity) for FY 2026. 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 19 closely related codes in its exclusion list.
What is the ICD-9 equivalent of K11.4?
Under the General Equivalence Mappings, fistula of salivary gland converts to ICD-9-CM 527.4 (salivary gland fistula). The mapping is a direct match.
