2026 ICD-10-CM Diagnosis Code K05.00Acute gingivitis, plaque induced
ICD-10-CM Codes›K00–K95›K00-K14›K05
- Billable — Valid for Submission
- Not Chronic
K05.00 is a billable ICD-10-CM diagnosis code for acute gingivitis, plaque induced. 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, 157 through 159. Coders also document this condition as acute gingivitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Any dental condition including traumatic injury; Caries, periodontitis, and other preventable dental conditions; and Disorders of teeth and gingiva.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute gingivitis
- Acute ulcerative gingivitis
- Catarrhal gingivitis
- Ulceration of gingivae
- Ulcerative gingivitis
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Acute gingivitis NOS
- Plaque induced gingival disease
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Catarrh, catarrhal (acute) (febrile) (infectious) (inflammation) See Also: condition; J00
gingivitis K05.00
plaque induced K05.00
Disease, diseased See Also: Syndrome;
plaque induced K05.00
Jourdain's (acute gingivitis) K05.00
plaque induced K05.00
acute (catarrhal) K05.00
plaque induced K05.00
Infection, infected, infective (opportunistic) B99.9
acute K05.00
plaque induced K05.00
acute K05.00
plaque induced K05.00
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Gum Disease
If you have gum disease, you're not alone. Many U.S. adults currently have some form of the disease. It ranges from simple gum inflammation, called gingivitis, to serious damage to the tissue and bone supporting the teeth. In the worst cases, you can lose teeth.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert K05.00 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About K05.00Overview
What is the ICD-10 code for acute gingivitis, plaque induced?
The ICD-10-CM code for acute gingivitis, plaque induced is K05.00 (sometimes written as K0500). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is K05.00 (Acute gingivitis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report acute gingivitis, plaque induced on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does K05.00 group to?
When acute gingivitis, plaque induced is the principal diagnosis on an inpatient stay, it groups to MS-DRG 11, 12, 13, 157, 158, 159, with relative weights from 0.7085 to 5.4541 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of K05.00?
Under the General Equivalence Mappings, acute gingivitis, plaque induced converts to ICD-9-CM 523.00 (acute gingititis, plaque). The mapping is a direct match.
