2026 ICD-10-CM Diagnosis Code K05.6Periodontal disease, unspecified
ICD-10-CM Codes›K00–K95›K00-K14›K05
- Billable — Valid for Submission
- Not Chronic
K05.6 is a billable ICD-10-CM diagnosis code for periodontal disease, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 157 through 159. Coders also document this condition as dental peri-implantitis. 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.
- Dental peri-implantitis
- Dental peri-implantitis due to dental biofilm
- Fetal disorder due to maternal periodontal disease
- Maxillary sinusitis due to dental disorder
- Maxillary sinusitis due to periodontal disease
- Periodontal disease
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Disease, diseased - See Also: Syndrome;
- parodontal - K05.6
- periodontal - K05.6
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Disease, diseased
- parodontal
- Disease, diseased
- periodontal
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 K05.6 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About K05.6Overview
Is K05.6 (Gingivitis and periodontal diseases) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report periodontal disease, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does K05.6 group to?
When periodontal disease, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 157, 158, 159, with relative weights from 0.7085 to 1.7168 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of K05.6?
Under the General Equivalence Mappings, periodontal disease, unspecified converts to ICD-9-CM 523.9 (gingiv/periodont dis NOS). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
