2026 ICD-10-CM Diagnosis Code M26.36Insufficient interocclusal distance of fully erupted teeth (ridge)
ICD-10-CM Codes›M00–M99›M26-M27›M26
- Billable — Valid for Submission
- Not Chronic
M26.36 is a billable ICD-10-CM diagnosis code for insufficient interocclusal distance of fully erupted teeth (ridge). 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 angular cheilitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Any dental condition including traumatic injury, Disorders of jaw, and Disorders of teeth and gingiva.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Angular cheilitis
- Angular cheilitis due to lack of adequate intermaxillary vertical dimension
- Lack of adequate intermaxillary vertical dimension
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Lack of adequate intermaxillary vertical dimension of fully erupted teeth
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.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Tooth Disorders
Your teeth are made of a hard, bonelike material. There are four parts:
The full article covers:
- What are teeth?
- What are tooth disorders?
- What causes tooth disorders?
- What are the symptoms of tooth disorders?
- How are tooth disorders diagnosed?
- What are the treatments for tooth disorders?
- Can tooth disorders be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert M26.36 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M26.36Overview
What is the ICD-10 code for insufficient interocclusal distance of fully erupted teeth (ridge)?
The ICD-10-CM code for insufficient interocclusal distance of fully erupted teeth (ridge) is M26.36 (sometimes written as M2636). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is M26.36 (Anomalies of tooth position of fully erupted tooth or teeth) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report insufficient interocclusal distance of fully erupted teeth (ridge) on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does M26.36 group to?
When insufficient interocclusal distance of fully erupted teeth (ridge) 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 M26.36?
Under the General Equivalence Mappings, insufficient interocclusal distance of fully erupted teeth (ridge) converts to ICD-9-CM 524.36 (insuf interocclusl-teeth). The mapping is a direct match.
