2026 ICD-10-CM Diagnosis Code M26.55Centric occlusion maximum intercuspation discrepancy
ICD-10-CM Codes›M00–M99›M26-M27›M26
- Billable — Valid for Submission
- Not Chronic
M26.55 is a billable ICD-10-CM diagnosis code for centric occlusion maximum intercuspation discrepancy. 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 abnormal intercuspation. 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.
- Abnormal intercuspation
- Centric occlusion - Centric relation discrepancy
- Centric occlusion maximum intercuspation discrepancy
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 1 Excludes
- centric occlusion NOS M26.59
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.
- centric occlusion maximum intercuspation - M26.55
- maximum intercuspation discrepancy - M26.55
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Discrepancy
- centric occlusion maximum intercuspation
- Occlusion, occluded
- centric (of teeth)
- maximum intercuspation discrepancy
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Jaw Injuries and Disorders
Your jaw is a set of bones that holds your teeth. It includes:
Read the full article at MedlinePlus
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Convert M26.55 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M26.55Overview
Is M26.55 (Dentofacial functional abnormalities) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report centric occlusion maximum intercuspation discrepancy on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does M26.55 group to?
When centric occlusion maximum intercuspation discrepancy 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 M26.55?
Under the General Equivalence Mappings, centric occlusion maximum intercuspation discrepancy converts to ICD-9-CM 524.55 (centric occl intrcsp dis). The mapping is a direct match.
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.
