M26.23 – Excessive horizontal overlap

ICD-10-CM 2027 diagnosis code · Dentofacial anomalies [including malocclusion] and other disorders of jaw

Billable code

ICD-10-CM code M26.23

Code: M26.23 (claims format: M2623)
Description: Excessive horizontal overlap
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
Block: M26-M27 Dentofacial anomalies [including malocclusion] and other disorders of jaw
Parent codes: M26 › M26.2

Notes for M26.23

Applicable to:

Excessive horizontal overjet

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block M26-M27

Excludes1 (not coded here):

hemifacial atrophy or hypertrophy (Q67.4)
unilateral condylar hyperplasia or hypoplasia (M27.8)

Index terms for M26.23

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in M26.2

M26.20 – Unspecified anomaly of dental arch relationshipBillable
M26.21 – Malocclusion, Angle's classHeader
M26.22 – Open occlusal relationshipHeader
M26.24 – Reverse articulationBillable
M26.25 – Anomalies of interarch distanceBillable
M26.29 – Other anomalies of dental arch relationshipBillable

Frequently asked questions

What is ICD-10 code M26.23?

M26.23 is the ICD-10-CM code for excessive horizontal overlap, in the block M26-M27 (Dentofacial anomalies [including malocclusion] and other disorders of jaw).

Is M26.23 a billable code?

Yes. M26.23 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does M26.23 belong to?

It belongs to category M26 – Dentofacial anomalies [including malocclusion].

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.