ICD-10-CM
ICD-10 code for Crowding, tooth, teeth, fully erupted: M26.31
The ICD-10-CM index points "Crowding, tooth, teeth, fully erupted" to M26.31, Crowding of fully erupted teeth. M26.31 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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More specific codes in M26
A header groups codes and is not billed. A billable code is one you can report.
- M26Dentofacial anomalies [including malocclusion]Header
- M26.0Major anomalies of jaw sizeHeader
- M26.00Unspecified anomaly of jaw sizeBillable
- M26.01Maxillary hyperplasiaBillable
- M26.02Maxillary hypoplasiaBillable
- M26.03Mandibular hyperplasiaBillable
- M26.04Mandibular hypoplasiaBillable
- M26.05MacrogeniaBillable
- M26.06MicrogeniaBillable
- M26.07Excessive tuberosity of jawBillable
- M26.09Other specified anomalies of jaw sizeBillable
- M26.1Anomalies of jaw-cranial base relationshipHeader
- M26.10Unspecified anomaly of jaw-cranial base relationshipBillable
- M26.11Maxillary asymmetryBillable
- M26.12Other jaw asymmetryBillable
- M26.19Other specified anomalies of jaw-cranial base relationshipBillable
- M26.2Anomalies of dental arch relationshipHeader
- M26.20Unspecified anomaly of dental arch relationshipBillable
- M26.21Malocclusion, Angle's classHeader
- M26.22Open occlusal relationshipHeader
- M26.23Excessive horizontal overlapBillable
- M26.24Reverse articulationBillable
- M26.25Anomalies of interarch distanceBillable
- M26.29Other anomalies of dental arch relationshipBillable
- M26.3Anomalies of tooth position of fully erupted tooth or teethHeader
- M26.30Unspecified anomaly of tooth position of fully erupted tooth or teethBillable
- M26.31Crowding of fully erupted teethBillable
- M26.32Excessive spacing of fully erupted teethBillable
- M26.33Horizontal displacement of fully erupted tooth or teethBillable
- M26.34Vertical displacement of fully erupted tooth or teethBillable
- M26.35Rotation of fully erupted tooth or teethBillable
- M26.36Insufficient interocclusal distance of fully erupted teeth (ridge)Billable
- M26.37Excessive interocclusal distance of fully erupted teethBillable
- M26.39Other anomalies of tooth position of fully erupted tooth or teethBillable
- M26.4Malocclusion, unspecifiedBillable
- M26.5Dentofacial functional abnormalitiesHeader
- M26.50Dentofacial functional abnormalities, unspecifiedBillable
- M26.51Abnormal jaw closureBillable
- M26.52Limited mandibular range of motionBillable
- M26.53Deviation in opening and closing of the mandibleBillable
- M26.54Insufficient anterior guidanceBillable
- M26.55Centric occlusion maximum intercuspation discrepancyBillable
- M26.56Non-working side interferenceBillable
- M26.57Lack of posterior occlusal supportBillable
- M26.59Other dentofacial functional abnormalitiesBillable
- M26.6Temporomandibular joint disordersHeader
- M26.60Temporomandibular joint disorder, unspecifiedHeader
- M26.61Adhesions and ankylosis of temporomandibular jointHeader
- M26.62Arthralgia of temporomandibular jointHeader
- M26.63Articular disc disorder of temporomandibular jointHeader
- M26.64Arthritis of temporomandibular jointHeader
- M26.65Arthropathy of temporomandibular jointHeader
- M26.69Other specified disorders of temporomandibular jointBillable
- M26.7Dental alveolar anomaliesHeader
- M26.70Unspecified alveolar anomalyBillable
- M26.71Alveolar maxillary hyperplasiaBillable
- M26.72Alveolar mandibular hyperplasiaBillable
- M26.73Alveolar maxillary hypoplasiaBillable
- M26.74Alveolar mandibular hypoplasiaBillable
- M26.79Other specified alveolar anomaliesBillable
Excludes2
Excludes2 means the other condition can be reported with this one when both are documented.
From M26.3. A note on a category applies to every code under it.
Related conditions
Related pages
- M26.31 code detailsNotes, nearby codes, CMS-HCC group
- Category M26Every code under it
- Chapter 13Diseases of the musculoskeletal system
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Crowding, tooth, teeth, fully erupted?
The ICD-10-CM index points "Crowding, tooth, teeth, fully erupted" to M26.31, Crowding of fully erupted teeth. M26.31 is a billable code.
Is M26.31 billable?
Yes. M26.31 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to M26.31?
The CDC tabular list gives 1 Excludes2 note (may be coded together when both are documented) for M26.31 and the categories above it. They are listed on this page.
What chapter is M26.31 in?
Chapter 13. Diseases of the musculoskeletal system.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.