M26.31
BillableCrowding of fully erupted teeth
M26.31 is the ICD-10-CM code for Crowding of fully erupted teeth. It is a billable, specific code valid for reimbursement.
M00-M99 Diseases of the musculoskeletal system and connective tissue
What this means — in plain language
MedlinePlus · NIHWhat are teeth? Your teeth are made of a hard, bonelike material. There are four parts: Enamel, your tooth's hard surface Dentin, the hard yellow part under the enamel Cementum, the hard tissue that covers the root and keeps your teeth in place Pulp, the soft connective tissue in the center of your tooth. It contains nerves and blood vessels. You need your teeth for many activities that you may take for granted.…
Read more about Tooth Disorders at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Conditions mapped to this code
MedlinePlus · NIHPlain-language health-topic references grounded in MedlinePlus (NIH/NLM).
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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