ICD-9 Diagnosis Code 521.00

Dental caries NOS

Diagnosis Code 521.00

ICD-9: 521.00
Short Description: Dental caries NOS
Long Description: Dental caries, unspecified
This is the 2014 version of the ICD-9-CM diagnosis code 521.00

Code Classification
  • Diseases of the digestive system (520–579)
    • Diseases of oral cavity, salivary glands, and jaws (520-529)
      • 521 Diseases of hard tissues of teeth

Information for Medical Professionals

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The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

Index of Diseases and Injuries
References found for the code 521.00 in the Index of Diseases and Injuries:


Information for Patients


Tooth Decay

Also called: Cavities, Dental caries

You call it a cavity. Your dentist calls it tooth decay or dental caries. They're all names for a hole in your tooth. The cause of tooth decay is plaque, a sticky substance in your mouth made up mostly of germs. Tooth decay starts in the outer layer, called the enamel. Without a filling, the decay can get deep into the tooth and its nerves and cause a toothache or abscess.

To help prevent cavities

  • Brush your teeth every day with a fluoride toothpaste
  • Clean between your teeth every day with floss or another type of between-the-teeth cleaner
  • Snack smart - limit sugary snacks
  • See your dentist or oral health professional regularly

  • Dental cavities
  • Dental plaque identification at home
  • Dental sealants
  • Plaque: What It Is and How to Get Rid of It - NIH (National Institute of Dental and Craniofacial Research)
  • Seal Out Tooth Decay: A Fact Sheet for Parents - NIH (National Institute of Dental and Craniofacial Research)
  • Tooth decay - early childhood
  • Tooth decay -- early childhood
  • Toothaches


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