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2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Digestive System 520-579 > Diseases Of Oral Cavity, Salivary Glands, And Jaws 520-529 > ICD-9-CM Diagnosis 520 Disorders of tooth development and eruption 520 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 520.0 Anodontia Congenital absence of the teeth; it may involve all (total anodontia) or only some of the teeth (partial anodontia, hypodontia), and both the deciduous and the permanent dentition, or only teeth of the permanent dentition. (Dorland, 27th ed) Having teeth in neither the mandible nor the maxilla. 520.0 is a specific code that can be used to specify a diagnosis 520.0 contains 12 index entries ICD-9-CM Diagnosis 520.1 Supernumerary teeth An extra tooth, erupted or unerupted, resembling or unlike the other teeth in the group to which it belongs. Its presence may cause malposition of adjacent teeth or prevent their eruption. 520.1 is a specific code that can be used to specify a diagnosis 520.1 contains 8 index entries ICD-9-CM Diagnosis 520.2 Abnormalities of size and form of teeth Anomaly of the tooth, found chiefly in upper lateral incisors. It is characterized by invagination of the enamel at the incisal edge. Two teeth united during development by the union of their tooth germs; the teeth may be joined by the enamel of their crowns, by their root dentin, or by both. 520.2 is a specific code that can be used to specify a diagnosis 520.2 contains 31 index entries ICD-9-CM Diagnosis 520.3 Mottled teeth A chronic endemic form of hypoplasia of the dental enamel caused by drinking water with a high fluorine content during the time of tooth formation, and characterized by defective calcification that gives a white chalky appearance to the enamel, which gradually undergoes brown discoloration. (Jablonski's Dictionary of Dentistry, 1992, p286) 520.3 is a specific code that can be used to specify a diagnosis 520.3 contains 4 index entries ICD-9-CM Diagnosis 520.4 Disturbances of tooth formation A form of AMELOGENESIS IMPERFECTA characterized by incomplete formation of the dental enamel and transmitted as an X-linked or autosomal dominant trait. It is also associated with vitamin A, C, or D deficiency, infectious disease, prematurity, birth injury, Rh incompatibility, trauma, or local infection. Small grooves, pits, and fissures are seen in mild cases, deep horizontal rows of pits in severe cases, or absence of enamel in extreme cases. (Dorland, 27th ed) A localized arrested tooth development which appears to involve most commonly the anterior teeth, usually on one side of the midline, most often the maxillary central and lateral incisors. Roentgenographically, the teeth have a ghostlike appearance. Calcification and bits of prismatic enamel may be found in the pulp and the enamel is thin and absent in part. (Jablonski, Illustrated Dictionary of Dentistry, 1982) A tooth's loss of minerals, such as calcium in hydroxyapatite from the tooth matrix, caused by acidic exposure. An example of the occurrence of demineralization is in the formation of dental caries. 520.4 is a specific code that can be used to specify a diagnosis 520.4 contains 16 index entries ICD-9-CM Diagnosis 520.5 Hereditary disturbances in tooth structure not elsewhere classified An apparently hereditary disorder of dentin formation, marked by a normal appearance of coronal dentin associated with pulpal obliteration, faulty root formation, and a tendency for peripheral lesions without obvious cause. (From Dorland, 27th ed) An autosomal dominant disorder of tooth development characterized by opalescent dentin resulting in discoloration of the teeth, ranging from dusky blue to brownish. The dentin is poorly formed with an abnormally low mineral content; the pulp canal is obliterated, but the enamel is normal. The teeth usually wear down rapidly, leaving short, brown stumps. (Dorland, 27th ed) An autosomal dominant or X-linked disorder in which there is faulty development of the dental enamel owing to agenesis, hypoplasia, or hypocalcification of the enamel. It is marked by enamel that is very thin and friable and frequently stained in various shades of brown. (Dorland, 27th ed) 520.5 is a specific code that can be used to specify a diagnosis 520.5 contains 12 index entries ICD-9-CM Diagnosis 520.6 Disturbances in tooth eruption A tooth that is prevented from erupting by a physical barrier, usually other teeth. Impaction may also result from orientation of the tooth in an other than vertical position in the periodontal structures. Predeciduous teeth present at birth. They may be well formed and normal or may represent hornified epithelial structures without roots. They are found on the gingivae over the crest of the ridge and arise from accessory buds of the dental lamina ahead of the deciduous buds or from buds of the accessory dental lamina. (From Jablonski, Dictionary of Dentistry, 1992) 520.6 is a specific code that can be used to specify a diagnosis 520.6 contains 42 index entries ICD-9-CM Diagnosis 520.7 Teething syndrome 520.7 is a specific code that can be used to specify a diagnosis 520.7 contains 5 index entries ICD-9-CM Diagnosis 520.8 Other specified disorders of tooth development and eruption 520.8 is a specific code that can be used to specify a diagnosis 520.8 contains 4 index entries ICD-9-CM Diagnosis 520.9 Unspecified disorder of tooth development and eruption 520.9 is a specific code that can be used to specify a diagnosis 520.9 contains 5 index entries