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2008 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 521 Diseases of hard tissues of teeth 521 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 521.0 Dental caries Localized destruction of the tooth surface initiated by decalcification of the enamel followed by enzymatic lysis of organic structures and leading to cavity formation. If left unchecked, the cavity may penetrate the enamel and dentin and reach the pulp. The three most prominent theories used to explain the etiology of the disease are that acids produced by bacteria lead to decalcification; that micro-organisms destroy the enamel protein; or that keratolytic micro-organisms produce chelates that lead to decalcification. 521.0 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 521.00 Unspecified dental caries Localized destruction of the tooth surface initiated by decalcification of the enamel followed by enzymatic lysis of organic structures and leading to cavity formation. If left unchecked, the cavity may penetrate the enamel and dentin and reach the pulp. The three most prominent theories used to explain the etiology of the disease are that acids produced by bacteria lead to decalcification; that micro-organisms destroy the enamel protein; or that keratolytic micro-organisms produce chelates that lead to decalcification. 521.00 is a specific code that can be used to specify a diagnosis 521.00 contains 6 index entries ICD-9-CM Diagnosis 521.01 Dental caries limited to enamel 521.01 is a specific code that can be used to specify a diagnosis 521.01 contains 6 index entries ICD-9-CM Diagnosis 521.02 Dental caries extending into dentine 521.02 is a specific code that can be used to specify a diagnosis 521.02 contains 2 index entries ICD-9-CM Diagnosis 521.03 Dental caries extending into pulp 521.03 is a specific code that can be used to specify a diagnosis 521.03 contains 3 index entries ICD-9-CM Diagnosis 521.04 Arrested dental caries 521.04 is a specific code that can be used to specify a diagnosis 521.04 contains 1 index entry ICD-9-CM Diagnosis 521.05 Odontoclasia 521.05 is a specific code that can be used to specify a diagnosis 521.05 contains 4 index entries ICD-9-CM Diagnosis 521.06 Dental caries pit and fissure 521.06 is a specific code that can be used to specify a diagnosis 521.06 contains 2 index entries ICD-9-CM Diagnosis 521.07 Dental caries of smooth surface 521.07 is a specific code that can be used to specify a diagnosis 521.07 contains 2 index entries ICD-9-CM Diagnosis 521.08 Dental caries of root surface Dental caries involving the tooth root, cementum, or cervical area of the tooth. 521.08 is a specific code that can be used to specify a diagnosis 521.08 contains 2 index entries ICD-9-CM Diagnosis 521.09 Other dental caries 521.09 is a specific code that can be used to specify a diagnosis 521.09 contains 4 index entries ICD-9-CM Diagnosis 521.1 Excessive attrition (approximal wear)(occlusal wear) 521.1 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 521.10 Excessive attrition, unspecified 521.10 is a specific code that can be used to specify a diagnosis 521.10 contains 6 index entries ICD-9-CM Diagnosis 521.11 Excessive attrition, limited to enamel 521.11 is a specific code that can be used to specify a diagnosis 521.11 contains 1 index entry ICD-9-CM Diagnosis 521.12 Excessive attrition, extending into dentine 521.12 is a specific code that can be used to specify a diagnosis 521.12 contains 1 index entry ICD-9-CM Diagnosis 521.13 Excessive attrition, extending into pulp 521.13 is a specific code that can be used to specify a diagnosis 521.13 contains 1 index entry ICD-9-CM Diagnosis 521.14 Excessive attrition, localized 521.14 is a specific code that can be used to specify a diagnosis 521.14 contains 1 index entry ICD-9-CM Diagnosis 521.15 Excessive attrition, generalized 521.15 is a specific code that can be used to specify a diagnosis 521.15 contains 1 index entry ICD-9-CM Diagnosis 521.2 Abrasion of teeth The pathologic wearing away of the tooth substance by brushing, bruxism, clenching, and other mechanical causes. It is differentiated from TOOTH ATTRITION in that this type of wearing away is the result of tooth-to-tooth contact, as in mastication, occurring only on the occlusal, incisal, and proximal surfaces. It differs also from TOOTH EROSION, the progressive loss of the hard substance of a tooth by chemical processes not involving bacterial action. (From Jablonski, Dictionary of Dentistry, 1992, p2) 521.2 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 521.20 Abrasion, unspecified 521.20 is a specific code that can be used to specify a diagnosis 521.20 contains 5 index entries ICD-9-CM Diagnosis 521.21 Abrasion, limited to enamel 521.21 is a specific code that can be used to specify a diagnosis 521.21 contains 1 index entry ICD-9-CM Diagnosis 521.22 Abrasion, extending into dentine 521.22 is a specific code that can be used to specify a diagnosis 521.22 contains 1 index entry ICD-9-CM Diagnosis 521.23 Abrasion, extending into pulp 521.23 is a specific code that can be used to specify a diagnosis 521.23 contains 1 index entry ICD-9-CM Diagnosis 521.24 Abrasion, localized 521.24 is a specific code that can be used to specify a diagnosis 521.24 contains 1 index entry ICD-9-CM Diagnosis 521.25 Abrasion, generalized 521.25 is a specific code that can be used to specify a diagnosis 521.25 contains 1 index entry ICD-9-CM Diagnosis 521.3 Erosion of teeth Progressive loss of the hard substance of a tooth by chemical processes that do not involve bacterial action. (Jablonski, Dictionary of Dentistry, 1992, p296) 521.3 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 521.30 Erosion, unspecified 521.30 is a specific code that can be used to specify a diagnosis 521.30 contains 4 index entries ICD-9-CM Diagnosis 521.31 Erosion, limited to enamel 521.31 is a specific code that can be used to specify a diagnosis 521.31 contains 1 index entry ICD-9-CM Diagnosis 521.32 Erosion, extending into dentine 521.32 is a specific code that can be used to specify a diagnosis 521.32 contains 1 index entry ICD-9-CM Diagnosis 521.33 Erosion, extending into pulp 521.33 is a specific code that can be used to specify a diagnosis 521.33 contains 1 index entry ICD-9-CM Diagnosis 521.34 Erosion, localized 521.34 is a specific code that can be used to specify a diagnosis 521.34 contains 1 index entry ICD-9-CM Diagnosis 521.35 Erosion, generalized 521.35 is a specific code that can be used to specify a diagnosis 521.35 contains 1 index entry ICD-9-CM Diagnosis 521.4 Pathological tooth resorption Resorption of calcified dental tissue, involving demineralization due to reversal of the cation exchange and lacunar resorption by osteoclasts. There are two types: external (as a result of tooth pathology) and internal (apparently initiated by a peculiar inflammatory hyperplasia of the pulp). (From Jablonski, Dictionary of Dentistry, 1992, p676) 521.4 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 521.40 Pathological resorption, unspecified 521.40 is a specific code that can be used to specify a diagnosis 521.40 contains 3 index entries ICD-9-CM Diagnosis 521.41 Pathological resorption, internal 521.41 is a specific code that can be used to specify a diagnosis 521.41 contains 3 index entries ICD-9-CM Diagnosis 521.42 Pathological resorption, external 521.42 is a specific code that can be used to specify a diagnosis 521.42 contains 3 index entries ICD-9-CM Diagnosis 521.49 Other pathological resorption 521.49 is a specific code that can be used to specify a diagnosis 521.49 contains 4 index entries ICD-9-CM Diagnosis 521.5 Hypercementosis A regressive change of teeth characterized by excessive development of secondary cementum on the tooth surface. It may occur on any part of the root, but the apical two-thirds are most commonly affected. (Dorland, 27th ed) 521.5 is a specific code that can be used to specify a diagnosis 521.5 contains 3 index entries ICD-9-CM Diagnosis 521.6 Ankylosis of teeth Solid fixation of a tooth resulting from fusion of the cementum and alveolar bone, with obliteration of the periodontal ligament. It is uncommon in the deciduous dentition and very rare in permanent teeth. (Jablonski's Dictionary of Dentistry, 1992) 521.6 is a specific code that can be used to specify a diagnosis 521.6 contains 2 index entries ICD-9-CM Diagnosis 521.7 Intrinsic posteruptive color changes of teeth Any change in the hue, color, or translucency of a tooth due to any cause. Restorative filling materials, drugs (both topical and systemic), pulpal necrosis, or hemorrhage may be responsible. (Jablonski, Dictionary of Dentistry, 1992, p253) 521.7 is a specific code that can be used to specify a diagnosis 521.7 contains 9 index entries ICD-9-CM Diagnosis 521.8 Other specified diseases of hard tissues of teeth 521.8 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 521.81 Cracked tooth 521.81 is a specific code that can be used to specify a diagnosis 521.81 contains 1 index entry ICD-9-CM Diagnosis 521.89 Other specific diseases of hard tissues of teeth 521.89 is a specific code that can be used to specify a diagnosis 521.89 contains 6 index entries ICD-9-CM Diagnosis 521.9 Unspecified disease of hard tissues of teeth 521.9 is a specific code that can be used to specify a diagnosis 521.9 contains 2 index entries