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 > Disorders Of Tooth Development And Eruption 520.* > 2008 ICD-9-CM Diagnosis 520.3 Mottled teeth  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 520.3 can be accessed here. 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 View the ICD-9-CM Volume 1 520.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. 520.3 also known as: Dental fluorosis Mottling of enamel Nonfluoride enamel opacities Index entries containing 520.3: Fluorosis (dental) (chronic) 520.3 Mottled teeth (enamel) (endemic) (nonendemic) 520.3 Mottling enamel (endemic) (nonendemic) (teeth) 520.3 Opacity, opacities enamel (fluoride) (nonfluoride) (teeth) 520.3