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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 > Diseases Of The Oral Soft Tissues Excluding Lesions Specific For Gingiva And Tongue 528.* > 2007 ICD-9-CM Diagnosis 528.2 Oral aphthae  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 Therefore, this code may be out of date.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 528.2 can be accessed here. A recurrent disease of the oral mucosa of unknown etiology. It is characterized by small white ulcerative lesions, single or multiple, round or oval. Two to eight crops of lesions occur per year, lasting for 7 to 14 days and then heal without scarring. (From Jablonski's Dictionary of Dentistry, 1992, p742) 528.2 is a specific code that can be used to specify a diagnosis 528.2 contains 12 index entries View the ICD-9-CM Volume 1 528.* hierarchy 528.2 also known as: Aphthous stomatitis Canker sore Periadenitis mucosa necrotica recurrens Recurrent aphthous ulcer Stomatitis herpetiformis 528.2 excludes: herpetic stomatitis (054.2) Index entries containing 528.2: Aphthae, aphthous - see also condition Bednar's 528.2 oral 528.2 stomatitis 528.2 ulcer (oral) (recurrent) 528.2 genital organ(s) NEC female 629.89 male 608.89 larynx 478.79 Bednar's aphthae 528.2 Canker (mouth) (sore) 528.2 rash 034.1 Periadenitis mucosa necrotica recurrens 528.2 Sore mouth 528.9 canker 528.2 Stomatitis 528.00 aphthous 528.2 herpetiformis 528.2 Ulcer, ulcerated, ulcerating, ulceration, ulcerative 707.9 aphthous (oral) (recurrent) 528.2 genital organ(s) female 616.89 male 608.89 mouth 528.2