2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Symptoms, Signs, And Ill-Defined Conditions 780-799 > Nonspecific Abnormal Findings 790-796 > Nonspecific Findings On Examination Of Blood 790.* > 2008 ICD-9-CM Diagnosis 790.21 Impaired fasting glucose  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 Therefore, this code may be out of date.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 790.21 can be accessed here. 790.21 is a specific code that can be used to specify a diagnosis 790.21 contains 4 index entries View the ICD-9-CM Volume 1 790.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. 790.21 also known as: Elevated fasting glucose Index entries containing 790.21: Elevation glucose fasting 790.21 Findings, abnormal, without diagnosis (examination) (laboratory test) 796.4 blood sugar level 790.29 high 790.29 fasting glucose 790.21 glucose 790.29 elevated fasting 790.21 Impaired, impairment (function) glucose fasting 790.21