OBJECTIVES: In this study we performed Diabetic ketoacidosis (DKA) gap analysis for the residents of Lake county, IL based on the hospital discharge data collected between 2001- 2009. METHODS: The hospital discharge data between 2001-2009 for primary discharge diagnosis of DKA was analyzed. All patients (<4 yr to > 85yr ) were categorized in 10 age groups and comparative analysis were performed. Patient cases for DKA were identified using ICD-9 codes for DKA ( codes 250.10, 250.11, 250.12, 250.13). RESULTS: N= 827,355 discharge records were screened. Overall there were N=1788 cases that were discharged with the primary diagnosis of DKA reflecting a crude rate of 0 .2 %.  The reported national age –adjusted rate by the CDC in 2005 was 21.5 cases per 1000 patients (31.6 in < 44 y, 3.4 in 45-64y and 1.4 in patients > 65y). There were N=933 female and N=855 male cases. The overall age- adjusted rate per 1000 patients was 4.04 +/- 0.136 cases.  The most frequent length of stays were 1 day (n=288), 2 days (n=466), 3 days (n=410) or 4 days (N=258). Analysis of data based on residential zip codes ihas identified three suburbs with a high percentage of Hispanics and blacks with the highest reported cases (Waukegan= 363 cases, Zion= 163 cases and North Chicago= 109 cases). The overall age-adjusted DKA rate in Waukegan was 6.19 +/- .436 cases per 1000 patients which is significantly greater than the average calculated rate for residents of Lake County [OR=1.54 (1.40-1.68), P<0.0001] CONCLUSIONS: Data suggests a high rate of age-adjusted discharge rate for DKA in parts of Lake county, IL. USA, Village of Waukegan with a large percentage of Hispanic and black population has a significantly higher odds of hospital discharge with the diagnosis of DKA compared to rest of the Lake CTY.