Introduction: Community acquired pneumonia (CAP) and diabetes mellitus (DM) are common medical conditions which lead to increased morbidity, mortality and high hospitalization rates.

Objective: To determine the outcome and predictors of community acquired pneumonia in patients with diabetes mellitus.

Methodology: This study was hospital based descriptive case series carried out at the department of Medicine Hayatabad Medical Complex, Peshawar for duration of six months from December 2020 to June 2021. 150 patients were included in this study. All the information’s including name, age, sex, co-morbidity were recorded in pre-designed questionnaire. Data entry and analysis were done through Statistical package for social sciences (SPSS) verion20.0.

Results: Based on distribution of predictors, total leukocytes count greater than 12000 or less than 4000 was observed in 37(24.7%) patients, FBS equal to or greater than 126mg/d1 and RBS equal to or greater than 200mg/d1 was observed in 20(13.3%) patients, HbAl c greater than 6.5% was observed in 32(21.3%) patients, blood urea greater than 40mg/d1 in 15(10.0%) patients, serum creatinine greater than 1.2mg,/d1 in 20(13.3%) patients while serum sodium less than 130mEq/L was observed in 26(17.3%) patients. Based on outcomes, expired, survived and prolonged stay in hospital was observed in 67(44.7%), 48(32.0%) and 35(23.3%) patients respectively.

Conclusion: Our study concludes that diabetic patients with community acquired pneumonia have unique clinical features. The major predictors of diabetic patients with community acquired pneumonia were total leukocytes count, FBS, RBS, HbAl c, blood urea, serum creatinine and serum sodium. High mortality rate was observed in our study.