Purpose: The aim of our study was to determine the incidence and extent of deep venous thrombosis in hospitalized patient of tertiary care hospital.Methodology: This was observational cross sectional study. The data of patients had been collected from Jinnah hospital Lahore, Pakistan. After taking informed consent, data was collected through the Doppler ultrasound which was performed for lower limb in symptomatic patients. Equipment used was TOSHIBA Xario (200) with linear probe frequency ranging from 7-10 MHz. The data analysis was performed with the help of SPSS version 24.Findings: Total 124 patients were included in this study in which the mean age of the patient was 45.38 ± 16.846 with a range of 14-90 years. The Mean weight of patients was = 70.31±9.285 with the range 48­-90kg. The females were 56 and males were 68 in number included in this study. Out of 124 patients, right leg DVT present in 44(35.5%), and left leg DVT present in 74(59.7%), and bilateral DVT present in 6(4.8%) of patients. Unique contribution to theory, practice and policy: It was concluded that age plays a significant role in the development of DVT. Patients with acute DVT have hypoechoic thrombus while the chronic DVT have hyperechoic echogenicity. DVT was most commonly seen in the left leg in comparison with right leg. Ultrasound is the best modality in the detection of DVT.