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Introduction People with diabetes mellitus (DM) have an increased risk for thrombosis compared with non-diabetic patients. Several studies showed contradicting in data on levels of protein C in people with type 2 DM and diabetic ulcers.Methods This is a descriptive and analytical cross-sectional study on protein C concentration of patients with type 2 DM with and without foot ulcers. The control group was the type 2 DM patients without foot ulcers, whereas the case group was the type 2 DM patients with a rigid diabetic foot ulcer based on the Wagner criteria. Blood samples are then taken after 8 to 10 hours of fasting to check for protein C concentration and hemostasis examination including platelet count, prothrombin time (PT),  activated partial thromboplastin time (aPTT), thrombin time (TT), fibrinogen levels, and D-dimers.Results Of a total of 20 samples, there was no statistically significant difference in protein C levels of diabetic foot ulcers with hypercoagulation compared with no diabetic foot ulcers with hypocoagulation and no significant correlation between grade diabetic foot ulcers and protein C concentration.

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