| Researcher | Technique used | Purpose |
| 1. Chen et al. [25] | Hierarchical clustering | To analyze micro-array data. |
| 2. Chipman et al. [26] | Hybrid Hierarchical clustering. | To analyze micro-array data. |
| 3. Bertsimas et al. [27] | Clustering algorithm | To predict health care cost. |
| 4. Peng Y et al. [28] | Clustering algorithm | To detect healthcare frauds. |
| 5. Belciug et al. [29] | Hierarchical, partitioned and density-based clustering. | Efficient utilization of healthcare resources. |