Dr. Kumar possesses significant expertise in managing medically compromised patients and addressing oral health complications arising from systemic diseases. She is deeply involved in training the next generation of professionals in SCD, mentoring candidates pursuing certificates, diplomas, and master's degrees in the specialty. Her contributions extend beyond clinical practice into shaping policy, as she actively participates in the creation of national and international oral healthcare guidelines. These include protocols for patients with cancer, thalassaemia, sickle cell disease, renal conditions, and dementia.