It expanded its developments in Thalawathugoda area in 2013 making it one of the largest ever known tertiary hospital chains in Sri Lanka.

[citation needed] Hemas Hospitals also operates the largest medical diagnostic laboratory chain in Sri Lanka.

This is the first-ever known tertiary care private hospital established in the Gampaha District.

Within the past few years, the hospital has come along with a breach of development that features 24/7 emergency access for patients and an online consultation system.

The facilities of Hemas Hospital Wattala also includes laboratory, MRI Scans, CT Scans, Ultrasound Scans, Digital X-Ray, Mammography, Dexa Scans, Endoscopy, Laparoscopic surgery, cystoscopy, Fertility center, Cosmetic center, health checks, general surgery, orthopedic surgery, gastrointestinal surgery, kidney transplant, weight loss surgery, gynecology, obstetrics, neurosurgery, pediatrics, and internal medicine.