As you have asked about the Central Government Health Scheme (CGHS), I am giving you information about it, check below for the details

It was started to provide comprehensive medical care facilities to Central Government employees, pensioners and their dependents residing in CGHS covered cities.

The main components of the Scheme are:

The dispensary services including domiciliary care
F. W. & M.C.H. Services
Specialist’s consultation facilities both at dispensary, polyclinic and hospital level including X-Ray, ECG and Laboratory Examinations
Hospitalization
Organization for the purchase, storage, distribution and supply of medicines and other requirements
Health Education to beneficiaries

The Central Govt. Health Scheme is applicable to the following categories of people residing in CGHS covered cities:

All Central Govt. Servants paid from Civil Estimates
Pensioners drawing pension from Civil Estimates and their family members
Members and Ex-members of Parliament
Judges of the Supreme Court and High Court
Freedom Fighters
Central Government Pensioners, Employees of Semi-Autonomous bodies/Semi Government Organisations
Accredited Journalists
Ex-Governors and Ex-Vice-Presidents of India