The changes have been made in the National Medical Commission Bill passed by the Parliament from the version that was approved by the Cabinet.
The legislation provides for a common entrance examination for MBBS along with common counseling for all medical institutions in the country.
The bill proposes to replace the Medical Commission of India with a National Medical Commission to regulate all aspects of medical education, profession and institutions.
They said the AIIMS administration also assured them that the strike period, August 1 to 3, would be considered as "on duty".
The doctors have been boycotting work and demonstrating over certain provisions of the Bill since Thursday.
The resident doctors' associations of AIIMS, Safdarjung, RML and those attached with FORDA and URDA decided to continue their strike following meetings held till late night.
Thousands of doctors across the country protested against certain provisions in the National Medical Commission Bill, which the Rajya Sabha passed on Thursday.
The bill that seeks to repeal the Indian Medical Council Act 1956 was passed by a voice vote, amid a walkout by AIADMK.
National Medical Commission Bill: After Kerala, now doctors in Delhi threaten to go on indefinite strike
The Resident Doctors' Associations (RDA) of the AIIMS, RML and some other hospitals have given separate notices to the administration regarding the proposed strike.
Doctors in the private hospitals completely boycotted out-patient services, while those in state-run hospitals attended only to patients in the out-patient departments.
Tamil Nadu Indian Medical Association announced withdrawal of out-patient and other non-emergency services from 6 am on Wednesday to 6 am next day.
Doctors claim the bill will reduce accountability of private medical colleges, and the fee revision will prevent economically backward students from pursuing medical education.
The Bill, which said a number of such practitioners will be permitted to practice as community health providers, is likely to face stiff protest from doctors again.
The Bill, introduced by Health Minister Harsh Vardhan, also seeks to repeal the Indian Medical Council Act 1956, stating that the Council set up under it was corrupt.
The NMC Bill was first introduced in Parliament in December 2017, but lapsed with the dissolution of the 16th Lok Sabha.