You may go thru:
Indian Medical Council (Professional conduct, Etiquette and Ethics) Regulations, 2002
1.3 Maintenance of medical records:
1.3.2. If any request is made for medical records either by the patients / authorised attendant or legal authorities involved, the same may be duly acknowledged and documents shall be issued within the period of 72 hours.
1.3.4 Efforts shall be made to computerize medical records for quick retrieval.
7. MISCONDUCT :
7.2 If he/she does not maintain the medical records of his/her indoor patients for a period of three years as per regulation 1.3 and refuses to provide the same within 72 hours when the patient or his/her authorised representative makes a request for it as per the regulation 1.3.2.