Règle correspondante
Peru
Practice Relating to Rule 26. Medical Activities
Section B. Respect for medical secrecy
Peru’s IHL Manual (2004) states:
Medical personnel providing medical services in armed conflicts have a duty to respect the principles of medical ethics as in peacetime. They must behave in the following way:
(3) respect the secrets confided in them. 
Peru, Manual de Derecho Internacional Humanitario para las Fuerzas Armadas, Resolución Ministerial Nº 1394-2004-DE/CCFFAA/CDIH-FFAA, Lima, 1 December 2004, § 84.a.(3).
The manual further states:
Medical personnel must not be compelled to give information concerning the wounded and sick in their care.
This refers to information that would, in their opinion, prove harmful to the patients concerned or to their families. This right implies a confidential relationship between patients and those treating them.
There are, however, exceptions to this rule. Regulations for the compulsory notification of communicable diseases must be respected, taking into account the general interest. 
Peru, Manual de Derecho Internacional Humanitario para las Fuerzas Armadas, Resolución Ministerial Nº 1394-2004-DE/CCFFAA/CDIH-FFAA, Lima, 1 December 2004, § 93.e.
Peru’s IHL and Human Rights Manual (2010) states:
Medical personnel must not be compelled to give information concerning the wounded and sick in their care.
This principle refers to information that would, in their opinion, prove harmful to the wounded and sick or to their families. This right implies a confidential relationship between patients and those tasked with treating them.
There are, however, exceptions to this rule. Regulations for the compulsory notification of communicable diseases must be respected, taking into account the general interest. 
Peru, Manual de Derecho Internacional Humanitario y Derechos Humanos para las Fuerzas Armadas, Resolución Ministerial No. 049-2010/DE/VPD, Lima, 21 May 2010, § 84(e), p. 286.
The manual also states:
Medical personnel providing medical services in armed conflicts have a duty to respect the principles of medical ethics as they would in peacetime. They must behave in the following way:
(3) Respect the secrets confided in them. 
Peru, Manual de Derecho Internacional Humanitario y Derechos Humanos para las Fuerzas Armadas, Resolución Ministerial No. 049-2010/DE/VPD, Lima, 21 May 2010, § 75(a)(3), p. 273.