NSW Deputy State Coroner Carmel Forbes has delivered the findings of the inquest into the death of Kelvin George Gardoll.

Magistrate Forbes found the 61-year-old died of lung cancer on August 4, 2014, in the palliative care unit at Long Bay Correctional Complex Hospital.

The father-of-eight had worked as a labourer and also at a mine in Newcastle.

The coronial report said he suffered from chronic health issues including diabetes, moderate chronic kidney disease, chronic obstructive pulmonary disease, ischaemic heart disease, chronic emphysema and "painful diabetic peripheral neuropathy" upon entering custody in September 2011.

That same year he had a skin lesion removed while in custody.

A CT scan in June 2013 found multiple lesions on Mr Gardoll's lung, and he was transported to Long Bay Gaol and admitted to hospital on several occasions to undergo chemotherapy.

A doctor noted Mr Gardoll had risk factors for developing lung lesions because of "his lengthy history of smoking" but was of the opinion he received appropriate care and treatment while in custody.

The inquest heard Mr Gardoll was aware his condition was "terminal" and he had signed a "not for resuscitation" directive.

By June 2014 his disease had caused increased shortness of breath and pain requiring oxygen therapy. He suffered a fall on July 15 and his health continued to deteriorate, the report said.

Medical notes made on August 3 said he had "poor oxygen saturation" and needed help with daily care.

The following day his family visited him for the last time before he died at 12.15pm.

A detective from the Corrective Services investigations unit attended the jail and found nothing suspicious about Mr Gardoll's death, the report said.

The Deputy State Coroner concluded actions by Corrective Services and Justice Health did not contribute to Mr Gardoll's death and his medical care and treatment in custody were "appropriate".