Greater Shepparton has six cases of COVID-19, rising by three overnight, according to the state's health department.
Goulburn Valley Health chief executive Matt Sharp said the additional people who have tested positive for the virus were assessed in the hospital's acute respiratory clinic, and have been receiving follow-up treatment from their doctors.
"It is understood these people have been self-isolating prior to the positive COVID-19 test and are now in quarantine," he said.
Mr Sharp also said the one GV Health inpatient with confirmed COVID-19 has remained in isolation, and has been undergoing treatment.
The Department of Health and Human Services is currently completing contact tracing and follow-up for these cases.
The number of positive diagnoses has soared again overnight to 821, with 146 located in regional Victoria.
Moira Shire is still reporting six cases.
Twenty-nine are in hospital across the state, including one at GV Health.
At this point in time there are 26 confirmed cases of COVID-19 in Victoria that may have been acquired through community transmission.
More than 42,000 Victorians have been tested to date.
A number of cases remain under investigation.