"One positive result has been returned from 538 people tested for COVID-19 in MLHD," the health district said in a statement.

NSW Health has advised that a 41-year-old man who recently returned home from a trip abroad has tested positive.

"The patient has been interviewed to identify his travel paths and potential contacts and anyone who has been in contact with this patient will be notified," the MLHD statement said.

"The patient is in self isolation and has taken measures to ensure he does not transmit the virus."

The health district has appealed to members of the public to practice hand hygiene and social distancing, which remain the most effective ways to reduce transmission of the virus.

"Reducing contact between people unless absolutely necessary, especially those in our population who may be more vulnerable or susceptible to the illness because of age or weakened immunity, is critical to slowing the spread and impact of COVID-19," the MLHD said.

Earlier on Sunday, the MLHD revealed it was awaiting the test results of a suspected case of COVID-19 in the district.

Albury Wodonga Health later confirmed a NSW person had returned a positive result to COVID-19 at its Wodonga health testing clinic.

While Albury Wodonga Health operates in Victoria, the patient is counted in the Murrumbidgee figures because they are a NSW resident.

The health district continues to urge people who have returned from overseas or come in contact with a confirmed case and are showing symptoms within 14 days including fever, sore throat, dry cough and shortness of breath to seek medical advice.

"Call the free-call coronavirus hotline 1800 022 222 and receive advice on the best course of action depending on their symptoms and risks," the health district stated.

"Medical staff will direct people to the nearest hospital or respiratory clinic, or advise them to stay home and self-monitor, or contact their GP.

"Or contact your GP to arrange an appointment. Let the GP practice know in advance if you have symptoms."

People needing advice about testing can also call the Murrumbidgee COVID-19 Hotline on 1800 831 099 for assessment between 7am and 11pm.

The wider public is encouraged to practise social distancing by avoiding crowds, maintaining a distance of 1.5 metres from others and avoiding handshakes, hugs and kisses and avoiding visiting vulnerable people such as those in hospitals or aged care facilities.