Staff from a Domino's Pizza in Oregon saved a their Number 1 customer's life after realizing he hadn't ordered a pizza in 11 days.

Employees at the Salem shop became worried after Kirk Alexander - a 47-year-old who has been a regular customer for seven years - hadn't called in to the store in nearly two weeks, so they sent a delivery driver to his home to check up on him.

Tracey Hamblen, an employee, knocked on Alexander's door on Sunday, just after midnight, but he didn't respond. She could see lights and a television on inside.

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Sarah Fuller, a general manager at a Domino's Pizza in Salem, Oregon, says her staff helped save well-known customer Kirk Alexander's life after becoming worried that he hadn't ordered from the store in 11 days

A delivery driver was sent to Alexander's home (pictured) for a wellness check just after midnight on Sunday, and after he didn't answer the door, she called 911. Marion County sheriff's deputies found Alexander suffering medical problems that could have ended his life

Video courtesy KATU

Hamblen tried to call the customer, but it went straight to voicemail.

After not hearing from Alexander, Hamblen called 911, while Jenny Seiber, a Domino's assistant manager, called authorities' non-emergency line, according to Oregon Live.

Marion County sheriff's deputies arrived and heard a man calling for help from inside the home.

They found Alexander suffering medical problems that could have ended his life, Marion County Sheriff's Office spokesman Lt Chris Baldridge said.

He was taken to the hospital and was in stable condition as of Monday morning, the sheriff's office said in a statement.

The office would not reveal what medical problems Alexander was experiencing, but said he suffers from severe health problems.

Paramedics told KOIN that Alexander was on the ground of his home when they arrived, and that they believed he had a stroke. It is unknown when he suffered the medical problems.

Seiber said that Alexander is a very well-known customer, but he doesn't have a regular order - he'll order anything from pasta or pizza to sandwiches or wings.

'It's never the same thing every time,' she said.

She added that Alexander is quiet, but friendly and nice, saying employees at the restaurant were 'worried a little bit' after not hearing from him for 11 days.

Staff said Alexander is a very well-known customer at the restaurant (pictured), but he doesn't have a regular order - he'll order anything from pasta or pizza to sandwiches or wings

General manager Sarah Fuller told KOIN that Alexander has been ordering from the restaurant since 2009.

'He orders every day, every other day,' Fuller said. 'His order pops up on the screen because he orders online. So we see it come across the screen and we're like, "Oh, Kirk's order".'

She added that Alexander is 'just an important customer that's part of our family here at Domino's.

'He orders all the time, so we know him. I think we were just doing our job checking in on someone we know who orders a lot. We felt like we needed to do something.'

Jenny Fouracre, director of public relations at Domino's headquarters in Ann Arbor, Michigan, told the Statesman Journal that the store's efforts were consistent with the company's customer service standards.

She said: 'We are proud of our team members who took the initiative to reach out and help a regular customer who was in distress.

'There are thousands of Domino’s stores across the country, but every store is really a part of their neighborhood, delivering to people in their homes, which means we often get to know our customers well.

'We have many stories of how our stores have helped regular customers in ways that are big and small over the years, which is a level of customer service and commitment to our communities that we hope everyone will emulate.'

Fuller told the Statesman Journal that she agreed with Fouracre's statement.

'We're like a family here, and we were glad we were able to do something to help,' she said. 'We hope he's able to fully recover from this.'