A patient is any recipient of health care services. The patient is most often ill or injured and in need of treatment by a physician, advanced practice registered nurse, veterinarian, or other health care provider.

The word patient originally meant 'one who suffers'. This English noun comes from the Latin word patiens, the present participle of the deponent verb, patior, meaning 'I am suffering,' and akin to the Greek verb πάσχειν (= paskhein, to suffer) and its cognate noun πάθος (= pathos).

An outpatient (or out-patient) is a patient who is not hospitalized for 24 hours or more but who visits a hospital, clinic, or associated facility for diagnosis or treatment. Treatment provided in this fashion is called ambulatory care. Outpatient surgery eliminates inpatient hospital admission, reduces the amount of medication prescribed, and uses the physician's time more efficiently. More procedures are now being performed in a surgeon's office, termed office-based surgery, rather than in a hospital-based operating room. Outpatient surgery is suited best for healthy patients undergoing minor or intermediate procedures (limited urologic, ophthalmologic, or ear, nose, and throat procedures and procedures involving the extremities).

Demetria Devonne "Demi" Lovato (born August 20, 1992) is an American singer-songwriter, musician, and actress. Her earliest roles included Angela on Barney & Friends, before she became better known for her starring roles in the Camp Rock movies, as Sonny Munroe in the Disney sitcom Sonny with a Chance, and as the star of the 2009 movie Princess Protection Program. She is also involved in philanthropic activities through charity work and various social and environmental causes.

As a solo musical artist, Lovato released her debut album Don't Forget on September 23, 2008. The album debuted at number two on the Billboard 200 selling 89,000 copies in the first week. It has since shipped over 500,000 copies, earning a gold certification in the United States. Lovato released her second album, Here We Go Again, on July 21, 2009. The album debuted at number one on the Billboard 200, selling 108,000 copies in the first week. Her third studio album, Unbroken, was released on September 20, 2011 and peaked at number four on the Billboard 200. She is working on her fourth studio album.

Richard Davies deBronkart Jr (born February 18, 1950), widely known as e-Patient Dave, is a cancer patient and blogger who, in 2009, became a noted activist for healthcare transformation through participatory medicine and personal health data rights.

In January 2007, a routine shoulder x-ray incidentally disclosed a shadow in the lung, which turned out to be metastasized kidney cancer (stage IV, grade 4 renal cell carcinoma). His median survival time at diagnosis was 24 weeks. A member of online communities since CompuServe in 1989, he responded by seeking online resources in addition to receiving treatment at Beth Israel Deaconess Medical Center.

A frequently cited aspect of deBronkart's case is the multiple ways he used the Internet.

His kidney was removed laparoscopically and he was treated in a clinical trial of high-dose interleukin-2 (HDIL-2), ending 7/23/07, which was effective in reducing the cancer, although his femur ultimately broke from damage caused by the disease. Visible lesions on follow-up CT scans have continued to shrink for two years, and are presumed dead.