Children's Hospital of Philadelphia
The Children's Hospital of Philadelphia is one of the largest and oldest children's hospitals in the world. "CHOP" has been ranked as the best children's hospital in the United States by U.S. News & World Report and Child Magazine in recent years. As of 2007, it was ranked #1 in the nation for pediatrics.  The hospital is located next to the University of Pennsylvania and its physicians serve as the pediatrics department of Penn's School of Medicine.
CHOP has over 430 beds, 40 percent of which are allocated to neonatal, cardiac, and pediatric intensive care. Each year the hospital admits more than 15,000 children and more than 600,000 are seen in the emergency and outpatient departments.

# History
In 1855, Philadelphia had a population of about 460,000, and recorded 10,507 deaths. Leading causes of death were smallpox, typhoid, and scarlet fever. In the worst month of 1855, 300 children under 12 years old died, primarily of infectious diseases. A Philadelphia physician, Dr. Francis West Lewis, inspired by a visit to the new Great Ormond Street Hospital for Sick Children in London (founded 1852), enlisted Drs. T. Hewson Bache and R.A.F. Penrose to found the first children's hospital in North America.

## 1st Hospital 1855-66
On November 23, 1855 the following small advertisement appeared in the Philadelphia Public Ledger:
The first location of the original Children's Hospital was a small building on Blight Street (now Watts St). The hospital consisted of 12 beds and a dispensary. That year they recorded 67 inpatient admissions and 306 outpatient visits.

## 2nd Hospital 1866-1916
Childrens Hospital was relocated to 22nd Street between Locust and Walnut Sts after the American Civil War. This hospital consisted of 35 beds and a dispensary.
- Surgery was being performed by 1870.
- The first resident physician was appointed in 1873.
- Formal medical teaching in medical and surgical clinics began in 1877.
- A long-term care (convalescent) facility was opened as a County Branch near Overbrook.
- Capacity was increased to 94 beds by 1892.
- A nursing school, the Ingersoll Training School, was opened in 1894.
- In 1899 the County Branch convalescent facility was closed and the program and patients transferred to the Seashore House near Atlantic City, New Jersey.
- In 1900 the Catherwood Milk Laboratory was established.
- In 1914 the first Department for the Prevention of Disease in the nation was established.

## 3rd Hospital 1916-74
Construction adjacent to the 2nd hospital was begun in 1913 and the first unit was opened in 1916 extending toward 18th and Bainbridge Sts. In 1919 the hospital became affiliated with the University of Pennsylvania School of Medicine. The affiliation became steadily closer over the next 17 years, with the Children's Hospital becoming identical to the pediatric department of the school of medicine, with most of the attending physicians appointed jointly to both institutions.
- In 1925 the hospital became affiliated with the Philadelphia Child Guidance Clinic.
- The first formal allocation of funds to research was recorded in 1937.
- The nursing school was disbanded in 1945 and converted into an affiliate training center.
- A six-story research building next to the hospital was dedicated in 1954.
- In 1962 the first neonatal intensive care unit (NICU) in the nation was opened, along with a new neonatal surgical unit.
- In 1965 the first home care program for children was established.
- A Clinical Research Center under the auspices of the National Institutes of Health was opened in 1965.

## 4th Hospital 1974-present
Construction of the new hospital at a new site on the west side of the Schuylkill River at 34th Street and Civic Center Boulevard, adjacent to the campus of the University of Pennsylvania, was begun in 1969 and the first building was opened in 1974.  This present Children's Hospital complex occupies part of the site of the old Philadelphia General Hospital and Blockley Almshouse.
- A helicopter transport system for critically ill and injured children was inaugurated in 1973.
- CHOP celebrated its 150th anniversary on November 18, 2005.
Milestones and advances in pediatric care pioneered at CHOP include the first formal medical training in pediatrics, techniques for the correction of congenital heart malformations, incubators for newborn intensive care, home ventilator care, and vaccine development.
The Children's Hospital of Philadelphia is in Philadelphia's University City neighborhood, and since 2001 has been undergoing a $1.2 billion expansion that will double the hospital's size.  It is also beginning a project to build an additional set of new research and outpatient facilities on a large site across the street on Civic Center Boulevard.

# Rankings
The Children's Hospital of Philadelphia has been ranked the best hospital for children for
the fifth consecutive year by U.S.News & World Report. A detailed ranking
-f the finest pediatric facilities in the United States is published in the
publication's first stand-alone "America's Best Children's Hospitals"
issue.  Since the inception of the ranking system eighteen years ago, Children's Hospital of Philadelphia and Children's Hospital Boston have consistently been ranked in the top two, switching positions several times over the years..