Valleywise Health: Over 140 years of putting our patients first.

We’ve been around for nearly a century-and-a-half, and our commitment to providing the best care for you and other Valley residents has remained the same. Click through the timeline below to see how we’ve grown over the years to better serve more of our community’s needs.

Peoria location image

Valleywise Comprehensive Health Center – Peoria opens at Grand Avenue and Cotton Crossing.

top 100 hospitals - color

Valleywise Health Medical Center Named Among the Nation’s “100 Top Hospitals” by IBM Watson Health. Learn more here.

Valleywise Health Arizona Children's Center

Valleywise Health breaks ground on new medical center at 24th Street and Roosevelt. Watch the ceremony here.


MIHS reopens the Emergency Department at Maryvale hospital and opens 48 behavioral health beds, with plans for a total of 192 beds.

Valleywise Health announces purchase of Valleywise Behavioral Health Center - Maryvale

Groundbreaking for new West Valley Primary and Specialty Care Center in Peoria.

Valleywise Health announces purchase of Valleywise Behavioral Health Center – Maryvale

MIHS, Creighton University School of Medicine, Dignity Health St. Joseph’s Hospital and Medical Center, and District Medical Group, Inc., announce the Creighton University – Arizona Health Education Alliance.

Pop superstar Taylor Swift visits young burn patient in the Arizona Burn Center.


District Board of Directors awards Vanir Construction Management, Inc. a contract to provide Integrated Program Management Construction Services for a new health care system.

MIHS opens a 14 bed Adolescent Behavioral Health Unit at its Desert Vista Behavioral Health Center in Mesa.

MIHS opens the First Episode Center to treat teens and young adults dealing with a first psychotic break.


District Board votes unanimously to accept a Proposition 480 plan with objectives for rebuilding health care system.


Center for Disease Control designated MIHS as an Ebola and Infectious Disease Treatment Center.

MIHS opens new Behavioral Health Unit on the campus of Maricopa Medical Center.

Steve Purves, President and CEO, begins “100 Day Workout” initiative that leads to $160 million financial turnaround of MIHS in 2 years.


Valleywise History

Bond Advisory Committee recommended the issuance of General Obligation Bonds not to exceed $935 Million.

Maricopa County voters approve Proposition 480 by an overwhelming margin of approximately 64%.

Maricopa County Special Health Care District Board voted unanimously to place a General Obligation Bond on the ballot.

Betsey Bayless

Betsey Bayless was appointed President Emeritus of the Maricopa Integrated Health System in September 2013 by the organization’s five member Governing Board after leading the Valley’s only public health system for eight years as President and Chief Executive Officer.


Steve Purves

Steve Purves becomes President and CEO of MIHS.


Bond Advisory Committee formed.


Refugee Women’s Clinic opened.

janet napolitano signing

Maricopa County voters approved Special Health Care District.


Renovated Burn Center dedicated and renamed The Arizona Burn Center.


Maricopa Medical Center expanded to 555 beds.

The graduate medical education program was the largest in the entire country.

woman holding child 1993

First 24-hour pediatric emergency department established.

The Comprehensive Health Center opened.

macdonald wood plaque

Burn unit classified as a burn center.

New trauma receiving rooms built.


Maricopa Integrated Health System formed.

Valleywise history building

The county’s first HIV specialty clinic, the McDowell Healthcare Center, established.

child patient 1988

Helipad enlarged to accommodate four helicopters.

A crisis nursery for abused children built.


Name changed to Maricopa Medical Center to reflect a more positive public perception.

valleywise building 1978

a 92-bed behavioral health annex opened.

Maricopa County Hospital Women’s Auxiliary formed.

burn unit entrance 1976

New burn unit building built.


The crisis nursery was built at the east end of the hospital campus

hospital ribbon cutting 1965

The new Maricopa County General Hospital opened (the current Valleywise Health location)


Arizona Health Commissioner George Speedlove, County Health Commissioner Stan Farnsworth, MacDonald Wood, Derrill Manley, county hospital advisory board member Al Brewer, and Maricopa Medical Society President John Ash break ground for the new hospital.

man with young patient in hospital room 1965

Arizona Burn Center founded.

MIHS opens the first Trauma Center in the state of Arizona.

1962 maternity nurse holding newborn

New maternity wing built.


The first hospital advisory board was formed.

doctor reading 1958

Medical library created to serve the residency programs.

patient having heart rate taken 1954

100-bed tuberculosis wing built.


Maricopa County General Hospital accredited by the Joint Commission on the Accreditation of Hospitals.

maricopa county hospital office 1952

MIHS has one of the oldest and largest physician training programs in Arizona. The American Medical Association approved teaching hospital status for MIHS in 1952 and the medical education program began the following academic year.


Multiple additions to the hospital provided service space for medical, pediatric, obstetrical and surgical patients. The new building featured air conditioning and added 61 beds, bringing the total beds to 278.


The hospital was licensed as a health care facility by the Arizona Department of Health Services.


Phoenix and its surrounding area began to be called “The Valley of the Sun,” which was an advertising slogan invented to boost tourism.


Arizona became a state.


County hospital (convalescent poor farm and hospital with 56 patients) relocated to Durango and 35th Avenue.


Phoenix became the territorial capital


First county hospital opened near 7th Avenue (and Roosevelt Street)


County established a pest house (contagious disease) within the city limits


Small hospital developed by Dr. Wharton with three county patients


Maricopa County created


Phoenix formed with 320 acres and 235 inhabitants


Territorial law set up to “provide for indigent sick of the country”


Arizona territory established