1946 – Stephen Youngberg completes medical school and receives his degree as a medical doctor from Loma Linda University; at the same time his wife, Verlene DeWitt, receives her degree in Nursing.

1959 – Walter Tynes meets Dr. Youngberg in South Texas. The pair decide to partner up to take health care to the less fortunate, and Mr. Tynes sets in motion the legal proceedings to incorporate the Pan American Health Service.

1960 – Pan American Health Service, Inc. is chartered in the State of Texas. Verlene DeWitt Youngberg goes to Honduras on a land-purchasing expedition to find the ideal location for a mission camp.

1960 –Stephen & Verlene Youngberg move from the Rio Grande Valley to Honduras with their four young children to serve in PAHS's remote outpost there. The clinic is opened for patients from the first day that Dr. Youngberg arrives in Peña Blanca with his mobil medical units.

1961 – PAHS co-founder and principal fundraiser, Walter Tynes, dies in an accident in Texas .

1962 – Thousands of patients flock in from the mountains each month for healthcare, and an army squad tent is set up as a hospital to help meet the high demand for health services.

1963 – Pan American Health Service is recognized by the Government of Honduras as a humanitarian organization and obtains a legal identity.

1965 – Childhood malnutrition is recognized by Dr. Youngberg as the single most deadly, yet preventable illness. With the donation of a barracks building from the Morrison-Knudson Company the Nutrition Hospital opens its doors to accept malnourished toddlers for nutritional rehabilitation.

1966 - The land on which the Campus rests is purchased after being leased from Dr. Joe DeWitt (Verlene's father) for 5 years. The purchase was providentially made possible thanks to three generous donations all received the day before the purchase option in the lease agreement expired.

The Late 1960's– In response to a powdered milk shortage the concept of a Food Industry is born, with the vision of producing low cost, high protein foods using Soy as a base ingredient.

1970 – A farm is purchased in the Comayagua Valley, its main purpose is to produce soy beans, peanuts and sunflower seeds - for their protein content - to use in the Food Industry. Overwhelmed with the number of recovered children who have been abandoned in the Nutrition Hospital the decision is made to send them to the new Farm to live- the first Boys and Girls Homes are established for these children whose own relatives have forsaken them.

1974 – Dr. Youngberg is named the Good Samaritan of the Year by Guidepost magazine; PAHS is involved in relief efforts after Hurricane Fifi roars through North Honduras.

The 1970's – Dr. Youngberg actively seeks ways to produce low cost, high protein food sources as a way to prevent the Kwashiorkor he sees so often. PAHS Food Industry is developed to produce soy products and highly nutritious bread.

1979 – The Farm in the Comayagua Valley is sold to simplify operations. The children originally housed in the Homes there are growing up, some move on and some move back to Peña Blanca.

1985 – PAHS education efforts are formalized when Escuela La Esperanza receives official recognition from the Honduras Ministry of Education. The primary school teaches children during the day and illiterate adults in the evenings.

1991 – Practical training to acquire job skills is voiced as a need by our local town officials when they request a partnership in developing a Technical School .

1996 – An agreement is signed with a USAID (United States Aid and International Development) initiated program to build a new facility for vocational training.

1998 – PAHS is heavily involved in the massive relief efforts going on around the country of Honduras following the devastation left by Hurricane Mitch.

1999 – As the PAHS organization turns Forty, the Escuela Tecnica Vocacional Dr. Stephen Youngberg opens its new gates to students from all over the Lake Yojoa Community to learn woodworking, auto mechanics and basic sewing.

2001 – Dr. Stephen Youngberg dies in Ft. Worth , Texas and his body is buried in Peña Blanca , Honduras .

2002 – Blueprints for several needed new buildings are drafted marking beginning of PAHS Rebuilding Phase; A strategic alliance is formed with Escuela Primaria Bilingue Bertha DeWitt to educate the children from our Homes, thus simplifying operations by closing Escuela La Esperanza 's day school. Adult literacy grades 1-9 are still offered.

2003 – The new Girls Dorm Building project begins, as Phase I of the New Hospital Project gets underway.

2004 – The thirty year old Casita Feliz is demolished and a new one made out of concrete and steel is begun in its location.

2005 – The Children's Nutritional Rehabilitation Hospital of PAHS celebrates forty years of helping poor children suffering malnutrition to recover. The Rebuilding Phase continues.