Few people, let alone those just 31 years old, have amassed the accolades and riches bestowed on Elizabeth Holmes, founder and chief executive of the blood-testing start-up Theranos.

This year President Obama named her a United States ambassador for global entrepreneurship. She gave the commencement address at Pepperdine University. She was the youngest person ever to be awarded the Horatio Alger Award in recognition of “remarkable achievements accomplished through honesty, hard work, self-reliance and perseverance over adversity.” She is on the Board of Fellows of Harvard Medical School.

She has been showered with rapturous media attention. Time named her one of the 100 Most Influential People in the World this year. She was the subject of lengthy profiles in The New Yorker and Fortune. Over the last week, she appeared on the cover of T: The New York Times Style Magazine, and Glamour anointed her one of its eight Women of the Year. She has been on “Charlie Rose,” as well as on stage at the Clinton Global Initiative, the World Economic Forum at Davos and the Aspen Ideas Festival, among numerous other conferences.

Theranos, which she started after dropping out of Stanford at age 19, has raised more than $400 million in venture capital and has been valued at $9 billion, which makes Ms. Holmes’s 50 percent stake worth $4.5 billion. Forbes put her on the cover of its Forbes 400 issue, ranking her No. 121 on the list of wealthiest Americans.