"Her medical team advised her that she is making good progress on all fronts, and they are confident she will make a full recovery", the State Department said on Wednesday. "She eager to get back to the office, and we will keep you updated on her schedule as it becomes clearer in the coming days", Philippe Reines, an aide to Secretary Clinton added in a statement.

The statement did not specify when Clinton would be back to work. According to an account in' The Washington Post' Hillary Clinton, 65, had appeared briefly outside New York Presbyterian Hospital-Columbia University Medical Center earlier in the day, accompanied by her husband, former president Bill Clinton, and their daughter, Chelsea.

The chief American diplomat, who has been out of public life for around three weeks, suffered a concussion in December after fainting due to stomach virus. She was hospitalized after an MRI scan revealed a clot.

Meanwhile, according to the State Department spokesperson on Saturday, before the clot was diagnosed, Clinton spoke to the United Nations envoy for Syria, Lakhdar Brahimi, about his recent meeting with embattled Syrian President Bashar al-Assad.

Clinton also called the prime minister of Qatar, the spokesperson said. President Barack Obama has picked Senator John Kerry to succeed Hillary Clinton, who hectically led American diplomacy on several issues around the globe in the last four years.