Secretary of State Hillary Clinton leaves New York Presbyterian Hospital on Jan. 2, 2013. (Reuters)

Secretary of State Hillary Clinton will return to work next week, a State Department spokeswoman said Thursday.

"Some of the senior staff who spoke to her about half an hour ago say that she's sounding terrific, upbeat, raring to go," Victoria Nuland said. "She's looking forward to getting back to the office. She is very much planning to do so next week. And we'll have further, precise details about that as she continues to make progress."

Nuland added that discussions are underway with the House and Senate foreign relation committees over Clinton's delayed testimony on the Sept. 11 attacks in Benghazi. "She is committed to testifying, and we are working with the committees on an appropriate set of dates," she said. 

Clinton was discharged from a New York City hospital Wednesday evening after three days of treatment for a potentially dangerous blood clot in her head, the State Department said.

“Her medical team advised her that she is making good progress on all fronts, and they are confident she will make a full recovery,” Clinton aide Philippe Reines said in a statement. 

Nuland said before Clinton’s discharge that the secretary had been keeping in touch with her office by phone.

“She has been talking to her staff, including today,” Nuland said. “She’s been quite active on the phone.”

Anne Gearan contributed to this report.