Chen Guangcheng says he doesn't know when he will be allowed to leave China despite an offer from from a university in the United States.
Mr Chen, 40, spent six days at the US embassy after escaping from house arrest in April. He says US officials are still barred from his hospital.
He says he has asked Chinese officials for help but he has not started doing the paperwork for a passport.
On Sunday, US Vice President Joe Biden said Washington expected China to stick to its commitment for him to study in the US, where he has been offered a fellowship by New York University.
Mr Chen left the embassy last Wednesday after accepting assurances of his safety. He later said that in view of threats against his family, he had decided to leave the country.
He has campaigned against forced abortions and sterilisations of women under China's one-child policy.