According to the hospital administration, the doctor got the infection from relatives who returned from abroad.
"The hospital, including the OPD, has been closed for sanitisation," an official said.
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The hospital is also contacting the patients who came in contact of the doctor and asking them to get quarantined. This is the third case of a doctor getting the infection.
Before this, two doctors of the Mohalla Clinic -- in Babarpur and in Maujpur -- were tested positive for coronavirus.
The authorities had asked their patients for self-quarantine at home.
Delhi's coronavirus patient count has reached 120, with 49 people having travel history to foreign countries.