"intern in" is correct and usable in English
You can use it to indicate that someone is interning at a specific place or organization. For example, "Jack is interning in a law office this summer."
I MET her in 2011, during my first few weeks as an intern in internal medicine.
Dr. Levinson, 27, is an intern in internal medicine at New York University Downtown Hospital.
The bridegroom, 31, is an intern in internal medicine at Methodist Hospital in Houston.
Next month, she is to become an intern in internal medicine at N.Y.U.
She is to become an intern in internal medicine at Massachusetts General Hospital next month.
She is an intern in internal medicine at the Johns Hopkins Hospital in Baltimore.
She is to become an intern in internal medicine at New York Presbyterian Hospital this month.
The bride, 29, is an intern in internal medicine at Beth Israel Medical Center.
Reagins, 40, joined the Angels as an intern in 1992.
Mr. Paterson first hired Mr. Johnson as an intern in 1999.
She was an intern in 2008, as a high school student from Croton-on-Hudson Croton-on-Hudson Croton-on-Hudson
