The former East Hartford doctor convicted of sexually assaulting a patient has pleaded no contest to billing Medicaid for the appointment during which the assault occurred, according to a press release from the state Division of Criminal Justice.

Edwin Njoku, 53, was convicted today of second-degree larceny by defrauding a public community, a felony, and 18 months were added to his existing sentence of five years in prison.

Njoku is charged with billing Medicaid $37.48 for medical treatment that his patient never received after he sexually assaulted her in his office in 2011, according to the release.

In August, he was convicted of misdemeanor sexual assault and tampering with a witness, but acquitted of raping the female patient, a Medicaid recipient.

Njoku’s license to practice was revoked last year.