During the course of treatment, a medical technician, Kristopher Kahl, 22, made inappropriate sexual contact with the patient's intimate parts on November 4 at approximately 11:40 a.m. in Shirley.
Kahl was working for the Mastic Ambulance Company at the time of the incident.
Following an investigation by Seventh Squad detectives, Kahl, of Middle Island, was arrested Wednesday and charged with Sexual Abuse 3rd Degree.
Kahl was released on stationhouse bail.
He will be arraigned at First District Court in Central Islip on a future date.
Detectives are asking anyone that may have information about this crime to call Seventh Squad at 631-852-8752 or call Crime Stoppers at 1-800-220-TIPS.