What is cpt code 41?

CPT codes are always 5 digits. The closest to your question of "41" would be:

41000: INTRAORAL INCISION AND DRAINAGE OF ABSCESS, CYST, OR HEMATOMA OF TONGUE OR FLOOR OF MOUTH; LINGUAL

00410: ANESTHESIA FOR PROCEDURES ON THE INTEGUMENTARY SYSTEM ON THE EXTREMITIES, ANTERIOR TRUNK AND PERINEUM; ELECTRICAL CONVERSION OF ARRHYTHMIAS

Source: American Medical Association (CPT Code Search: https://ocm.ama-assn.org/OCM/CPTRelativeValueSearch.do?submitbutton=accept)