Question: The patient sees primary OB to check on their follicles, as they are trying to conceive naturally. The ob-gyn performs transvaginal ultrasound. Is the correct CPT庐 code 76830 or 76857? Also, which ICD-10-CM code should I use? 星空入口Forum Subscriber Answer: The descriptors for 76830 (Ultrasound, transvaginal) and 76857 (Ultrasound, pelvic (nonobstetric), real time with image documentation; limited or follow-up (eg, for follicles)) should clearly lead you to the correct code, as you state the procedure is a 鈥渢ransvaginal ultrasound.鈥 Regarding the ICD-10-CM, you would code whatever reason the specific patient is having the scan, or findings of the scan. Possible examples include N83.11 (Corpus luteum cyst of right ovary), N97.1 (Female infertility of tubal origin), R10.2 (Pelvic and perineal pain), or even Z31.69 (Encounter for other general counseling and advice on procreation) in some cases.