This is true. This article references a study published in PLOS Digital Health, an online journal that compiles research related to healthcare. The study demonstrates how ChatGPT can achieve scores "at or near the passing threshold for all three exams" of the USMLE, an exam physicians with an MD must pass to receive their license. Here is the abstract of the article posted for this study:
"We evaluated the performance of a large language model called ChatGPT on the United States Medical Licensing Exam (USMLE), which consists of three exams: Step 1, Step 2CK, and Step 3. ChatGPT performed at or near the passing threshold for all three exams without any specialized training or reinforcement. Additionally, ChatGPT demonstrated a high level of concordance and insight in its explanations. These results suggest that large language models may have the potential to assist with medical education, and potentially, clinical decision-making."
Link to Study: https://journals.plos.org/digitalhealth/article?id=10.1371/journal.pdig.0000198