Objectives: How physicians communicate can impact patient perceptions and health outcomes. Analyzing physician self-descriptions and language patterns can indicate their general psychological functioning and identify words that link to patient evaluations. To determine how the language patterns of physicians link to and affect patient evaluations, a field study using physician profiles from HealthGrades.com and a mixed design experiment were conducted.Setting: A large field study (N = 54,420 online profiles) analyzed physician self-descriptions and biographies, as a proxy for their general communication style and psychological makeup, in search of language patterns that associate with ratings by patients. Automated text analyses were performed (Study 1) and a mixed design experiment in Study 2 evaluated how language patterns change patient perceptions of physicians.Participants: Study 1 included 54,420 online profiles from HealthGrades, and Study 2 included 500 participants recruited from CloudResearch.Primary and secondary outcome measures: Automated text analyses in Study 1 evaluated how rates of common words, analytic thinking, self-references, emotion terms, and verbal confident related to a physician’s star rating on HealthGrades. The experiment in Study 2 evaluated how language differences associated with self-references and verbal confidence affected star rating, warmth, and competence perceptions.Results: In Study 1, physicians who communicate in a self-focused and certain manner tend to have higher overall ratings online. Those who discuss their expertise and compassion for patients are also rated more favorably. In Study 2, participants who read physician profiles with high rates of self-references and certainty terms rated doctors more favorably (e.g., warmer, more competent) than those who read physician profiles with low rates of self-references and certainty terms.Conclusions: Words are critical indicators of physicians’ psychological functioning and can change patient evaluations. Future research is needed to identify why certain patients might review physicians online and the mechanisms underlying changes in perceptions