Dr. Sara J. Johnson is a rheumatologist in Smithtown, New York and is affiliated with multiple hospitals in the area, including St. Catherine of Siena Hospital and St. Charles Hospital. She received her medical degree from Columbia University Vagelos College of Physicians and Surgeons and has been in practice for more than 20 years. Dr. Sara J. Johnson has expertise in treating arthritis, rheumatoid arthritis, among other conditions - see all areas of expertise. Dr. Sara J. Johnson accepts Aetna, Humana - see other insurance plans accepted.