Patients with RA-ILD

Assessments include:~* Clinical: height, weight, oxygen saturation at rest, and 6-minute walk test.~* Rheumatological: study Rheumatologist will document rheumatoid arthritis symptoms and clinical findings at baseline and follow-up.~* Pulmonary Function Testing: data will be collected from clinically performed spirometry and diffusing capacity for carbon monoxide.~* High-resolution computed tomography (HRCT) imaging: HRCT scans will be collected at baseline and 12 months in line with standard of care for treatment of RA-ILD.~* Lab specimens: peripheral blood will be obtained for DNA, RNA, serum, and plasma at baseline and at 12 months for all sites or every 3-4 months in Colorado. Buccal swabs (cheek) will also be collected once each year.~* Information collected: will include demographics, co-morbidities, disease history, medication history, pulmonary function, radiographic imaging, and transplant/survival status through questionnaires and medical chart review.