[stephen r wells md | best obstetrician walnut creek ca | 120 la casa via #208, walnut creek, ca 94598, usa welcome to stephen r wells md! our team of leading obgyn professionals are dedicated to providing our patients a more comprehensive, and personalized experience through our small group of physicians, certified nurse midwives, and certified nurse practitioners who work together in a shared workspace to deliver the highest quality of care. delivering babies exclusively at john muir medical center.]