William Chapin

William C Chapin, MD

Endocrinology, Internal Medicine
Office Phone: 503-255-3404

Clinical Interests

Diabetes, Thyroid Disease, Pituitary Disease, Adrenal Disease


Most major health plans accepted

Education and Training

Prof. Education:

Drexel University College of Medicine, Philadelphia pA


Oregon Health & Science University School of Medicine, Portland OR


Oregon Health & Science University School of Medicine, Portland OR

Additional Certification

Internal Medicine

Locations and Directions

10101 SE Main St.
Suite 1001
Portland, OR 97216 503-255-3404 Fax - 503-255-4750
19255 SW 65th Ave
Suite 110
Tualatin, OR 97062 503-255-3404 Fax - 503-255-4750


Dr. William Chapin is a board certified internal medicine physician and board certified endocrinologist.  Dr. Chapin completed both his internal medicine and endocrinology training at Oregon Health Sciences University in Portland.  His passion is to provide patients with the best combination of personalized care and evidence based medicine.

As an endocrinologist, Dr. Chapin cares for and manages treatment for a wide spectrum of endocrine disease with a special interest in thyroid disorders.  He serves as the medical director for Adventist Health Medical Group Endocrine Center. 

Having previously worked as an internal medicine physician to a medically underserved Latino population, Dr. Chapin has a strong dedication to service and outreach.  He is fluent in Spanish and has conversational French skills.

Dr. Chapin lives in Portland with his wife and son.  He is an outdoor enthusiast and avid fly fisherman.

10123 SE Market St, Portland, OR 97216(503) 257-2500