Dr. Douglas CohenMD
Internal Medicine
at Douglas E. Cohen, MD Internal Medicine Primary Care — Mill Valley, CA
About
Dr. Douglas Cohen grew up in New York and completed his undergraduate degree at Cornell University, earning a Bachelor of Science with Honors and Distinction in 1987. He then earned his MD from New York University School of Medicine in 1991. He moved to California to complete his Internal Medicine residency at UCSF in 1994, where he earned his board certification from the American Board of Internal Medicine.
After residency, Dr. Cohen practiced in primary care, urgent care, and travel medicine before shifting his focus to Hospital Medicine in Marin. Over nearly two decades, he held leadership roles including Hospitalist Medical Director and Chief of Staff at MarinHealth during the pandemic years of 2020 and 2021. In those roles, he led initiatives that improved healthcare quality and patient safety at MarinHealth. He holds fellowship designations from both the American College of Physicians and the Society of Hospital Medicine. In 2024, he returned to primary care to apply everything he had learned about complex illness and human health. Outside the office, Dr. Cohen enjoys time with his wife and three children, playing pickleball, backgammon, cards, and skiing. He also photographs the landscapes of Marin and beyond using a Fujifilm camera.
Education & Training
Undergraduate
Cornell University, Bachelor of Science, Honors and Distinction, 1987
Medical School
New York University School of Medicine, Doctor of Medicine, 1991
Residency
Internal Medicine, University of California, San Francisco (UCSF), 1994
Additional Training
Fellow of the American College of Physicians; Fellow in Hospital Medicine, Society of Hospital Medicine
Certifications
Conditions Treated
Who is Dr. Cohen right for?
Dr. Cohen is a strong fit for adults seeking a thorough, relationship-driven approach to primary care. Patients managing complex or chronic medical conditions benefit from his nearly two decades of hospital medicine experience. He works well with adults who want a physician who coordinates directly with their specialists and hospital team. Patients who value same-day access and unhurried appointments find his practice style well-suited to their needs.
Similar Doctors Nearby
Dr. Jane M. HightowerMD
preventive care needs, chronic conditions, pediatric health +2 more
Dr. Tiffany LyMD
Internal medicine conditions, Chronic disease management, Preventive health
Dr. Annette van der HoevenMD
Internal medicine conditions, Primary care conditions, Chronic disease management +1 more
Frequently Asked Questions
Dr. Cohen manages a wide range of adult medical conditions, from routine primary care to complex illness. His background in hospital medicine gives him deep experience with multisystem conditions. He also emphasizes wellness care and preventive screening as part of ongoing patient management.
Yes, Dr. Cohen holds board certification from the American Board of Internal Medicine since 1994. He maintains that certification currently. He also holds fellowship designations from the American College of Physicians and the Society of Hospital Medicine.
Dr. Cohen earned his undergraduate degree at Cornell University and his MD at New York University School of Medicine. He completed his Internal Medicine residency at the University of California, San Francisco in 1994.
Dr. Cohen served as Hospitalist Medical Director and as Chief of Staff at MarinHealth during the pandemic in 2020 and 2021. In those roles, he led efforts that improved healthcare quality and patient safety at the medical center.
Dr. Cohen coordinates directly with specialists on a physician-to-physician basis. He personally communicates with your specialist team rather than leaving patients to navigate referrals alone. This direct coordination helps ensure continuity across your care.
Yes. If a member is hospitalized in Marin, Dr. Cohen communicates directly with the treating hospital physician. He also offers hospital visits in Marin when needed.
After nearly 20 years in hospital medicine, Dr. Cohen wanted to apply his clinical knowledge in a setting built around ongoing patient relationships. He returned to primary care in 2024 to help patients improve their health, maintain wellness, and lead fuller lives.
Dr. Cohen has lived and practiced in Marin for nearly 20 years. He built lasting relationships with local physicians and the broader Marin County community during his time in hospital medicine before opening his concierge practice.
Doctor profile last updated June 8, 2026