A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).
Learn more about Dr. Timmothy Merrigan:
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- Currently 3 of 4 stars
The overall average patient rating of Dr. Timmothy Merrigan is Good.
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Specialties & Research
Dr. Timmothy Merrigan, MD is board certified in Family Medicine.
- He has special expertise in 1 area:
- Flu (Human Influenza)
Education & Awards
Dr. Merrigan graduated from Medical College of Wisconsin, Milwaukee.
Dr. Merrigan has 3 hospital affiliations:
- John Muir Medical Center, Walnut Creek Campus
- John Muir Med Center Walnut Creek Campus
- Family & Community Medicine
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- Additional Information
- Where does Dr. Timmothy O. Merrigan practice?
Dr. Timmothy Merrigan practices Family Medicine near Walnut Creek, CA.
See Walnut Creek Family Physicians.