Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Merl W O'Brien, MD

Individual provider Emergency Medicine Physician · NPI 1386687317

Dr. Merl W O'Brien, MD is an Emergency Medicine Physician in Carmichael, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

4156 Manzanita Ave Ste 100
Carmichael, CA 95608-1726
Phone: (916) 483-5400
Fax: (916) 483-1937
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence G34781 (CA)

Record details

NPI number1386687317
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 14, 2006
Last updated in NPPESJuly 8, 2007

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