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

Dr. Arthur Seiji Hayashi, MD

Individual provider Family Medicine Physician · NPI 1912069055

Dr. Arthur Seiji Hayashi, MD is a Family Medicine Physician in Washington, District of Columbia. Practices as a sole proprietor. Licensed in District of Columbia.

Licensed in
DC
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

1220 12th St SE Ste 120
Washington, DC 20003-3722
Phone: (202) 715-7900
Show map & directions

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

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence MD33159 (DC)

Record details

NPI number1912069055
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedDecember 14, 2006
Last updated in NPPESAugust 6, 2015

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