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

William A Alto, MD, MPH

Individual provider Family Medicine Physician · NPI 1962478073

William A Alto, MD, MPH is a Family Medicine Physician in Seattle, Washington. Licensed in Maine and Washington. Registered with an NPI since 2006.

Licensed in
ME, WA
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
MPH — Master of Public Health
A graduate degree in population health.

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Practice location Address checks out

550 16th Ave Ste 100
Seattle, WA 98122-5699
Phone: (206) 320-2484
Fax: (206) 320-4568
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Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence MD60240474 (WA)
Family Medicine Physician Taxonomy 207Q00000X · Licence 013896 (ME)

Record details

NPI number1962478073
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , MPH
Sole proprietorNo
NPI enumeratedFebruary 28, 2006
Last updated in NPPESSeptember 7, 2023
Mailing addressPo Box 25608, Salt Lake City, UT 84125-0608

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