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

Dr. William R. Ludwig, MD

Individual provider Internal Medicine Physician · NPI 1952390627

Dr. William R. Ludwig, MD is an Internal Medicine Physician in Seattle, Washington. Licensed in Washington. Registered with an NPI since 2005.

Licensed in
WA
In the registry since
2005
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

1200 12th Ave S
Seattle, WA 98144-2712
Phone: (206) 326-2400
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD00014721 (WA)

Record details

NPI number1952390627
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 17, 2005
Last updated in NPPESJune 16, 2021
Certification dateJune 16, 2021

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