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

Leslie J Klaff, MD

Individual provider Endocrinology, Diabetes & Metabolism Physician · NPI 1720009764

Leslie J Klaff, MD is an Endocrinology, Diabetes & Metabolism Physician in Renton, Washington. Licensed in Washington. Registered with an NPI since 2006.

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

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Practice location Address checks out

723 SW 10th St #100
Renton, WA 98057
Phone: (425) 251-1720
Fax: (425) 251-1723
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Endocrinology, Diabetes & Metabolism Physician (primary) Taxonomy 207RE0101X · Licence MD00021403 (WA)

Record details

NPI number1720009764
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 23, 2006
Last updated in NPPESJuly 8, 2007
Mailing address723 Sw 10th St, 100, Renton, WA 98057

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