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

Alexander D. Wielaard, MD

Individual provider Emergency Medicine Physician · NPI 1144438995

Alexander D. Wielaard, MD is an Emergency Medicine Physician in Walnut, California. Practices as a sole proprietor. Licensed in Guam and Maryland.

Licensed in
GU, MD
In the registry since
2007
Specialties on file
2
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

340 S Lemon Ave 9926
Walnut, CA 91789-2706
Phone: (706) 306-4668
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 D0071128 (MD)
Emergency Medicine Physician Taxonomy 207P00000X · Licence M-2007 (GU)

Record details

NPI number1144438995
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 17, 2007
Last updated in NPPESNovember 21, 2016