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

Dr. William Roy Welder, MD

Individual provider Family Medicine Physician · NPI 1679593214

Dr. William Roy Welder, MD is a Family Medicine Physician in Great Lakes, Illinois. Practices as a sole proprietor. Licensed in Illinois.

Licensed in
IL
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

3420 Illinois St
Great Lakes, IL 60088-3120
Phone: (847) 688-6755
Fax: (847) 688-2722
Show map & directions

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

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X (IL)

Record details

NPI number1679593214
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 19, 2006
Last updated in NPPESJuly 8, 2007
Mailing address1277 Queen Ann Ln, Gurnee, IL 60031-1932

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