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

Dr. John Ernest Ludwigsen, DDS

Individual provider Dentist · NPI 1669540589

Dr. John Ernest Ludwigsen, DDS is a Dentist in Sister Bay, Wisconsin. Licensed in Wisconsin. Registered with an NPI since 2006.

Licensed in
WI
In the registry since
2006
What do these letters mean?
DDS — Doctor of Dental Surgery
A dentist. DDS and DMD are the same qualification — universities choose which title to award.

See every abbreviation used in this directory →

Practice location Address checks out

940 S Bayshore Dr
Sister Bay, WI 54234-9309
Phone: (920) 854-6556
Fax: (920) 854-6559
Show map & directions

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

Specialties & licences

Dentist (primary) Taxonomy 122300000X · Licence 5084015 (WI)

Record details

NPI number1669540589
Entity typeIndividual (Type 1)
GenderMale
Credentials DDS
Sole proprietorNo
NPI enumeratedNovember 30, 2006
Last updated in NPPESJuly 8, 2007
Mailing address940 South Bayshore Drive, Sister Bay, WI 54234-9309

Other providers in Sister Bay