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

William Nelson Haas III, DC

Individual provider Chiropractor · NPI 1457431389

William Nelson Haas III, DC is a Chiropractor in Denver, Colorado. Licensed in Colorado. Registered with an NPI since 2006.

Licensed in
CO
In the registry since
2006
What do these letters mean?
DC — Doctor of Chiropractic
A licensed chiropractor.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1712 Lafayette St
Denver, CO 80218-1117
Phone: (303) 864-1285
Fax: (303) 864-1215
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Chiropractor (primary) Taxonomy 111N00000X · Licence 4449 (CO)

Record details

NPI number1457431389
Entity typeIndividual (Type 1)
GenderMale
Credentials DC
Sole proprietorNo
NPI enumeratedOctober 16, 2006
Last updated in NPPESJuly 8, 2007

Other providers in Denver