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

William C Lillydahl, MD

Individual provider Otolaryngology Physician · NPI 1770568982

William C Lillydahl, MD is an Otolaryngology Physician in Boulder, Colorado. Licensed in Colorado. Registered with an NPI since 2005.

Licensed in
CO
In the registry since
2005
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

2750 Broadway St
Boulder, CO 80304-3573
Phone: (303) 440-3000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Otolaryngology Physician (primary) Taxonomy 207Y00000X · Licence 20786 (CO)

Record details

NPI number1770568982
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 9, 2005
Last updated in NPPESOctober 31, 2012
Mailing address2750 Broadway St, Boulder, CO 80304-3573

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