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

William Scott Koenig, APRN

Individual provider Psychiatric/Mental Health Nurse Practitioner · NPI 1548194640

William Scott Koenig, APRN is a Psychiatric/Mental Health Nurse Practitioner in Chehalis, Washington. Practices as a sole proprietor. Licensed in Washington.

Licensed in
WA
In the registry since
2026
What do these letters mean?
APRN — Advanced Practice Registered Nurse
The umbrella licence covering nurse practitioners, midwives, anaesthetists and clinical nurse specialists.

See every abbreviation used in this directory →

Practice location Address checks out

409 S Market Blvd Ste 9
Chehalis, WA 98532-3043
Phone: (360) 827-5362
Show map & directions

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

Specialties & licences

Psychiatric/Mental Health Nurse Practitioner (primary) Taxonomy 363LP0808X · Licence ARNP.AP.70141126-NP (WA)

Record details

NPI number1548194640
Entity typeIndividual (Type 1)
GenderNot disclosed
Credentials APRN
Sole proprietorYes
NPI enumeratedJune 11, 2026
Last updated in NPPESJune 11, 2026
Certification dateJune 11, 2026
Mailing addressPo Box 753, Toledo, WA 98591-0753

Other providers in Chehalis