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

Niels William Nielsen, LISW

Individual provider Counselor · NPI 1013040963

Niels William Nielsen, LISW is a Counselor in Willoughby, Ohio. Licensed in Ohio. Registered with an NPI since 2007.

Licensed in
OH
In the registry since
2007
Specialties on file
3
What do these letters mean?
LISW — Licensed Independent Social Worker
A social worker licensed to practise independently.

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Practice location Address checks out

38879 Mentor Ave Ste C
Willoughby, OH 44094-7992
Phone: (440) 953-9999
Fax: (440) 918-3839
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Social Worker (primary) Taxonomy 104100000X · Licence I2504 (OH)
Counselor Taxonomy 101Y00000X · Licence I2504 (OH)
Clinical Social Worker Taxonomy 1041C0700X · Licence I2504 (OH)

Record details

NPI number1013040963
Entity typeIndividual (Type 1)
GenderMale
Credentials LISW
Sole proprietorNo
NPI enumeratedMarch 13, 2007
Last updated in NPPESSeptember 11, 2025

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