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

Individual provider Clinical Social Worker · NPI 1447888946

Mr. Mark J Niezgoda, LICSW is a Clinical Social Worker in Seattle, Washington. Qualified in 1993, 33 years ago. Practices with Renton Counseling Center PLLC, a 6-clinician group and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
33
Licensed in
WA
In the registry since
2020
What do these letters mean?
LICSW — Licensed Independent Clinical Social Worker
The title some states use for an independently practising clinical social worker.

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Practice location Address checks out

4219 S Othello St Apt 517
Seattle, WA 98118-3886
Phone: (206) 321-3997
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence LW60991792 (WA)

Record details

NPI number1447888946
Entity typeIndividual (Type 1)
GenderMale
Credentials LICSW
Sole proprietorYes
NPI enumeratedMarch 30, 2020
Last updated in NPPESMarch 30, 2020
Certification dateMarch 30, 2020

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolOTHER
Graduated 1993 (33 years in practice)
Group practice Renton Counseling Center Pllc — 6 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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