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

Marissa Alexandra Duncan, LPC

Individual provider Professional Counselor · NPI 1134995152

Marissa Alexandra Duncan, LPC is a Mental Health Counselor in Port Washington, Wisconsin. Qualified in 2022, 4 years ago. Practices with Cornerstone Counseling Services Inc, a 328-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
4
Licensed in
WI
In the registry since
2023
What do these letters mean?
LPC — Licensed Professional Counselor
A licensed mental health counsellor.

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Practice location Address checks out

1317 W Grand Ave Ste 6
Port Washington, WI 53074-2075
Phone: (262) 427-8905
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2727 N Grandview Blvd Ste 203, Waukesha, WI 53188-1671 — (262) 547-5567

Specialties & licences

Professional Counselor (primary) Taxonomy 101YP2500X · Licence 11237-125 (WI)

Record details

NPI number1134995152
Entity typeIndividual (Type 1)
GenderFemale
Credentials LPC
Sole proprietorNo
NPI enumeratedNovember 30, 2023
Last updated in NPPESSeptember 15, 2025
Certification dateSeptember 15, 2025

Medicare enrollment

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

Medicare specialtyMENTAL HEALTH COUNSELOR
Medical schoolOTHER
Graduated 2022 (4 years in practice)
Group practice Cornerstone Counseling Services Inc — 328 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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