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

Individual provider Speech-Language Pathologist · NPI 1700098878

Marilyn Willcoxon, CCC-SLP is a Qualified Speech Language Pathologist in Phoenix, Arizona. Qualified in 2000, 26 years ago. Practices with Therapy One PLLC, a 6-clinician group and works from 2 locations. Licensed in Arizona.

Years since qualifying
26
Licensed in
AZ
In the registry since
2007
What do these letters mean?
CCC-SLP — Certificate of Clinical Competence in Speech-Language Pathology
A speech-language pathologist certified by ASHA.

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Practice location Address checks out

2850 N 24th St
Phoenix, AZ 85008-1004
Phone: (602) 266-5976
Fax: (602) 274-8952
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 108 W University Dr, Mesa, AZ 85201-5818 — (480) 668-1917

Specialties & licences

Speech-Language Pathologist (primary) Taxonomy 235Z00000X · Licence SLP1800 (AZ)

Record details

NPI number1700098878
Entity typeIndividual (Type 1)
GenderFemale
Credentials CCC-SLP
Sole proprietorNo
NPI enumeratedMay 3, 2007
Last updated in NPPESMarch 25, 2025
Certification dateMarch 25, 2025
Mailing address2850 N 24th St, Phoenix, AZ 85008-1004

Medicare enrollment

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

Medicare specialtyQUALIFIED SPEECH LANGUAGE PATHOLOGIST
Medical schoolOTHER
Graduated 2000 (26 years in practice)
Group practice Therapy One Pllc — 6 clinicians
Accepts Medicare assignment Not indicated

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