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

MS. Mercy Wendy Muthoni, PMHNP

Individual provider Psychiatric/Mental Health Nurse Practitioner · NPI 1922693480

MS. Mercy Wendy Muthoni, PMHNP is a Psychiatric/Mental Health Nurse Practitioner in Laveen, Arizona. Practices as a sole proprietor. Licensed in Arizona.

Licensed in
AZ
In the registry since
2021
What do these letters mean?
PMHNP — Psychiatric-Mental Health Nurse Practitioner
A nurse practitioner specialising in mental health, able to prescribe psychiatric medication.

See every abbreviation used in this directory →

Practice location Address checks out

8509 S 41st Dr
Laveen, AZ 85339-7823
Phone: (858) 344-4746
Fax: (520) 455-3200
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 328712 (AZ)

Record details

NPI number1922693480
Entity typeIndividual (Type 1)
GenderFemale
Credentials PMHNP
Sole proprietorYes
NPI enumeratedMarch 6, 2021
Last updated in NPPESSeptember 3, 2025
Certification dateSeptember 3, 2025

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