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

Shirley (Duffy) Mxmahon, PHD

Individual provider Health Service Psychologist · NPI 1114526159

Shirley (Duffy) Mxmahon, PHD is a Health Service Psychologist in Mesa, Arizona. Practices as a sole proprietor. Registered with an NPI since 2020.

In the registry since
2020
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

See every abbreviation used in this directory →

Practice location Address checks out

4555 E Inverness Ave Bldg 3
Mesa, AZ 85206-4630
Phone: (480) 830-3900
Fax: (480) 830-3901
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Health Service Psychologist (primary) Taxonomy 103TH0100X

Record details

NPI number1114526159
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD
Sole proprietorYes
NPI enumeratedOctober 21, 2020
Last updated in NPPESNovember 27, 2023
Certification dateOctober 20, 2020

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