Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Alexandra Haley Mackenzie, APRN, PMHNP-BC

Individual provider Psychiatric/Mental Health Nurse Practitioner · NPI 1164256376

Alexandra Haley Mackenzie, APRN, PMHNP-BC is a Nurse Practitioner in Johnston, Rhode Island. Qualified in 2024, 2 years ago. Practices with Gateway Healthcare Inc, a 64-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Rhode Island.

Years since qualifying
2
Licensed in
RI
In the registry since
2024
Specialties on file
2
What do these letters mean?
APRN — Advanced Practice Registered Nurse
The umbrella licence covering nurse practitioners, midwives, anaesthetists and clinical nurse specialists.
PMHNP-BC — Psychiatric-Mental Health Nurse Practitioner, Board Certified
A board-certified psychiatric nurse practitioner.

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Practice location Address checks out

1443 Hartford Ave
Johnston, RI 02919-3224
Phone: (401) 273-8100
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1445 Wampanoag Trl Unit 202, Riverside, RI 02915-1019 — (401) 437-4116

Specialties & licences

Psychiatric/Mental Health Nurse Practitioner (primary) Taxonomy 363LP0808X · Licence APRN04583 (RI)
Registered Nurse Taxonomy 163W00000X · Licence RN62588 (RI)

Record details

NPI number1164256376
Entity typeIndividual (Type 1)
GenderFemale
Credentials APRN , PMHNP-BC
Sole proprietorNo
NPI enumeratedAugust 29, 2024
Last updated in NPPESDecember 9, 2025
Certification dateDecember 9, 2025

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2024 (2 years in practice)
Group practice Gateway Healthcare Inc — 64 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $51 2 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Colleagues at Gateway Healthcare Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 64 clinicians in the practice; 12 are shown here.

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