ALEXANDRA HALEY MACKENZIE APRN, PMHNP-BC
NPI 1164256376
Nurse Practitioner - Psychiatric/Mental Health in Johnston, RI

Q: What is Alexandra Mackenzie's NPI number?

The NPI number for Alexandra Mackenzie is 1164256376. It was assigned to this individual provider in the NPPES registry on August 29, 2024.

Q: What is Alexandra Mackenzie's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

Active since August 29, 2024PECOS EnrolledAccepts Medicare Assignment

1443 HARTFORD AVE, JOHNSTON, RI 02919(401) 273-8100 Get Directions Write a Review

NPPES record last updated: December 9, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

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About Alexandra Haley Mackenzie Aprn, Pmhnp-bc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ALEXANDRA HALEY MACKENZIE APRN, PMHNP-BC (NPI 1164256376) is an individual psychiatric/mental health provider in Johnston, Rhode Island, licensed in Rhode Island (APRN04583) and active in the NPI registry since August 2024. She is enrolled in Medicare PECOS, maintains a secondary practice location in Riverside, and is a graduate of Other (2024).

NPPES Registry Identity

NPI1164256376

Entity TypeIndividualFemale

Primary Taxonomy363LP0808X

Provider Legal NameALEXANDRA HALEY MACKENZIECredential: APRN, PMHNP-BC

Location Address1443 HARTFORD AVEJohnston, RI 02919-3224

Mailing Address15 La Salle SqProvidence, RI 02903-1814 · (401) 444-6779 · Fax (401) 444-6912

Phone(401) 273-8100

Sole ProprietorNo

Medical School CMSOtherGraduated 2024

Enumeration DateAugust 29, 2024

Last NPPES UpdateDecember 9, 2025

NPPES CertifiedDecember 9, 2025

✔ NPI 1164256376 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LP0808X

License✔ Licensed in RI · APRN04583

Also ListedRegistered NurseTaxonomy 163W00000X · License RN62588 (RI)

1443 HARTFORD AVE, Johnston, RI 02919

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Secondary Practice Location 1

Location 11445 Wampanoag Trl Unit 202Riverside, RI 02915-1019 · Phone (401) 437-4116

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Harvard Pilgrim Health Care.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Alexandra Haley Mackenzie Aprn, Pmhnp-bc is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3375029119

PECOS Enrollment IDI20260112000505

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Alexandra Mackenzie reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Gateway Healthcare Inc

7.6 mi

Mental Health (Including Community Mental Health Center)

101-103 BACON ST
Pawtucket, RI 02860

Reassigned Medicare billing, Rhode Island enrollment
150 clinicians in this Medicare group

NPI 1821078932 (401) 722-3560

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02919 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$90.48 typical visit price

range $58.57 – $177.03

Typical copayment $22.62 (range $14.64 – $44.25)

Most-billed visit code 99203

Established Patient

$103.10 typical visit price

range $18.92 – $144.38

Typical copayment $25.77 (range $4.73 – $36.09)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SANTANNA ROCHA J.D., M.S.W., LCSW

Social Worker (Clinical)