Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MS. HELEN S MCNICHOLAS R.N., C.S., F.N.P.
NPI 1598763989
Nurse Practitioner - Family in Mesa, AZ

Q: What is Helen Mcnicholas's NPI number?

The NPI number for Helen Mcnicholas is 1598763989. It was assigned to this individual provider in the NPPES registry on July 11, 2005.

Q: What is Helen Mcnicholas's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Q: When was this NPI record last updated?

The NPPES record for Helen Mcnicholas was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 54 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since July 11, 2005

8307 E NEVILLE AVE, MESA, AZ 85208(480) 984-2863 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: Jul 13, 2026, Sep 11, 2025 (2 updates tracked since 2025).

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About Ms. Helen S Mcnicholas R.n., C.s., F.n.p. NPPES

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

MS. HELEN S MCNICHOLAS R.N., C.S., F.N.P. (NPI 1598763989) is an individual family provider in Mesa, Arizona, licensed in Arizona (RN099009) and active in the NPI registry since July 2005.

NPPES Registry Identity

NPI1598763989

Entity TypeIndividualFemale

Primary Taxonomy363LF0000X

Provider Legal NameMS. HELEN S MCNICHOLASCredential: R.N., C.S., F.N.P.

Location Address8307 E NEVILLE AVEMesa, AZ 85208-6730

Mailing Address8307 E Neville AveMesa, AZ 85208-6730 · (480) 984-2863

Phone(480) 984-2863

Sole ProprietorNo

Enumeration DateJuly 11, 2005

Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration

✔ NPI 1598763989 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LF0000X

License✔ Licensed in AZ · RN099009

Also ListedCounselor · Mental HealthTaxonomy 101YM0800X · License RN099009 (AZ)

8307 E NEVILLE AVE, Mesa, AZ 85208

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Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Helen Mcnicholas's NPI number?

The NPI number for Helen Mcnicholas is 1598763989. It was assigned to this individual provider in the NPPES registry on July 11, 2005.

Where is Helen Mcnicholas located?

Helen Mcnicholas practices at 8307 E Neville Ave, Mesa, AZ 85208. The listed phone number is (480) 984-2863.

What is Helen Mcnicholas's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

When was this NPI record last updated?

The NPPES record for Helen Mcnicholas was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 54 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.