What is Holly Mackay's NPI number?

Holly Mackay's National Provider Identifier (NPI) is 1134075906, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Holly Mackay's specialty?

Holly Mackay is listed in the NPPES registry with a primary specialty of Registered Nurse (Nursing Service Providers).

Where is Holly Mackay located?

Holly Mackay's practice location on file with NPPES is 5451 Hampton Pl, Saginaw, MI 48604-9284.

What is Holly Mackay's phone number?

The practice phone number listed in the NPPES registry for Holly Mackay is (810) 487-5571.

Is Holly Mackay's NPI active?

Yes — Holly Mackay's NPI (1134075906) is active in the NPPES registry as of the last update on 2026-03-05.

IndividualActive

Holly Mackay

NPI 1134075906 · Registered Nurse · Saginaw, MI

Holly Mackay is a Registered Nurse provider in Saginaw, MI (NPI 1134075906).

Provider details

NPI number: 1134075906
Entity type: Individual
Primary specialty: Registered NurseNursing Service Providers
Sex: Female
Sole proprietor: No
License: 4704336777 (MI)

Specialties & taxonomies

Registered NursePrimary163W00000XLicense 4704336777 (MI)
Nursing Service Providers

Profile Score

Established profile(53/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
Under 1 yr in registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
1 documented practice location

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

5451 Hampton Pl

Saginaw, MI 48604-9284

Phone: (810) 487-5571

Street-level locationGet directions

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Mailing address