What is Holly Gruber's NPI number?

Holly Gruber's National Provider Identifier (NPI) is 1639967433, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Holly Gruber's specialty?

Holly Gruber is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).

Where is Holly Gruber located?

Holly Gruber's practice location on file with NPPES is 341 E Main St, Northville, MI 48167-1623.

What is Holly Gruber's phone number?

The practice phone number listed in the NPPES registry for Holly Gruber is (734) 215-5176.

Is Holly Gruber's NPI active?

Yes — Holly Gruber's NPI (1639967433) is active in the NPPES registry as of the last update on 2025-04-30.

IndividualActive

Holly Gruber

NPI 1639967433 · Mental Health Counselor · Northville, MI

Holly Gruber is a Mental Health Counselor provider in Northville, MI (NPI 1639967433).

Provider details

NPI number: 1639967433
Entity type: Individual
Primary specialty: Mental Health CounselorBehavioral Health & Social Service Providers
Sex: Female
Sole proprietor: No
License: 6401225128 (MI)

Specialties & taxonomies

Mental Health CounselorPrimary101YM0800XLicense 6401225128 (MI)
Behavioral Health & Social Service Providers

Profile Score

Established profile(54/100 index)

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

Registry tenure38% of score
1 yr in NPPES 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

341 E Main St

Northville, MI 48167-1623

Phone: (734) 215-5176

Street-level locationGet directions

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Mailing address