What is Kollin Grunberg's NPI number?

Kollin Grunberg's National Provider Identifier (NPI) is 1699648048, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Kollin Grunberg's specialty?

Kollin Grunberg is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).

Where is Kollin Grunberg located?

Kollin Grunberg's practice location on file with NPPES is 4610 X St, Sacramento, CA 95817-2200.

What is Kollin Grunberg's phone number?

The practice phone number listed in the NPPES registry for Kollin Grunberg is (916) 734-2011.

Is Kollin Grunberg's NPI active?

Yes — Kollin Grunberg's NPI (1699648048) is active in the NPPES registry as of the last update on 2025-09-24.

IndividualActive

Kollin Grunberg

NPI 1699648048 · Specialist · Sacramento, CA

Kollin Grunberg is a Specialist provider in Sacramento, CA (NPI 1699648048).

Provider details

NPI number: 1699648048
Entity type: Individual
Primary specialty: SpecialistOther Service Providers
Sex: Male
Sole proprietor: No

Specialties & taxonomies

SpecialistPrimary174400000X
Other Service Providers
Student in an Organized Health Care Education/Training Program390200000X
Student, Health Care

Profile Score

Basic profile(47/100 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
83% 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

4610 X St

Sacramento, CA 95817-2200

Phone: (916) 734-2011

Street-level locationGet directions

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Mailing address