What is Greyson Holliday's NPI number?

Greyson Holliday's National Provider Identifier (NPI) is 1689559213, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Greyson Holliday's specialty?

Greyson Holliday is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).

Where is Greyson Holliday located?

Greyson Holliday's practice location on file with NPPES is 201 W Springfield Ave Ste 211, Champaign, IL 61820-4880.

What is Greyson Holliday's phone number?

The practice phone number listed in the NPPES registry for Greyson Holliday is (217) 621-6180.

Is Greyson Holliday's NPI active?

Yes — Greyson Holliday's NPI (1689559213) is active in the NPPES registry as of the last update on 2025-08-11.

IndividualActive

Greyson Holliday

NPI 1689559213 · Psychologist · Champaign, IL

Greyson Holliday is a Psychologist provider in Champaign, IL (NPI 1689559213).

Provider details

NPI number: 1689559213
Entity type: Individual
Primary specialty: PsychologistBehavioral Health & Social Service Providers
Sex: Male
Sole proprietor: No
License: 071.022314 (IL)

Specialties & taxonomies

PsychologistPrimary103T00000XLicense 071.022314 (IL)
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
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

201 W Springfield Ave Ste 211

Champaign, IL 61820-4880

Phone: (217) 621-6180

Approximate (ZIP-level) locationGet directions

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Mailing address