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Harris Histology Services

Clinical Medical Laboratory in Tustin, CA · enumerated 2005 · authorized official Rick Harris, Owner/Chief Histotech.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1003810409

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Registry record

Entity type Organization (Type 2)
Legal business name Harris Histology Services
Practice address 630 S B St, Tustin, CA, 92780
Phone (714) 832-4041
Fax (714) 832-4127
Enumeration date Jun 13, 2005
Last updated in NPPES Aug 22, 2020

Taxonomy & classification

291U00000X Clinical Medical Laboratory Laboratories · License HT-009490 (CA) Primary

Authorized official

Name Rick Harris
Title Owner/Chief Histotech
Phone (714) 832-4041

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What type of organization is Harris Histology Services?
Harris Histology Services is registered in NPPES as a Clinical Medical Laboratory (its primary provider taxonomy).
What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.