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Castle Biosciences, Inc

Clinical Medical Laboratory in Phoenix, AZ · enumerated 2008 · authorized official Derek Maetzold, Ceo.

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

National Provider Identifier

1770734253

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Registry record

Entity type Organization (Type 2)
Legal business name Castle Biosciences, Inc
Practice address 3737 N 7th St, Suite 160, Phoenix, AZ, 85014
Phone (281) 796-9032
Fax (866) 431-2924
Enumeration date Oct 2, 2008
Last updated in NPPES Mar 11, 2024

Taxonomy & classification

291U00000X Clinical Medical Laboratory Laboratories Primary

Authorized official

Name Derek Maetzold
Title Ceo
Phone (281) 796-9032

Other identifiers

Identifier Type State Issuer
7100731920 Medicaid KY -
30004741190001 Medicaid KS -

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 Castle Biosciences, Inc?
Castle Biosciences, Inc 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 2024-03-11.