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Douglas Gregory Pierson, LMFT

Marriage & Family Therapist in Costa Mesa, CA · enumerated 2019.

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

National Provider Identifier

1144876756

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Registry record

Entity type Individual (Type 1)
Name Douglas Gregory Pierson
Credential LMFT
Sex Male
Practice address Costa Mesa, CA, 92627
Phone (714) 746-7499
Enumeration date Aug 11, 2019
Last updated in NPPES Aug 11, 2019

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 98775 (CA) Primary
LMFT · Licensed Marriage and Family Therapist: A licensed therapist specializing in relational and family psychotherapy. About the LMFT credential

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 is the NPI number for Douglas Pierson?
The National Provider Identifier (NPI) for Douglas Pierson is 1144876756, a Type 1 (individual) record in the CMS NPPES registry.
Where does Douglas Pierson practice?
The practice location on file with NPPES is in Costa Mesa, CA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-08-11.