Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Green Leaf, A Psychological Services Corporation

Mental Health Counselor in Orinda, CA · enumerated 2019 · authorized official David Mccollum, Practice Manager.

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

National Provider Identifier

1639715907

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Registry record

Entity type Organization (Type 2)

Legal business name Green Leaf, A Psychological Services Corporation

Practice address 302 Village Sq, Orinda, CA, 94563

Phone (925) 386-6037

Enumeration date Nov 21, 2019

Last updated in NPPES Nov 21, 2019

Taxonomy & classification

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers Primary

103T00000X Psychologist Behavioral Health & Social Service Providers Secondary

103TB0200X Cognitive & Behavioral Psychologist Behavioral Health & Social Service Providers Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers Secondary

103TC2200X Clinical Child & Adolescent Psychologist Behavioral Health & Social Service Providers Secondary

103TF0000X Family Psychologist Behavioral Health & Social Service Providers Secondary

103TS0200X School Psychologist Behavioral Health & Social Service Providers Secondary

104100000X Social Worker Behavioral Health & Social Service Providers Secondary

1041S0200X School Social Worker Behavioral Health & Social Service Providers Secondary

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers Secondary

Authorized official

Name David Mccollum

Title Practice Manager

Phone (925) 386-6037

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What type of organization is Green Leaf, A Psychological Services Corporation?

Green Leaf, A Psychological Services Corporation is registered in NPPES as a Mental Health Counselor (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.

Providers at this address

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Natalie Steffen Psychologist · Orinda, CA NPI 1265624217 Allison Haag Marriage & Family Therapist · Orinda, CA NPI 1558886929 Danielle Morales School Psychologist · Orinda, CA NPI 1992315477 Alissa Cohen Mental Health Counselor · Orinda, CA NPI 1679161970 Madison Genovese Mental Health Counselor · Orinda, CA NPI 1801484837 Rebecca Spalding Marriage & Family Therapist · Orinda, CA NPI 1831866755 Merrielle Chevalblanc Clinical Social Worker · Orinda, CA NPI 1225805021 Kiani Alba Mental Health Counselor · Orinda, CA NPI 1912775354

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-11-21.