Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Keystone Psychological Group, LLC

Psychiatry Physician in Livingston, NJ · enumerated 2013 · authorized official Christine Macmillan, Medical Director.

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

National Provider Identifier

1942642095

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Registry record

Entity type Organization (Type 2)

Legal business name Keystone Psychological Group, LLC

Other name <Unavail>

Practice address 315 E Northfield Rd, Suite 3a, Livingston, NJ, 07039

Phone (917) 549-0215

Enumeration date Jul 17, 2013

Last updated in NPPES Jul 17, 2013

Taxonomy & classification

101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License 37PC00038100 (NJ) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 44SC00138300 (NJ) Secondary

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 37FI00160600 (NJ) Secondary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 25MA07642800 (NJ) Primary

Authorized official

Name Christine Macmillan

Title Medical Director

Phone (917) 549-0215

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2013-07-17. Verify at npiregistry.cms.hhs.gov.

Where is Keystone Psychological Group, LLC located?

The practice location on file with NPPES is in Livingston, NJ.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-07-17.