Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. David Preston Mackinnon, PH.D.

Marriage & Family Therapist in Hinsdale, IL · enumerated 2006 · practices at Lighthouse Counseling Services LLC.

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

National Provider Identifier

1336156744

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Registry record

Entity type Individual (Type 1)

Name Dr. David Preston Mackinnon

Credential PH.D.

Sex Male

Practice address Hinsdale, IL, 60521

Phone (630) 325-4770

Fax (630) 325-4663

Enumeration date Aug 1, 2006

Last updated in NPPES Jul 8, 2007

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 Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Other identifiers

Identifier	Type	State	Issuer
0002232831	Other	IL	BLUE CROSS/BLUE SHIELD ID

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 is the NPI number for David Mackinnon?

The National Provider Identifier (NPI) for David Mackinnon is 1336156744, a Type 1 (individual) record in the CMS NPPES registry.

Where does David Mackinnon practice?

The practice location on file with NPPES is in Hinsdale, IL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Lighthouse Counseling Services LLC Clinical Psychologist · Hinsdale, IL NPI 1104129287

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.