Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Michael William Marks, PH.D.

Clinical Psychologist in Tucson, AZ · enumerated 2006.

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

National Provider Identifier

1366559221

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael William Marks

Credential PH.D.

Sex Male

Practice address Savahcs, 3601 S. 6th Ave., Tucson, AZ, 85723

Phone (520) 792-1450

Fax (520) 629-1864

Enumeration date Aug 24, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 3668 (AZ) Primary

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Michael Marks?

Michael Marks is registered in NPPES with the primary taxonomy of Clinical Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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John Kettelle Surgery Physician · Tucson, AZ NPI 1598783607 Barbara Palmer Women's Health Nurse Practitioner · Tucson, AZ NPI 1194746750 Julie Ewing Clinical Psychologist · Tucson, AZ NPI 1932212842 Martin Twohill Clinical Social Worker · Tucson, AZ NPI 1043323983 Patricia Haynes Clinical Psychologist · Tucson, AZ NPI 1740385897 Anthony Stazzone Internal Medicine Physician · Tucson, AZ NPI 1740386804 Frank Ambrose Social Worker · Tucson, AZ NPI 1083006993 Virginia Boyd Registered Respiratory Therapist · Tucson, AZ NPI 1700306685

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