Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark Arnold Carpenter, PSY.D.

Addiction (Substance Use Disorder) Counselor in Easton, MD · enumerated 2008.

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

National Provider Identifier

1043474059

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark Arnold Carpenter

Credential PSY.D.

Sex Male

Practice address 301 Bay St Ste 307, Easton, MD, 21601

Phone (410) 819-5915

Fax (410) 819-0591

Enumeration date Jul 18, 2008

Last updated in NPPES Jul 18, 2008

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 02305 (MD) Primary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 02305 (MD) Secondary

PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD 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 Mark Carpenter?

Mark Carpenter is registered in NPPES with the primary taxonomy of Addiction (Substance Use Disorder) Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-07-18.