Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Aaron M. Jacoby, PH.D.

Clinical Psychologist in Baltimore, MD · enumerated 2006.

Data current as of Jul 11, 2026 · sourced from CMS NPPES

National Provider Identifier

1649281866

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Registry record

Entity type Individual (Type 1)

Name Dr. Aaron M. Jacoby

Credential PH.D.

Sex Male

Practice address 10 N Greene St, Baltimore, MD, 21201

Phone (443) 591-4388

Enumeration date Aug 11, 2006

Last updated in NPPES Nov 12, 2024

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 05957 (MD) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Aaron Jacoby?

Aaron Jacoby 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.

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.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2024-11-12.