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

Dr. Aaron Philip Nelson, PH.D.

Clinical Neuropsychologist in Boston, MA · enumerated 2006.

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

National Provider Identifier

1124096920

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Registry record

Entity type Individual (Type 1)

Name Dr. Aaron Philip Nelson

Credential PH.D.

Sex Male

Practice address Boston, MA, 02115

Phone (617) 732-8060

Fax (617) 738-9122

Enumeration date Mar 9, 2006

Last updated in NPPES Sep 8, 2014

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers · License 3482 (MA) Primary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 3482 (MA) Secondary

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
0514748	Medicaid	MA	-
703415	Other	MA	TUFTS ASSOCIATED HEALTH P
W03606	Other	MA	BLUE CROSS BLUE SHIELD MA
001336	Other	MA	VALUE OPTIONS HEALTH CARE
32259	Other	MA	HARVARD PILGRIM HEALTH CA

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

What specialty is Aaron Nelson?

Aaron Nelson is registered in NPPES with the primary taxonomy of Clinical Neuropsychologist. 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-09-08.