Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Matthew W Arnold, M.D.

Neurology Physician in Berkeley, CA · enumerated 2006.

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

National Provider Identifier

1477504926

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Registry record

Entity type Individual (Type 1)

Name Matthew W Arnold

Credential M.D.

Sex Male

Practice address 2850 Telegraph Ave Ste 110, Berkeley, CA, 94705

Phone (510) 204-8140

Fax (510) 506-7721

Enumeration date May 12, 2006

Last updated in NPPES May 10, 2019

Taxonomy & licenses

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License A81482 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
A81482	Other	CA	STATE MEDICAL LICENSE

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 Matthew Arnold?

Matthew Arnold is registered in NPPES with the primary taxonomy of Neurology Physician. 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 2019-05-10.