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

Mrs. Ruth Lynne Clark-Brown, M.D.

Neurology Physician in East Orange, NJ · enumerated 2006.

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

National Provider Identifier

1740349968

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Registry record

Entity type Individual (Type 1)

Name Mrs. Ruth Lynne Clark-Brown

Credential M.D.

Sex Female

Practice address East Orange, NJ, 07018

Phone (973) 674-3500

Fax (973) 678-6319

Enumeration date Dec 6, 2006

Last updated in NPPES Mar 3, 2011

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

Taxonomy & licenses

174400000X Specialist Other Service Providers · License MA56498 (NJ) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License MA56498 (NJ) 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
135853	Other	NJ	MEDICARE GROUP
280330501	Other	NJ	MEDICAID GROUP
5069408	Medicaid	NJ	-

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 Ruth Clark-Brown?

Ruth Clark-Brown 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 2011-03-03.