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

Dr. Newton Seiden, M.D.

Pediatric Anesthesiology Physician in Madera, CA · enumerated 2006.

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

National Provider Identifier

1164519674

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Registry record

Entity type Individual (Type 1)

Name Dr. Newton Seiden

Credential M.D.

Sex Male

Practice address Madera, CA, 93636

Phone (559) 353-5700

Fax (559) 353-5708

Enumeration date Oct 6, 2006

Last updated in NPPES May 28, 2026

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

Taxonomy & licenses

207LP3000X Pediatric Anesthesiology Physician Allopathic & Osteopathic Physicians · License G68506 (CA) Primary

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License G68506 (CA) Secondary

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
ZZZ71868Z	Medicaid	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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Newton Seiden?

Newton Seiden is registered in NPPES with the primary taxonomy of Pediatric Anesthesiology 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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-05-28.