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

Dr. John Chih Chiu Sr., M.D.

Neurological Surgery Physician in Newbury Park, CA · enumerated 2007.

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

National Provider Identifier

1245383884

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Registry record

Entity type Individual (Type 1)

Name Dr. John Chih Chiu Sr.

Credential M.D.

Sex Male

Practice address Newbury Park, CA, 91320

Phone (805) 375-7900

Fax (805) 375-7975

Enumeration date Jan 18, 2007

Last updated in NPPES Nov 26, 2008

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

Taxonomy & licenses

207T00000X Neurological Surgery Physician Allopathic & Osteopathic Physicians · License C31784 (CA) Primary

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

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Frequently asked questions

What specialty is John Chiu?

John Chiu is registered in NPPES with the primary taxonomy of Neurological Surgery 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.

Other providers at this practice address

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Erik Spayde Orthopaedic Surgery Physician · Thousand Oaks, CA NPI 1609818822 Erik C. Spayde, M.D., Inc. Orthopaedic Surgery Physician · Thousand Oaks, CA NPI 1790717965 California Back Specialists Medical Group, Inc Neurological Surgery Physician · Newbury Park, CA NPI 1861502205 Hillcrest Mri Medical Group Body Imaging Physician · Newbury Park, CA NPI 1801906268 California Spine Institute Medical Center, Inc. Physical Medicine & Rehabilitation Physician · Thousand Oaks, CA NPI 1952411027 California Minimally Invasive Surgical Center, Inc. Ambulatory Surgical Clinic/Center · Newbury Park, CA NPI 1619087772 Conejo Neurological Medical Group, Inc. Neurological Surgery Physician · Thousand Oaks, CA NPI 1013010578 Thousand Oaks Spine Medical Group, Inc. Neurological Surgery Physician · Newbury Park, CA NPI 1699862227

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-11-26.