Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Barry Michael Czeisler, M.D.

Neurocritical Care Physician in Torrance, CA · enumerated 2008.

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

National Provider Identifier

1134379654

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Registry record

Entity type Individual (Type 1)

Name Dr. Barry Michael Czeisler

Credential M.D.

Sex Male

Practice address 4101 Torrance Blvd, Torrance, CA, 90503

Phone (310) 303-6833

Fax (310) 303-6834

Enumeration date Sep 19, 2008

Last updated in NPPES Sep 17, 2021

Taxonomy & licenses

2084A2900X Neurocritical Care Physician Allopathic & Osteopathic Physicians · License 265862 (NY) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License C172500 (CA) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 265862 (NY) Secondary

2084A2900X Neurocritical Care Physician Allopathic & Osteopathic Physicians · License C172500 (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
03500112	Medicaid	NY	-

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 is the NPI number for Barry Czeisler?

The National Provider Identifier (NPI) for Barry Czeisler is 1134379654, a Type 1 (individual) record in the CMS NPPES registry.

Where does Barry Czeisler practice?

The practice location on file with NPPES is in Torrance, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Rudo Benjamin Internal Medicine Physician · Torrance, CA NPI 1295736676 Carl Feld Internal Medicine Physician · Torrance, CA NPI 1205837697 Little Co Pharmacy Pharmacy · Torrance, CA NPI 1437142312 John Jordan Diagnostic Radiology Physician · Torrance, CA NPI 1720060791 Adah Duncan Diagnostic Radiology Physician · Torrance, CA NPI 1609858422 Lalitha Ramanna Nuclear Medicine Physician · Torrance, CA NPI 1396727889 Lucas Nishioka Diagnostic Radiology Physician · Torrance, CA NPI 1467434001 Robert Kolanz Diagnostic Radiology Physician · Torrance, CA NPI 1447232822

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-09-17.