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John L Barstis, MD

Hematology & Oncology Physician in Valencia, CA · enumerated 2006.

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

National Provider Identifier

1528093085

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Registry record

Entity type Individual (Type 1)
Name John L Barstis
Credential MD
Sex Male
Practice address 23929 Mcbean Pkwy, Bldg F Ste 215, Valencia, CA, 91355
Phone (661) 255-5350
Fax (661) 255-9907
Enumeration date Jul 12, 2006
Last updated in NPPES May 26, 2010

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License G39366 (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
00G393660 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.

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Frequently asked questions

Is NPI 1528093085 active?
Yes, as of the latest NPPES snapshot, NPI 1528093085 is active (record last updated 2010-05-26).
How do I verify John Barstis's NPI record?
Cross-check NPI 1528093085 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-05-26.