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Dr. Joel Howard Block, MD

Diagnostic Radiology Physician in Rancho Cucamongo, CA · enumerated 2006.

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

National Provider Identifier

1225098189

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Registry record

Entity type Individual (Type 1)
Name Dr. Joel Howard Block
Credential MD
Sex Male
Practice address 8599 Haven Ave., Suite 300, Rancho Cucamongo, CA, 91730
Phone (909) 620-8180
Fax (866) 735-9647
Enumeration date Mar 24, 2006
Last updated in NPPES Mar 27, 2012

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License G44323 (CA) Primary
2085U0001X Diagnostic Ultrasound Physician Allopathic & Osteopathic Physicians · License G44323 (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
G44323 Other CA LICENSE
CG1263 Other CA RAILROAD MEDICARE
00G443230 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

Where does Joel Block practice?
The practice location on file with NPPES is in Rancho Cucamongo, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Joel Block?
The National Provider Identifier (NPI) for Joel Block is 1225098189, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-03-27.