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Alec Block

Radiation Oncology Physician in Maywood, IL · enumerated 2012.

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

National Provider Identifier

1124375274

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Registry record

Entity type Individual (Type 1)
Name Alec Block
Sex Male
Practice address 2160 South First Ave, Loyola Radation Oncology, Maywood, IL, 60153
Phone (708) 216-2729
Fax (708) 216-5924
Enumeration date Aug 8, 2012
Last updated in NPPES Apr 1, 2021

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 125061878 (IL) Secondary
2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 036142638 (IL) Primary

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

How do I verify Alec Block's NPI record?
Cross-check NPI 1124375274 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1124375274 active?
Yes, as of the latest NPPES snapshot, NPI 1124375274 is active (record last updated 2021-04-01).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-01.