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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Cheryl Chastine, M.D.

Family Medicine Physician in Oak Park, IL · enumerated 2009.

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

National Provider Identifier

1831325505

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Registry record

Entity type Individual (Type 1)
Name Cheryl Chastine
Credential M.D.
Sex Female
Practice address 917 S Oak Park Ave, Suite B, Oak Park, IL, 60304
Phone (708) 358-0791
Fax (708) 358-1418
Enumeration date Jun 8, 2009
Last updated in NPPES Jul 20, 2012

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 125056559 (IL) Secondary
207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 036.128802 (IL) 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

Is NPI 1831325505 active?
Yes, as of the latest NPPES snapshot, NPI 1831325505 is active (record last updated 2012-07-20).
How do I verify Cheryl Chastine's NPI record?
Cross-check NPI 1831325505 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 2012-07-20.