Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Janis Wiener, MD

Internal Medicine Physician in Oak Park, IL · enumerated 2006.

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

National Provider Identifier

1750315586

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Registry record

Entity type Individual (Type 1)

Name Janis Wiener

Credential MD

Sex Female

Practice address 965 Lake St, Oak Park, IL, 60301

Phone (708) 386-3000

Enumeration date Jul 10, 2006

Last updated in NPPES May 5, 2021

Taxonomy & licenses

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License 036081282 (IL) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036-081282 (IL) 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
036081282	Medicaid	IL	-

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 Janis Wiener's NPI record?

Cross-check NPI 1750315586 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1750315586 active?

Yes, as of the latest NPPES snapshot, NPI 1750315586 is active (record last updated 2021-05-05).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-05-05.