Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Irma M Oliff, MD

Allergy Physician in Northbrook, IL · enumerated 2006.

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

National Provider Identifier

1811976475

Verified

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Registry record

Entity type Individual (Type 1)

Name Irma M Oliff

Credential MD

Sex Female

Practice address Northbrook, IL, 60062

Phone (847) 272-4296

Enumeration date Jan 12, 2006

Last updated in NPPES Aug 30, 2011

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207KA0200X Allergy Physician Allopathic & Osteopathic Physicians · License 036-099000 (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
036099000	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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1811976475 active?

Yes, as of the latest NPPES snapshot, NPI 1811976475 is active (record last updated 2011-08-30).

How do I verify Irma Oliff's NPI record?

Cross-check NPI 1811976475 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Salmon Goldberg Allergy & Immunology Physician · Northbrook, IL NPI 1487674883 Salmon S Goldberg MD and David S Chudwin Mdsc Allergy & Immunology (Internal Medicine) Physician · Northbrook, IL NPI 1366585614 John Lawson Allergy & Immunology Physician · Northbrook, IL NPI 1689864357 Robert W Boxer Mdsc Allergy & Immunology Physician · Northbrook, IL NPI 1851576045 Champion Chiropractic and Sports Rehab Rehabilitation Chiropractor · Northbrook, IL NPI 1770290629

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-08-30.