Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Karin B Ulstrup, MD

Internal Medicine Physician in Chicago, IL · enumerated 2005 · practices at Northwestern Medical Faculty Foundation.

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

National Provider Identifier

1922091420

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Registry record

Entity type Individual (Type 1)

Name Dr. Karin B Ulstrup

Credential MD

Sex Female

Practice address 259 E Erie St, Ste 2330, Chicago, IL, 60611

Phone (312) 926-6000

Fax (312) 926-6323

Enumeration date Aug 30, 2005

Last updated in NPPES Jan 21, 2021

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036110743 (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
036110743	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

What is the NPI number for Karin Ulstrup?

The National Provider Identifier (NPI) for Karin Ulstrup is 1922091420, a Type 1 (individual) record in the CMS NPPES registry.

Where does Karin Ulstrup practice?

The practice location on file with NPPES is in Chicago, IL. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-01-21.