Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Margaret Mary Sullivan, APN-CNP

Nurse Practitioner in Skokie, IL · enumerated 2006.

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

National Provider Identifier

1821016130

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Registry record

Entity type Individual (Type 1)

Name Margaret Mary Sullivan

Credential APN-CNP

Sex Female

Practice address 9650 Gross Point Rd Ste 3900, Skokie, IL, 60076

Phone (847) 962-6544

Fax (847) 926-6545

Enumeration date Jul 17, 2006

Last updated in NPPES Dec 4, 2024

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209003799 (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 Margaret Sullivan's NPI record?

Cross-check NPI 1821016130 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1821016130 active?

Yes, as of the latest NPPES snapshot, NPI 1821016130 is active (record last updated 2024-12-04).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-12-04.