Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Gretchen F Tweed, PA-C

Physician Assistant in Oakbrook Terrace, IL · enumerated 2012.

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

National Provider Identifier

1386919256

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Registry record

Entity type Individual (Type 1)

Name Ms. Gretchen F Tweed

Credential PA-C

Sex Female

Practice address 1 Lincoln Ctr Ste 1030, Oakbrook Terrace, IL, 60181

Phone (312) 319-1031

Enumeration date Mar 12, 2012

Last updated in NPPES Jan 22, 2026

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 2939 (CO) Primary

Other identifiers

Identifier	Type	State	Issuer
15109577	Medicaid	CO	-

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

How do I verify Gretchen Tweed's NPI record?

Cross-check NPI 1386919256 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1386919256 active?

Yes, as of the latest NPPES snapshot, NPI 1386919256 is active (record last updated 2026-01-22).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-01-22.