Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Roxanne Jennifer Siemeck, APRN, CNS-BC, FNP-BC

Clinical Nurse Specialist in Oak Lawn, IL · enumerated 2008.

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

National Provider Identifier

1972774560

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Registry record

Entity type Individual (Type 1)

Name Mrs. Roxanne Jennifer Siemeck

Credential APRN, CNS-BC, FNP-BC

Sex Female

Practice address 4440 W 95th St, 6th Floor Outpatient Pavilion, Oak Lawn, IL, 60453

Phone (708) 684-9132

Fax (708) 520-1871

Enumeration date Mar 21, 2008

Last updated in NPPES Jul 25, 2022

Taxonomy & licenses

364SA2200X Adult Health Clinical Nurse Specialist Physician Assistants & Advanced Practice Nursing Providers · License 209007019 (IL) Secondary

364S00000X Clinical Nurse Specialist Physician Assistants & Advanced Practice Nursing Providers · License 209-007019 (IL) Primary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209013887 (IL) Secondary

APRN · Advanced Practice Registered Nurse: An umbrella credential covering NPs, CRNAs, CNMs, and clinical nurse specialists. About the APRN credential

Other identifiers

Identifier	Type	State	Issuer
209013887	Other	IL	FAMILY NURSE PRACTITIONER

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 specialty is Roxanne Siemeck?

Roxanne Siemeck is registered in NPPES with the primary taxonomy of Clinical Nurse Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-25.