Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Cynthia Hilda Marsack, CNP

Nurse Practitioner in Detroit, MI · enumerated 2005.

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

National Provider Identifier

1518966316

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Registry record

Entity type Individual (Type 1)

Name Ms. Cynthia Hilda Marsack

Credential CNP

Sex Female

Practice address 4100 John R St, Karmanos Cancer Ctr Midlevels, Detroit, MI, 48201

Phone (800) 527-6266

Fax (313) 576-8381

Enumeration date Jul 14, 2005

Last updated in NPPES Mar 7, 2023

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 4704110630 (MI) Primary

363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 4704110630 (MI) Secondary

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 Cynthia Marsack's NPI record?

Cross-check NPI 1518966316 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1518966316 active?

Yes, as of the latest NPPES snapshot, NPI 1518966316 is active (record last updated 2023-03-07).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.