Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Cynthia Gerstenlauer, NP

Nurse Practitioner in Troy, MI · enumerated 2007.

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

National Provider Identifier

1487773032

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Registry record

Entity type Individual (Type 1)

Name Cynthia Gerstenlauer

Credential NP

Sex Female

Practice address 4600 Investment Dr, Suite 300, Troy, MI, 48098

Phone (248) 267-5000

Fax (248) 267-5001

Enumeration date Mar 28, 2007

Last updated in NPPES Jan 22, 2008

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 114179 (MI) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP credential

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 Cynthia Gerstenlauer?

Cynthia Gerstenlauer is registered in NPPES with the primary taxonomy of Nurse Practitioner. 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.

Other providers at this practice address

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Affiliated Troy Dermatologists, Pllc Specialist · Troy, MI NPI 1467454264 David Kearney Urology Physician · Troy, MI NPI 1023009347 Ilana Kutinsky Clinical Cardiac Electrophysiology Physician · Troy, MI NPI 1821089087 Partha Nandi Gastroenterology Physician · Troy, MI NPI 1184605206 Leonard Quallich Gastroenterology Physician · Troy, MI NPI 1093797326 Mehmet Donat Gastroenterology Physician · Troy, MI NPI 1003898347 Steven Ajluni Cardiovascular Disease Physician · Troy, MI NPI 1346222353 Brian Williamson Clinical Cardiac Electrophysiology Physician · Troy, MI NPI 1255313268

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-01-22.