NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Miss Denise Marie Mack, R.N.

Nursing Care Agency in New York, NY · enumerated 2010.

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

National Provider Identifier

1871808840

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Registry record

Entity type Individual (Type 1)
Name Miss Denise Marie Mack
Credential R.N.
Sex Female
Practice address New York, NY, 10017
Phone (212) 697-5730
Enumeration date Aug 13, 2010
Last updated in NPPES Aug 13, 2010

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

251J00000X Nursing Care Agency Agencies · License 333894 (NY) Primary
RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN credential

Other identifiers

Identifier Type State Issuer
163W00000X Other NY GOTHAM COMPANIES

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 is the NPI number for Denise Mack?
The National Provider Identifier (NPI) for Denise Mack is 1871808840, a Type 1 (individual) record in the CMS NPPES registry.
Where does Denise Mack practice?
The practice location on file with NPPES is in New York, NY. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-08-13.