Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Marsha A Niles, N.P.

Adult Health Nurse Practitioner in Lawrence, NY · enumerated 2013 · practices at Arsenio Medical, P.C..

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

National Provider Identifier

1558604223

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Registry record

Entity type Individual (Type 1)

Name Ms. Marsha A Niles

Credential N.P.

Sex Female

Practice address 215 Rockaway Tpke, Lawrence, NY, 11559

Phone (516) 374-5024

Fax (516) 792-0619

Enumeration date Apr 1, 2013

Last updated in NPPES Apr 1, 2013

Taxonomy & licenses

363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 306205 (NY) 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

Is NPI 1558604223 active?

Yes, as of the latest NPPES snapshot, NPI 1558604223 is active (record last updated 2013-04-01).

How do I verify Marsha Niles's NPI record?

Cross-check NPI 1558604223 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-04-01.