Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Marilyn Sullivan, NP

Psychiatric/Mental Health Nurse Practitioner in Webster, NY · enumerated 2006 · practices at Webster Psychiatry & Medicine, Pllc.

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

National Provider Identifier

1003929373

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Registry record

Entity type Individual (Type 1)

Name Ms. Marilyn Sullivan

Credential NP

Sex Female

Practice address 1527 Empire Blvd, Webster, NY, 14580

Phone (585) 670-0507

Fax (585) 645-0939

Enumeration date Aug 17, 2006

Last updated in NPPES May 24, 2021

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License F400291 (NY) Secondary

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License F400291 (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 1003929373 active?

Yes, as of the latest NPPES snapshot, NPI 1003929373 is active (record last updated 2021-05-24).

How do I verify Marilyn Sullivan's NPI record?

Cross-check NPI 1003929373 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Sahar Elezabi Psychiatry Physician · Webster, NY NPI 1548219181 Webster Psychiatry & Medicine, Pllc Psychiatry Physician · Webster, NY NPI 1003099474

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-05-24.