Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Larry Ham Ob-Gyn, PC

Q: What is the NPI number for Larry Ham Ob-Gyn, PC?

The NPI for Larry Ham Ob-Gyn, PC is 1861521981, a Type 2 (organization) record in the CMS NPPES registry.

Gynecology Physician in Rockville Centre, NY · enumerated 2007 · authorized official Maryann Vavas, Credentials.

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

National Provider Identifier

1861521981

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Registry record

Entity type Organization (Type 2)

Legal business name Larry Ham Ob-Gyn, PC

Practice address 176 N Village Ave, Site 1c, Rockville Centre, NY, 11570

Phone (516) 594-1068

Enumeration date Mar 5, 2007

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

207VG0400X Gynecology Physician Allopathic & Osteopathic Physicians · License 213395 (NY) Primary

Authorized official

Name Maryann Vavas

Title Credentials

Phone (516) 255-1616

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

Who is the authorized official for Larry Ham Ob-Gyn, PC?

NPPES lists Maryann Vavas (Credentials) as the authorized official for this organization.

What is the NPI number for Larry Ham Ob-Gyn, PC?

The NPI for Larry Ham Ob-Gyn, PC is 1861521981, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.