Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Hillside Ob-Gyn Assoc Inc

Q: What is the NPI number for Hillside Ob-Gyn Assoc Inc?

The NPI for Hillside Ob-Gyn Assoc Inc is 1720065972, a Type 2 (organization) record in the CMS NPPES registry.

Obstetrics & Gynecology Physician in Bethlehem, PA · enumerated 2005 · authorized official Adriaan Van Gaalen, President.

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

National Provider Identifier

1720065972

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Registry record

Entity type Organization (Type 2)

Legal business name Hillside Ob-Gyn Assoc Inc

Practice address 701 Ostrum St, Ste 303, Bethlehem, PA, 18015

Phone (610) 866-2929

Fax (610) 866-3604

Enumeration date Dec 29, 2005

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Adriaan Van Gaalen

Title President

Phone (610) 866-2929

Other identifiers

Identifier	Type	State	Issuer
02347000	Other	PA	BC
0067239	Other	PA	BS

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.

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Frequently asked questions

What is the NPI number for Hillside Ob-Gyn Assoc Inc?

The NPI for Hillside Ob-Gyn Assoc Inc is 1720065972, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Hillside Ob-Gyn Assoc Inc?

NPPES lists Adriaan Van Gaalen (President) as the authorized official for this organization.

Providers at this address

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