Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Cornerstone Sleep Diagnostics, Inc

Sleep Disorder Diagnostic Clinic/Center in South Plainfield, NJ · enumerated 2007 · authorized official Kwai Kong, President.

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

National Provider Identifier

1437333754

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Registry record

Entity type Organization (Type 2)

Legal business name Cornerstone Sleep Diagnostics, Inc

Practice address 2509 Park Ave, South Plainfield, NJ, 07080

Phone (908) 769-0101

Enumeration date Dec 21, 2007

Last updated in NPPES Aug 8, 2008

Taxonomy & classification

261QS1200X Sleep Disorder Diagnostic Clinic/Center Ambulatory Health Care Facilities Primary

Authorized official

Name Kwai Kong

Title President

Phone (609) 647-5664

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 a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Cornerstone Sleep Diagnostics, Inc?

Cornerstone Sleep Diagnostics, Inc is registered in NPPES as a Sleep Disorder Diagnostic Clinic/Center (its primary provider taxonomy).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-08-08.