Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Horizon Research Unlimited LLC

Cardiovascular Disease Physician in Ridgewood, NJ · enumerated 2010 · authorized official Marcus Williams, MD.

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

National Provider Identifier

1174845812

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name Horizon Research Unlimited LLC

Practice address 230 E Ridgewood Ave, Medical Clinic, Ridgewood, NJ, 07450

Phone (201) 967-8425

Fax (201) 967-8443

Enumeration date Feb 22, 2010

Last updated in NPPES Feb 22, 2010

Taxonomy & classification

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 25MA065036 (NJ) Primary

Authorized official

Name Marcus Williams

Title MD

Phone (201) 967-8425

Other identifiers

Identifier	Type	State	Issuer
7284501	Medicaid	NJ	-

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

Where is Horizon Research Unlimited LLC located?

The practice location on file with NPPES is in Ridgewood, NJ.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2010-02-22. Verify at npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-02-22.