Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Richard C L Chen MD Ltd

Internal Medicine Physician in Collinsville, IL · enumerated 2011 · authorized official Chau Chen, President.

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

National Provider Identifier

1659678290

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Registry record

Entity type Organization (Type 2)

Legal business name Richard C L Chen MD Ltd

Practice address 415 West Main Street, Suite 4, Collinsville, IL, 62234

Phone (618) 345-1112

Fax (618) 345-1113

Enumeration date Feb 17, 2011

Last updated in NPPES Apr 26, 2011

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036-53838 (IL) Primary

Authorized official

Name Chau Chen

Title President

Phone (618) 345-1112

Other identifiers

Identifier	Type	State	Issuer
036053838	Medicaid	IL	-

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 Richard C L Chen MD Ltd located?

The practice location on file with NPPES is in Collinsville, IL.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2011-04-26. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-04-26.