Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Leyland Arthur Thomas, MD

Internal Medicine Physician in Granite City, IL · enumerated 2006 · practices at Medicate Pharmacy Inc.

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

National Provider Identifier

1922068121

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Leyland Arthur Thomas

Credential MD

Sex Male

Practice address 2166 Madison Ave, Granite City, IL, 62040

Phone (618) 452-3301

Fax (618) 452-3312

Enumeration date Mar 23, 2006

Last updated in NPPES Jun 18, 2014

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 036084658 (IL) Secondary

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 036048 (MO) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036084658 (IL) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
135939	Other	MO	BCBS OF MISSOURI
0097200550	Other	IL	BCBS OF ILLINOIS
203425913	Medicaid	MO	-

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

Is NPI 1922068121 active?

Yes, as of the latest NPPES snapshot, NPI 1922068121 is active (record last updated 2014-06-18).

How do I verify Leyland Thomas's NPI record?

Cross-check NPI 1922068121 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-06-18.