Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John Darren Clark, MD

Internal Medicine Physician in Arlington, TX · enumerated 2006.

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

National Provider Identifier

1528077112

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Registry record

Entity type Individual (Type 1)

Name John Darren Clark

Credential MD

Sex Male

Practice address 800 W Randol Mill Rd Ste 2300, Arlington, TX, 76012

Phone (866) 202-1032

Fax (817) 548-6649

Enumeration date Aug 5, 2006

Last updated in NPPES May 26, 2009

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License E2554 (AR) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License M9928 (TX) 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
140285001	Medicaid	AR	-
198329802	Medicaid	TX	-
198329803	Medicaid	TX	-
198329801	Medicaid	TX	-

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

How do I verify John Clark's NPI record?

Cross-check NPI 1528077112 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1528077112 active?

Yes, as of the latest NPPES snapshot, NPI 1528077112 is active (record last updated 2009-05-26).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-05-26.