Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Charlie Chih Lee Chang, M.D.

Endocrinology, Diabetes & Metabolism Physician in Webster, TX · enumerated 2006 · practices at Endocrinology Clinic at Clear Lake Specialties Pllc.

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

National Provider Identifier

1417996109

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Registry record

Entity type Individual (Type 1)

Name Charlie Chih Lee Chang

Credential M.D.

Sex Male

Practice address 600 N Kobayashi Ste 312, Webster, TX, 77598

Phone (281) 724-8333

Fax (281) 336-1680

Enumeration date Jun 6, 2006

Last updated in NPPES Jul 7, 2026

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License L6318 (TX) Secondary

207RE0101X Endocrinology, Diabetes & Metabolism Physician Allopathic & Osteopathic Physicians · License L6318 (TX) Primary

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

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 1417996109 active?

Yes, as of the latest NPPES snapshot, NPI 1417996109 is active (record last updated 2026-07-07).

How do I verify Charlie Chang's NPI record?

Cross-check NPI 1417996109 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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