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Dr. Emmanuel Yih-Herng Chang, MD/PHD

Retina Specialist (Ophthalmology) Physician in Bellaire, TX · enumerated 2008 · practices at Retina and Vitreous of Texas Pllc.

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

National Provider Identifier

1083877740

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Registry record

Entity type Individual (Type 1)
Name Dr. Emmanuel Yih-Herng Chang
Credential MD/PHD
Sex Male
Practice address 6565 West Loop S Ste 400, Bellaire, TX, 77401
Phone (713) 799-9975
Fax (713) 799-1095
Enumeration date Jul 3, 2008
Last updated in NPPES Oct 22, 2024

Taxonomy & licenses

207WX0107X Retina Specialist (Ophthalmology) Physician Allopathic & Osteopathic Physicians · License P5786 (TX) Primary
207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License P5786 (TX) Secondary
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
1083877740 Medicaid MI -
1083877740 Other - NPI
322767002 Medicaid TX -
322767003 Medicaid TX -
322767004 Medicaid TX -
322767005 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Emmanuel Chang?
Emmanuel Chang is registered in NPPES with the primary taxonomy of Retina Specialist (Ophthalmology) Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-10-22.