Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Wynn Mcmullen, M.D.

Ophthalmology Physician in Webster, TX · enumerated 2005.

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

National Provider Identifier

1013911072

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Registry record

Entity type Individual (Type 1)

Name Dr. William Wynn Mcmullen

Credential M.D.

Sex Male

Practice address 555 E Medical Center Blvd, Suite 101, Webster, TX, 77598

Phone (281) 488-7213

Fax (281) 488-1387

Enumeration date Jun 8, 2005

Last updated in NPPES Oct 25, 2022

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License H2595 (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
139674913	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 is the NPI number for William Mcmullen?

The National Provider Identifier (NPI) for William Mcmullen is 1013911072, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Mcmullen practice?

The practice location on file with NPPES is in Webster, TX. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-10-25.