Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Dewey Lei, M.D.

Q: What is the NPI number for William Lei?

The National Provider Identifier (NPI) for William Lei is 1063472603, a Type 1 (individual) record in the CMS NPPES registry.

Emergency Medical Services (Emergency Medicine) Physician in Oklahoma City, OK · enumerated 2006 · practices at Laboratory Corporation of America.

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

National Provider Identifier

1063472603

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Registry record

Entity type Individual (Type 1)

Name William Dewey Lei

Credential M.D.

Sex Male

Practice address 8325 Nw Expressway St, C/O Mercy After Hours, Oklahoma City, OK, 73162

Phone (405) 749-7099

Fax (405) 749-4561

Enumeration date Mar 27, 2006

Last updated in NPPES Aug 5, 2010

Taxonomy & licenses

207PE0004X Emergency Medical Services (Emergency Medicine) Physician Allopathic & Osteopathic Physicians · License 19801 (PR) 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
100156160A	Medicaid	OK	-
P00247931	Other	OK	RR MEDICARE

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

Where does William Lei practice?

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

What is the NPI number for William Lei?

The National Provider Identifier (NPI) for William Lei is 1063472603, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Laboratory Corporation of America Clinical Medical Laboratory · Oklahoma City, OK NPI 1851376255

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-08-05.