Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Henry Macklin, M.D., FACS

Specialist in Alexandria, LA · enumerated 2006.

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

National Provider Identifier

1972690584

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Registry record

Entity type Individual (Type 1)

Name William Henry Macklin

Credential M.D., FACS

Sex Male

Practice address 3311 Prescott Rd, Suite 105, Alexandria, LA, 71301

Phone (318) 484-2667

Fax (318) 484-2696

Enumeration date Oct 6, 2006

Last updated in NPPES Dec 30, 2008

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 15241R (LA) Primary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 40871 (AZ) 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
1165247	Medicaid	LA	-

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

What specialty is William Macklin?

William Macklin is registered in NPPES with the primary taxonomy of Specialist. 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 2008-12-30.