Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Earl Gusa Jr., MD

Pain Medicine (Anesthesiology) Physician in Jackson, MS · enumerated 2005.

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

National Provider Identifier

1083614317

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Registry record

Entity type Individual (Type 1)

Name Dr. William Earl Gusa Jr.

Credential MD

Sex Male

Practice address 2500 North State Street, Jackson, MS, 39216

Phone (601) 815-1196

Fax (601) 984-5939

Enumeration date Jul 28, 2005

Last updated in NPPES Apr 26, 2016

Taxonomy & licenses

207LP2900X Pain Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians · License MD052249L (PA) Secondary

207LP2900X Pain Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians · License 24076 (MS) 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
0014801510003	Medicaid	PA	-
P01620200	Other	MS	RAILROAD 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.

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Frequently asked questions

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.

What specialty is William Gusa?

William Gusa is registered in NPPES with the primary taxonomy of Pain Medicine (Anesthesiology) Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-04-26.