Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Barrett Jeffrey Wallis, MD

Gastroenterology Physician in Crystal River, FL · enumerated 2006.

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

National Provider Identifier

1740220938

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Registry record

Entity type Individual (Type 1)

Name Barrett Jeffrey Wallis

Credential MD

Sex Male

Practice address Crystal River, FL, 34429

Phone (352) 564-3900

Fax (352) 564-3906

Enumeration date Jun 7, 2006

Last updated in NPPES Oct 10, 2024

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 35.088718 (OH) Secondary

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License ME48685 (FL) 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
12042524	Other	NY	MULTIPLAN
333619	Other	FL	AVMED
001690000	Medicaid	FL	-
146VV	Other	FL	BCBS OF FLORIDA
1299092	Other	NY	GHI GROUP HEALTH INC

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 Barrett Wallis?

Barrett Wallis is registered in NPPES with the primary taxonomy of Gastroenterology 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.

Other providers at this practice address

Browse all →

Quintessential Health Services, Inc Rural Health Clinic/Center · Crystal River, FL NPI 1184643223 Kenneth Spilios Medical Physician Assistant · Crystal River, FL NPI 1760558795 B Jeffrey Wallis MD PA Gastroenterology Physician · Crystal River, FL NPI 1003199076 Joshua Williams Physician Assistant · Crystal River, FL NPI 1891414207

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