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

John Tracy Warren, MD

Q: What is the NPI number for John Warren?

The National Provider Identifier (NPI) for John Warren is 1407871684, a Type 1 (individual) record in the CMS NPPES registry.

Geriatric Medicine (Family Medicine) Physician in Jericho, VT · enumerated 2006.

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

National Provider Identifier

1407871684

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Registry record

Entity type Individual (Type 1)

Name John Tracy Warren

Credential MD

Sex Male

Practice address Jericho, VT, 05465

Phone (920) 435-1503

Enumeration date Jul 12, 2006

Last updated in NPPES Nov 23, 2022

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

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 29771 (WI) Secondary

207QG0300X Geriatric Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians · License 29771-020 (WI) 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
31516000	Medicaid	WI	-

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 John Warren?

The National Provider Identifier (NPI) for John Warren is 1407871684, a Type 1 (individual) record in the CMS NPPES registry.

Where does John Warren practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-11-23.